Prof. Dr. Martino Poggio Department of Physics Profiles & Affiliations OverviewResearch Publications Projects & Collaborations Projects & Collaborations OverviewResearch Publications Projects & Collaborations Profiles & Affiliations Projects & Collaborations 27 foundShow per page10 10 20 50 Metrology for superconducting qubits (SRT-f07) Research Project | 2 Project MembersImported from Grants Tool 4700733 Quantum anomalous Hall effect materials and devices for metrology (SRT-f02) Research Project | 2 Project MembersImported from Grants Tool 4700734 Milli-Kelvin and high-bandwidth scanning SQUID microscope Research Project | 1 Project MembersImported from Grants Tool 4665410 Superconducting circuit engineering using scanning SQUID microscopy (SuperSQUID) Research Project | 1 Project MembersNo Description available Real-space imaging of spin textures in polar magnet VOSe2O5 Research Project | 2 Project MembersNo Description available Revealing 2D magnetism via nanoscale magnetometry Research Project | 4 Project MembersTwo-dimensional (2D) magnets have emerged as a new frontier in magnetism, both in terms of fundamental questions - including why such magnetism is stable at all - as well as from the device engineering point of view. In general, the stacking, twisting, and combining of van der Waals (vdW) materials with control down to individual atomic layers has started a revolution in heterostructure engineering. Layer-by-layer control offers a multitude of possible material combinations, without constraints imposed by lattice mismatch, along with the prospect of making compact devices, in which large electric fields can easily be applied. These new tools give researchers unprecedented control of interactions and band structure, as exemplified by the 2018 realization of superconducting twisted bilayer graphene. In the realm of magnetism, these methods can be used to tune the magnetic properties of a material or even to make materials, which are non-magnetic in the bulk, magnetic in 2D. Most importantly, both in view of understanding the physics of 2D magnetism and exploiting it for applications, vdW engineering may allow us to realize new and useful magnetic phases, which are only possible in 2D. In order to fully take advantage of these new developments, we must understand the role of anisotropy, disorder, inhomogeneity, and characteristic length-scales in 2D magnets and their heterostructures. Such investigations require sensitive local probes and techniques for measuring magnetism in small volumes. Our group, which has long worked at the forefront of sensitive magnetic imaging and torque magnetometry, is ideally positioned for such measurements. Here, we propose to apply our unique and highly sensitive tools to three types of measurements in 2D magnets: The characterization of static magnetism : determining the magnetic state and its dependence on the number of layers, anisotropy, as well as the presence of spatially modulated states, domains, defects, and inhomogeneities. The study of phase transitions and magnetic reversal : measuring the stability of magnetic phases, the nature of phase transitions, the process of magnetic reversal, and the role of domains and inhomogeneity therein. Understanding how to engineer 2D magnets : observing the effects of stacking, twisting, and applying electric fields to controllably induce phase transitions, magnetic reversal, magnetic texture, or new magnetic phases. The work of unravelling the mechanisms behind 2D magnetism is in its infancy. Given the inadequacy of conventional magnetic probes, we are convinced that our unique nanometer-scale magnetic field imaging and ultrasensitive torque magnetometry tools have much to contribute towards this effort. The results can be expected to have implications for 2D spintronic devices, 2D antiferromagnets, and the design of quantum materials via 2D vdW engineering in general. Ultra high precision electron beam lithography system for nanodevice and nanostructures definition Research Project | 6 Project MembersIn the last decades nano- and quantum-science have been steadily growing in large part also thanks to the availability of ever more advanced processing, manipulation, and imaging tech-niques. Specifically, nanofabrication has been the leading enabler of experiments and devices, in which quantum mechanics play a key role. The University of Basel is nationally and internationally recognized as a leader innanoscience and nanotechnology. It was the leading house of the National Center in Competence and Re-search (NCCR) on Nanoscience, which later became the Swiss Nanoscience Institute (SNI). The University of Basel is leading the NCCR SPIN for the realization of spin qubits in Silicon and is also co-leading the NCCR QSIT on Quantum Science and Technology (with ETHZ as Leading House). The present proposal to the SNF R'Equip scheme is a joint effort of six principal investigators (PIs) in the physics department of the University of Basel, who work on current topics in quantum- and nano-science. The PIs, who submit this proposal together, do research that relies on the availability of state-of-the-art fabrication tools, such as an electron beam lithography (EBL) system. The proposal makes the case for the purchase of an ultra-high precision EBL system that combines high resolution, tunable acceleration voltages, different write-field size, ultra-high precision alignment, proximity correction, and mechanical stability. This combination is unique and crucial for the University