Selective-Area-Grown Semiconductor-Superconductor Hybrids : A Basis for Topological Networks
Vaitiekenas, Saulius (University of Copenhagen)
Whiticar, A. M. (University of Copenhagen)
Deng, M. T. (University of Copenhagen)
Krizek, Filip (University of Copenhagen)
Sestoft, Joachim E. (University of Copenhagen)
Palmstrøm, C. J. (University of California. Materials Department)
Martí-Sánchez, Sara (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Krogstrup, Peter (University of Copenhagen)
Casparis, Lucas (University of Copenhagen)
Marcus, Charles M. (University of Copenhagen)

Date:	2018
Abstract:	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.
Grants:	Ministerio de Economía y Competitividad SEV-2013-0295
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Coherence lengths ; Loop networks ; Parallel magnetic field ; Peak spacing ; Selective areas ; Spin-orbit couplings ; Temperature dependent ; Topological networks
Published in:	Physical review letters, Vol. 121, Issue 14 (October 2018) , art. 147701, ISSN 1079-7114

DOI: 10.1103/PhysRevLett.121.147701
PMID: 30339420

Preprint 8 p, 627.7 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles