Selective-Area-Grown Semiconductor-Superconductor Hybrids : A Basis for Topological Networks
| Autor: | Peter Krogstrup, Alexander M. Whiticar, Chris Palmstrom, Charles Marcus, Sara Martí-Sánchez, Joachim E. Sestoft, Jordi Arbiol, Lucas Casparis, Mingtang Deng, S. Vaitiekėnas, Filip Krizek |
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| Přispěvatelé: | Danish National Research Foundation, European Commission, Villum Fonden, State Key Laboratory of Satellite Ocean Environment Dynamics (China), La Caixa, Generalitat de Catalunya, Ministerio de Economía y Competitividad (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Nanowire
FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Parallel magnetic field Topology 01 natural sciences Superconductivity (cond-mat.supr-con) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Coulomb Coherence lengths 010306 general physics Peak spacing Superconductivity Physics Coupling Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity Materials Science (cond-mat.mtrl-sci) Coulomb blockade 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Coherence length Magnetic field Loop networks Spin-orbit couplings Temperature dependent Topological networks Selective areas 0210 nano-technology Molecular beam epitaxy |
| Zdroj: | Physical Review Letters Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2013-0295 |
| Popis: | We introduce selective area grown hybrid InAs/Al nanowires based on molecular beam epitaxy, allowing arbitrary semiconductor-superconductor networks containing loops and branches. Transport reveals a hard induced gap and unpoisoned 2e-periodic Coulomb blockade, with temperature dependent 1e features in agreement with theory. Coulomb peak spacing in parallel magnetic field displays overshoot, indicating an oscillating discrete near-zero subgap state consistent with device length. Finally, we investigate a loop network, finding strong spin-orbit coupling and a coherence length of several microns. These results demonstrate the potential of this platform for scalable topological networks among other applications. The research was supported by Microsoft, the Danish National Research Foundation, and the European Commission. C. M. M. acknowledges support from the Villum Foundation. M. T. D. acknowledges support from State Key Laboratory of High Performance Computing, China. S. M.-S. acknowledges funding from “Programa Internacional de Becas ‘la Caixa’- Severo Ochoa.” ICN2 acknowledges support from the Severo Ochoa Programme (MINECO, Grant No. SEV2013-0295) and is funded by the CERCA Programme/Generalitat de Catalunya. |
| Databáze: | OpenAIRE |
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