of Basel to stay at the forefront of nano-science and technology. The system will be installed in the new clean room shared between the University of Basel and the Department of Biosystem Science and Engineering of the ETH. Therefore, the purchased system will be available for the users of the clean-room. Scanning Nanowire Quantum Dot Research Project | 2 Project MembersIn this project we aim to combine the exceptional sensitivity of nanowire quantum dots as detectors of charge with scanning probe capabilities of customized cantilevers. The resulting scanning nanowire quantum dot will enable imaging of localized charges and electron densities with high sensitivity, high resolution, and under a large variety of environmental circumstances. FIBsuperProbes / Focused Ion Beam fabrication of superconducting scanning Probes Research Project | 3 Project MembersOur vision is to enable a new era in scanning probe microscopy (SPM), in which nanometer-scale sensing devices - specifically superconducting devices - can be directly patterned on-tip and used to reveal new types of contrast. To realize this vision, we will use focused ion beam (FIB) techniques to produce sensors with unprecedented size, functionality, and sensitivity directly on the tips of custom-designed cantilevers. The key to this undertaking will be the unique capability of FIB to mill, grow, or structurally modify materials - especially superconductors - at the nanometer-scale and on non-planar surfaces. Our FIB-fabricated probes will include on-tip nanometer-scale Josephson junctions (JJs) and superconducting quantum interference devices (SQUIDs) for mapping magnetic fields, magnetic susceptibility, electric currents, and dissipation. Crucially, the custom-built cantilevers, on which the sensors will be patterned, will enable nanometer-scale distance control, endowing our probes with exquisite spatial resolution and simultaneous topographic contrast. The resulting imaging techniques will significantly surpass state-of-the-art SPM and help us to unravel poorly understood phenomena in physics, chemistry, and material science, which are impossible to address with today's technology. NCCR SPIN Spin Qubits in Silicon Research Project | 11 Project MembersThe main objective of NCCR SPIN is to develop reliable, fast, compact, scalable spin qubits in silicon and germanium. The vision is to control single spins with electrical means. Fast control of individual spins can be achieved with electrical pulses via a spin-orbit interaction. The spin-orbit interaction is either inherent (hole spin) or synthetic (electron spin in a magnetic field gradient). It also allows neighbouring spins to be coupled together electrically via superconducting resonators or floating gates. The specific aim of the first phase of the project is to develop the silicon spin qubits and spin-spin coupling strategies. Beyond fundamental research on the qubits and their architecture, there are further research efforts in many related areas of quantum computing, such as quantum error correction, quantum information, quantum algorithms and software, qubit control electronics and cryo-MOS, NISQ applications and algorithms. The long term goal is fault-tolerant universal quantum computing with a large number of logical qubits. The NCCR SPIN team consists of researchers from the University of Basel , IBM Research - Zurich , ETH Zurich , and EPF Lausanne . The team members are experts from various disciplines, such as quantum physics, materials science, engineering and computer science. In addition to the collaboration between academia and industry, the NCCR SPIN is characterized by very close links between theory and experiment as well as physics, materials science and engineering. The home institution is the University of Basel . 123 123 OverviewResearch Publications Projects & Collaborations
Projects & Collaborations 27 foundShow per page10 10 20 50 Metrology for superconducting qubits (SRT-f07) Research Project | 2 Project MembersImported from Grants Tool 4700733 Quantum anomalous Hall effect materials and devices for metrology (SRT-f02) Research Project | 2 Project MembersImported from Grants Tool 4700734 Milli-Kelvin and high-bandwidth scanning SQUID microscope Research Project | 1 Project MembersImported from Grants Tool 4665410 Superconducting circuit engineering using scanning SQUID microscopy (SuperSQUID) Research Project | 1 Project MembersNo Description available Real-space imaging of spin textures in polar magnet VOSe2O5 Research Project | 2 Project MembersNo Description available Revealing 2D magnetism via nanoscale magnetometry Research Project | 4 Project MembersTwo-dimensional (2D) magnets have emerged as a new frontier in magnetism, both in terms of fundamental questions - including why such magnetism is stable at all - as well as from the device engineering point of view. In general, the stacking, twisting, and combining of van der Waals (vdW) materials with control down to individual atomic layers has started a revolution in heterostructure engineering. Layer-by-layer control offers a multitude of possible material combinations, without constraints imposed by lattice mismatch, along with the prospect of making compact devices, in which large electric fields can easily be applied. These new tools give researchers unprecedented control of interactions and band structure, as exemplified by the 2018 realization of superconducting twisted bilayer graphene. In the realm of magnetism, these methods can be used to tune the