The Experts below are selected from a list of 62268 Experts worldwide ranked by ideXlab platform
Mark A. Eriksson - One of the best experts on this subject based on the ideXlab platform.
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Silicon Quantum Electronics
Reviews of Modern Physics, 2013Co-Authors: Floris A. Zwanenburg, Svenja Rogge, Lloyd C. l. Hollenberg, Michelle Y. Simmons, Andrea Morello, Andrew S. Dzurak, Gerhard Klimeck, Susan N. Coppersmith, Mark A. ErikssonAbstract:This review describes recent groundbreaking results in Si, Si/SiGe and dopant-based Quantum dots, and it highlights the remarkable advances in Si-based Quantum physics that have occurred in the past few years. This progress has been possible thanks to materials development for both Si Quantum devices, and thanks to the physical understanding of Quantum effects in silicon. Recent critical steps include the isolation of single electrons, the observation of spin blockade and single-shot read-out of individual electron spins in both dopants and gated Quantum dots in Si. Each of these results has come with physics that was not anticipated from previous work in other material systems. These advances underline the significant progress towards the realization of spin Quantum bits in a material with a long spin coherence time, crucial for Quantum computation and spintronics.
Floris A. Zwanenburg - One of the best experts on this subject based on the ideXlab platform.
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Silicon Quantum Electronics
Reviews of Modern Physics, 2013Co-Authors: Floris A. Zwanenburg, Svenja Rogge, Lloyd C. l. Hollenberg, Michelle Y. Simmons, Andrea Morello, Andrew S. Dzurak, Gerhard Klimeck, Susan N. Coppersmith, Mark A. ErikssonAbstract:This review describes recent groundbreaking results in Si, Si/SiGe and dopant-based Quantum dots, and it highlights the remarkable advances in Si-based Quantum physics that have occurred in the past few years. This progress has been possible thanks to materials development for both Si Quantum devices, and thanks to the physical understanding of Quantum effects in silicon. Recent critical steps include the isolation of single electrons, the observation of spin blockade and single-shot read-out of individual electron spins in both dopants and gated Quantum dots in Si. Each of these results has come with physics that was not anticipated from previous work in other material systems. These advances underline the significant progress towards the realization of spin Quantum bits in a material with a long spin coherence time, crucial for Quantum computation and spintronics.
Christophe Brun - One of the best experts on this subject based on the ideXlab platform.
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Local Josephson vortex generation and manipulation with a Magnetic Force Microscope
Nature Communications, 2019Co-Authors: Viacheslav Dremov, Sergey Yu. Grebenchuk, Andrey Shishkin, Denis Baranov, Razmik Hovhannisyan, Olga Skryabina, Nickolay Lebedev, Igor Golovchanskiy, Vladimir Chichkov, Christophe BrunAbstract:Josephson vortices play an essential role in superconducting Quantum Electronics devices. Often seen as purely conceptual topological objects, 2π-phase singularities, their observation and manipulation are challenging. Here we show that in Superconductor-Normal metal-Superconductor lateral junctions Josephson vortices have a peculiar magnetic fingerprint that we reveal in Magnetic Force Microscopy (MFM) experiments. Based on this discovery, we demonstrate the possibility of the Josephson vortex generation and manipulation by the magnetic tip of a MFM, thus paving a way for the remote inspection and control of individual nano-components of superconducting Quantum circuits.
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Two-dimensional topological superconductivity in Pb/Co/Si(111)
Nature Communications, 2016Co-Authors: Gerbold Ménard, Christophe Brun, Sébastien Guissart, François Debontridder, Dimitri Roditchev, Mircea Trif, Raphaël Leriche, Dominique Demaille, Pascal Simon, Tristan CrenAbstract:Just like insulators can host topological Dirac states at their edges, superconductors can also exhibit topological phases characterized by Majorana edge states. Remarkable zero-energy states have been recently observed at the two ends of proximity induced superconducting wires [1, 2], and were interpreted as localized Majorana end states in one-dimensional (1D) topological superconductor. By contrast, propagating Majorana states should exist at the 1D edges of two-dimensional (2D) topological superconductors. Here we report the direct observation of dispersive in-gap states surrounding topological superconducting domains made of a single atomic layer of Pb covering magnetic islands of Co/Si(111). We interpret the observed continuous dispersion across the superconducting gap in terms of a spatial topological transition accompanied by a chiral edge mode and residual gaped helical edge states. Our experimental approach enables the engineering and control of a large variety of novel Quantum phases. This opens new horizons in the field of Quantum materials and Quantum Electronics where the magnetization of the domains could be used as a control parameter for the manipulation of topological states.