magnetic properties of a material or even to make materials, which are non-magnetic in the bulk, magnetic in 2D. Most importantly, both in view of understanding the physics of 2D magnetism and exploiting it for applications, vdW engineering may allow us to realize new and useful magnetic phases, which are only possible in 2D. In order to fully take advantage of these new developments, we must understand the role of anisotropy, disorder, inhomogeneity, and characteristic length-scales in 2D magnets and their heterostructures. Such investigations require sensitive local probes and techniques for measuring magnetism in small volumes. Our group, which has long worked at the forefront of sensitive magnetic imaging and torque magnetometry, is ideally positioned for such measurements. Here, we propose to apply our unique and highly sensitive tools to three types of measurements in 2D magnets: The characterization of static magnetism : determining the magnetic state and its dependence on the number of layers, anisotropy, as well as the presence of spatially modulated states, domains, defects, and inhomogeneities. The study of phase transitions and magnetic reversal : measuring the stability of magnetic phases, the nature of phase transitions, the process of magnetic reversal, and the role of domains and inhomogeneity therein. Understanding how to engineer 2D magnets : observing the effects of stacking, twisting, and applying electric fields to controllably induce phase transitions, magnetic reversal, magnetic texture, or new magnetic phases. The work of unravelling the mechanisms behind 2D magnetism is in its infancy. Given the inadequacy of conventional magnetic probes, we are convinced that our unique nanometer-scale magnetic field imaging and ultrasensitive torque magnetometry tools have much to contribute towards this effort. The results can be expected to have implications for 2D spintronic devices, 2D antiferromagnets, and the design of quantum materials via 2D vdW engineering in general. Ultra high precision electron beam lithography system for nanodevice and nanostructures definition Research Project | 6 Project MembersIn the last decades nano- and quantum-science have been steadily growing in large part also thanks to the availability of ever more advanced processing, manipulation, and imaging tech-niques. Specifically, nanofabrication has been the leading enabler of experiments and devices, in which quantum mechanics play a key role. The University of Basel is nationally and internationally recognized as a leader innanoscience and nanotechnology. It was the leading house of the National Center in Competence and Re-search (NCCR) on Nanoscience, which later became the Swiss Nanoscience Institute (SNI). The University of Basel is leading the NCCR SPIN for the realization of spin qubits in Silicon and is also co-leading the NCCR QSIT on Quantum Science and Technology (with ETHZ as Leading House). The present proposal to the SNF R'Equip scheme is a joint effort of six principal investigators (PIs) in the physics department of the University of Basel, who work on current topics in quantum- and nano-science. The PIs, who submit this proposal together, do research that relies on the availability of state-of-the-art fabrication tools, such as an electron beam lithography (EBL) system. The proposal makes the case for the purchase of an ultra-high precision EBL system that combines high resolution, tunable acceleration voltages, different write-field size, ultra-high precision alignment, proximity correction, and mechanical stability. This combination is unique and crucial for the University of Basel to stay at the forefront of nano-science and technology. The system will be installed in the new clean room shared between the University of Basel and the Department of Biosystem Science and Engineering of the ETH. Therefore, the purchased system will be available for the users of the clean-room. Scanning Nanowire Quantum Dot Research Project | 2 Project MembersIn this project we aim to combine the exceptional sensitivity of nanowire quantum dots as detectors of charge with scanning probe capabilities of customized cantilevers. The resulting scanning nanowire quantum dot will enable imaging of localized charges and electron densities with high sensitivity, high resolution, and under a large variety of environmental circumstances. FIBsuperProbes / Focused Ion Beam fabrication of superconducting scanning Probes Research Project | 3 Project MembersOur vision is to enable a new era in scanning probe microscopy (SPM), in which nanometer-scale sensing devices - specifically superconducting devices - can be directly patterned on-tip and used to reveal new types of contrast. To realize this vision, we will use focused ion beam (FIB) techniques to produce sensors with unprecedented size, functionality, and sensitivity directly on the tips of custom-designed cantilevers. The key to this undertaking will be the unique capability of FIB to mill, grow, or structurally modify materials - especially superconductors - at the nanometer-scale and on non-planar surfaces. Our FIB-fabricated probes will include on-tip nanometer-scale Josephson junctions (JJs) and superconducting quantum interference devices (SQUIDs) for mapping magnetic fields, magnetic susceptibility, electric currents, and dissipation. Crucially, the custom-built cantilevers, on which the sensors will be patterned, will enable nanometer-scale distance control, endowing our probes with exquisite spatial resolution and simultaneous topographic contrast. The resulting imaging techniques will significantly surpass state-of-the-art SPM and help us to unravel poorly understood phenomena in physics, chemistry, and material science, which are impossible to address with today's technology. NCCR SPIN Spin Qubits in Silicon Research Project | 11 Project MembersThe main objective of NCCR SPIN is to develop reliable, fast, compact, scalable spin qubits in silicon and germanium. The vision is to control single spins with electrical means. Fast control of individual spins can be achieved with electrical pulses via a spin-orbit interaction. The spin-orbit interaction is either inherent (hole spin) or synthetic (electron spin in a magnetic field gradient). It also allows neighbouring spins to be coupled together electrically via superconducting resonators or floating gates. The specific aim of the first phase of the project is to develop the silicon spin qubits and spin-spin coupling strategies. Beyond fundamental research on the qubits and their architecture, there are further research efforts in many related areas of quantum computing, such as quantum error correction, quantum information, quantum algorithms and software, qubit control electronics and cryo-MOS, NISQ applications and algorithms. The long term goal is fault-tolerant universal quantum computing with a large number of logical qubits. The NCCR SPIN team consists of researchers from the University of Basel , IBM Research - Zurich , ETH Zurich , and EPF Lausanne . The team members are experts from various disciplines, such as quantum physics, materials science, engineering and computer science. In addition to the collaboration between academia and industry, the NCCR SPIN is characterized by very close links between theory and experiment as well as physics, materials science and engineering. The home institution is the University of Basel . 123 123
Metrology for superconducting qubits (SRT-f07) Research Project | 2 Project MembersImported from Grants Tool 4700733
Quantum anomalous Hall effect materials and devices for metrology (SRT-f02) Research Project | 2 Project MembersImported from Grants Tool 4700734
Milli-Kelvin and high-bandwidth scanning SQUID microscope Research Project | 1 Project MembersImported from Grants Tool 4665410
Superconducting circuit engineering using scanning SQUID microscopy (SuperSQUID) Research Project | 1 Project MembersNo Description available
Real-space imaging of spin textures in polar magnet VOSe2O5 Research Project | 2 Project MembersNo Description available
Revealing 2D magnetism via nanoscale magnetometry Research Project | 4 Project MembersTwo-dimensional (2D) magnets have emerged as a new frontier in magnetism, both in terms of fundamental questions - including why such magnetism is stable at all - as well as from the device engineering point of view. In general, the stacking, twisting, and combining of van der Waals (vdW) materials with control down to individual atomic layers has started a revolution in heterostructure engineering. Layer-by-layer control offers a multitude of possible material combinations, without constraints imposed by lattice mismatch, along with the prospect of making compact devices, in which large electric fields can easily be applied. These new tools give researchers unprecedented control of interactions and band structure, as exemplified by the 2018 realization of superconducting twisted bilayer graphene. In the realm of magnetism, these methods can be used to tune the magnetic properties of a material or even to make materials, which are non-magnetic in the bulk, magnetic in 2D. Most importantly, both in view of understanding the physics of 2D magnetism and exploiting it for applications, vdW engineering may allow us to realize new and useful magnetic phases, which are only possible in 2D. In order to fully take advantage of these new developments, we must understand the role of anisotropy, disorder, inhomogeneity, and characteristic length-scales in 2D magnets and their heterostructures. Such investigations require sensitive local probes and techniques for measuring magnetism in small volumes. Our group, which has long worked at the forefront of sensitive magnetic imaging and torque magnetometry, is ideally positioned for such measurements. Here, we propose to apply our unique and highly sensitive tools to three types of measurements in 2D magnets: The characterization of static magnetism : determining the magnetic state and its dependence on the number of layers, anisotropy, as well as the presence of spatially modulated states, domains, defects, and inhomogeneities. The study of phase transitions and magnetic reversal : measuring the stability of magnetic phases, the nature of phase transitions, the process of magnetic reversal, and the role of domains and inhomogeneity therein. Understanding how to engineer 2D magnets : observing the effects of stacking, twisting, and applying electric fields to controllably induce phase transitions, magnetic reversal, magnetic texture, or new magnetic phases. The work of unravelling the mechanisms behind 2D magnetism is in its infancy. Given the inadequacy of conventional magnetic probes, we are convinced that our unique nanometer-scale magnetic field imaging and ultrasensitive torque magnetometry tools have much to contribute towards this effort. The results can be expected to have implications for 2D spintronic devices, 2D antiferromagnets, and the design of quantum materials via 2D vdW engineering in general.