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Coherent long-range magnetic bound states in a superconductor
Nature Physics, 2015Co-Authors: Gerbold C. Ménard, Christophe Brun, Sébastien Guissart, Stéphane Pons, Vasily Stolyarov, François Debontridder, Etienne Janod, Laurent Cario, Matthieu V. Leclerc, Dimitri RoditchevAbstract:Magnetic atoms embedded in a niobium selenide superconductor are shown to give rise to a long-range coherent bound state extending tens of nanometres. The Quantum coupling of fully different degrees of freedom is a challenging path towards new functionalities for Quantum Electronics^ 1 , 2 , 3 . Here we show that the localized classical spin of a magnetic atom immersed in a superconductor with a two-dimensional electronic band structure gives rise to a long-range coherent magnetic Quantum state. We experimentally evidence coherent bound states with spatially oscillating particle–hole asymmetry extending tens of nanometres from individual iron atoms embedded in a 2H–NbSe_2 crystal. We theoretically elucidate how reduced dimensionality enhances the spatial extent of these bound states and describe their energy and spatial structure. These spatially extended magnetic states could be used as building blocks for coupling coherently distant magnetic atoms in new topological superconducting phases^ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 .
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Coherent long-range magnetic bound states in a superconductor
Nature Physics, 2015Co-Authors: Gerbold C. Ménard, Christophe Brun, Sébastien Guissart, Stéphane Pons, Vasily Stolyarov, François Debontridder, Matthieu Leclerc, Etienne Janod, Laurent Cario, Dimitri RoditchevAbstract:The Quantum coupling of fully different degrees of freedom is a challenging path towards new functionalities for Quantum Electronics [1–3]. Here we show that the localized classical spin of a magnetic atom immersed in a superconductor with a two-dimensional electronic band structure gives rise to a long range coherent magnetic Quantum state. We experimentally evidence coherent bound states with spatially oscillating particle-hole asymmetry extending tens of nanometers from individual iron atoms embedded in a 2H-NbSe 2 crystal. We theoretically elucidate how reduced dimensionality enhances the spatial extent of these bound states and describe their energy and spatial structure. These spatially extended magnetic states could be used as building blocks for coupling coherently distant magnetic atoms in new topological superconducting phases [4–11].
Dimitri Roditchev - One of the best experts on this subject based on the ideXlab platform.
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Two-dimensional topological superconductivity in Pb/Co/Si(111)
Nature Communications, 2016Co-Authors: Gerbold Ménard, Christophe Brun, Sébastien Guissart, François Debontridder, Dimitri Roditchev, Mircea Trif, Raphaël Leriche, Dominique Demaille, Pascal Simon, Tristan CrenAbstract:Just like insulators can host topological Dirac states at their edges, superconductors can also exhibit topological phases characterized by Majorana edge states. Remarkable zero-energy states have been recently observed at the two ends of proximity induced superconducting wires [1, 2], and were interpreted as localized Majorana end states in one-dimensional (1D) topological superconductor. By contrast, propagating Majorana states should exist at the 1D edges of two-dimensional (2D) topological superconductors. Here we report the direct observation of dispersive in-gap states surrounding topological superconducting domains made of a single atomic layer of Pb covering magnetic islands of Co/Si(111). We interpret the observed continuous dispersion across the superconducting gap in terms of a spatial topological transition accompanied by a chiral edge mode and residual gaped helical edge states. Our experimental approach enables the engineering and control of a large variety of novel Quantum phases. This opens new horizons in the field of Quantum materials and Quantum Electronics where the magnetization of the domains could be used as a control parameter for the manipulation of topological states.