Ultra high precision electron beam lithography system for nanodevice and nanostructures definition Research Project | 6 Project MembersIn the last decades nano- and quantum-science have been steadily growing in large part also thanks to the availability of ever more advanced processing, manipulation, and imaging tech-niques. Specifically, nanofabrication has been the leading enabler of experiments and devices, in which quantum mechanics play a key role. The University of Basel is nationally and internationally recognized as a leader innanoscience and nanotechnology. It was the leading house of the National Center in Competence and Re-search (NCCR) on Nanoscience, which later became the Swiss Nanoscience Institute (SNI). The University of Basel is leading the NCCR SPIN for the realization of spin qubits in Silicon and is also co-leading the NCCR QSIT on Quantum Science and Technology (with ETHZ as Leading House). The present proposal to the SNF R'Equip scheme is a joint effort of six principal investigators (PIs) in the physics department of the University of Basel, who work on current topics in quantum- and nano-science. The PIs, who submit this proposal together, do research that relies on the availability of state-of-the-art fabrication tools, such as an electron beam lithography (EBL) system. The proposal makes the case for the purchase of an ultra-high precision EBL system that combines high resolution, tunable acceleration voltages, different write-field size, ultra-high precision alignment, proximity correction, and mechanical stability. This combination is unique and crucial for the University of Basel to stay at the forefront of nano-science and technology. The system will be installed in the new clean room shared between the University of Basel and the Department of Biosystem Science and Engineering of the ETH. Therefore, the purchased system will be available for the users of the clean-room.
Scanning Nanowire Quantum Dot Research Project | 2 Project MembersIn this project we aim to combine the exceptional sensitivity of nanowire quantum dots as detectors of charge with scanning probe capabilities of customized cantilevers. The resulting scanning nanowire quantum dot will enable imaging of localized charges and electron densities with high sensitivity, high resolution, and under a large variety of environmental circumstances.
FIBsuperProbes / Focused Ion Beam fabrication of superconducting scanning Probes Research Project | 3 Project MembersOur vision is to enable a new era in scanning probe microscopy (SPM), in which nanometer-scale sensing devices - specifically superconducting devices - can be directly patterned on-tip and used to reveal new types of contrast. To realize this vision, we will use focused ion beam (FIB) techniques to produce sensors with unprecedented size, functionality, and sensitivity directly on the tips of custom-designed cantilevers. The key to this undertaking will be the unique capability of FIB to mill, grow, or structurally modify materials - especially superconductors - at the nanometer-scale and on non-planar surfaces. Our FIB-fabricated probes will include on-tip nanometer-scale Josephson junctions (JJs) and superconducting quantum interference devices (SQUIDs) for mapping magnetic fields, magnetic susceptibility, electric currents, and dissipation. Crucially, the custom-built cantilevers, on which the sensors will be patterned, will enable nanometer-scale distance control, endowing our probes with exquisite spatial resolution and simultaneous topographic contrast. The resulting imaging techniques will significantly surpass state-of-the-art SPM and help us to unravel poorly understood phenomena in physics, chemistry, and material science, which are impossible to address with today's technology.
NCCR SPIN Spin Qubits in Silicon Research Project | 11 Project MembersThe main objective of NCCR SPIN is to develop reliable, fast, compact, scalable spin qubits in silicon and germanium. The vision is to control single spins with electrical means. Fast control of individual spins can be achieved with electrical pulses via a spin-orbit interaction. The spin-orbit interaction is either inherent (hole spin) or synthetic (electron spin in a magnetic field gradient). It also allows neighbouring spins to be coupled together electrically via superconducting resonators or floating gates. The specific aim of the first phase of the project is to develop the silicon spin qubits and spin-spin coupling strategies. Beyond fundamental research on the qubits and their architecture, there are further research efforts in many related areas of quantum computing, such as quantum error correction, quantum information, quantum algorithms and software, qubit control electronics and cryo-MOS, NISQ applications and algorithms. The long term goal is fault-tolerant universal quantum computing with a large number of logical qubits. The NCCR SPIN team consists of researchers from the University of Basel , IBM Research - Zurich , ETH Zurich , and EPF Lausanne . The team members are experts from various disciplines, such as quantum physics, materials science, engineering and computer science. In addition to the collaboration between academia and industry, the NCCR SPIN is characterized by very close links between theory and experiment as well as physics, materials science and engineering. The home institution is the University of Basel .