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Coherent long-range magnetic bound states in a superconductor
Nature Physics, 2015Co-Authors: Gerbold C. Ménard, Christophe Brun, Sébastien Guissart, Stéphane Pons, Vasily Stolyarov, François Debontridder, Etienne Janod, Laurent Cario, Matthieu V. Leclerc, Dimitri RoditchevAbstract:Magnetic atoms embedded in a niobium selenide superconductor are shown to give rise to a long-range coherent bound state extending tens of nanometres. The Quantum coupling of fully different degrees of freedom is a challenging path towards new functionalities for Quantum Electronics^ 1 , 2 , 3 . Here we show that the localized classical spin of a magnetic atom immersed in a superconductor with a two-dimensional electronic band structure gives rise to a long-range coherent magnetic Quantum state. We experimentally evidence coherent bound states with spatially oscillating particle–hole asymmetry extending tens of nanometres from individual iron atoms embedded in a 2H–NbSe_2 crystal. We theoretically elucidate how reduced dimensionality enhances the spatial extent of these bound states and describe their energy and spatial structure. These spatially extended magnetic states could be used as building blocks for coupling coherently distant magnetic atoms in new topological superconducting phases^ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 .
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Coherent long-range magnetic bound states in a superconductor
Nature Physics, 2015Co-Authors: Gerbold C. Ménard, Christophe Brun, Sébastien Guissart, Stéphane Pons, Vasily Stolyarov, François Debontridder, Matthieu Leclerc, Etienne Janod, Laurent Cario, Dimitri RoditchevAbstract:The Quantum coupling of fully different degrees of freedom is a challenging path towards new functionalities for Quantum Electronics [1–3]. Here we show that the localized classical spin of a magnetic atom immersed in a superconductor with a two-dimensional electronic band structure gives rise to a long range coherent magnetic Quantum state. We experimentally evidence coherent bound states with spatially oscillating particle-hole asymmetry extending tens of nanometers from individual iron atoms embedded in a 2H-NbSe 2 crystal. We theoretically elucidate how reduced dimensionality enhances the spatial extent of these bound states and describe their energy and spatial structure. These spatially extended magnetic states could be used as building blocks for coupling coherently distant magnetic atoms in new topological superconducting phases [4–11].
Gerhard Klimeck - One of the best experts on this subject based on the ideXlab platform.
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Silicon at the fundamental scaling limit-atomic-scale donor-based Quantum Electronics
2014 Silicon Nanoelectronics Workshop (SNW), 2014Co-Authors: Bent Weber, Suddhasatta Mahapatra, Thomas F. Watson, Rajib Rahman, Lloyd C. l. Hollenberg, Gerhard Klimeck, Michelle Y. SimmonsAbstract:On the route to scalability in donor-based Quantum computing architectures, we report on recent advances in the atomic-precision engineering of donor-based electronic devices in silicon, fabricated by STM hydrogen lithography, gas-phase δ-doping, and silicon homoepitaxy [1-3].
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Silicon Quantum Electronics
Reviews of Modern Physics, 2013Co-Authors: Floris A. Zwanenburg, Svenja Rogge, Lloyd C. l. Hollenberg, Michelle Y. Simmons, Andrea Morello, Andrew S. Dzurak, Gerhard Klimeck, Susan N. Coppersmith, Mark A. ErikssonAbstract:This review describes recent groundbreaking results in Si, Si/SiGe and dopant-based Quantum dots, and it highlights the remarkable advances in Si-based Quantum physics that have occurred in the past few years. This progress has been possible thanks to materials development for both Si Quantum devices, and thanks to the physical understanding of Quantum effects in silicon. Recent critical steps include the isolation of single electrons, the observation of spin blockade and single-shot read-out of individual electron spins in both dopants and gated Quantum dots in Si. Each of these results has come with physics that was not anticipated from previous work in other material systems. These advances underline the significant progress towards the realization of spin Quantum bits in a material with a long spin coherence time, crucial for Quantum computation and spintronics.
