DataVXACS NanoPaper
journal article·2023-06-27Open access

Epitaxially Driven Phase Selectivity of Sn in Hybrid Quantum Nanowires

Sabbir A. Khan, Sara Martí-Sánchez, Dags Olsteins, Charalampos Lampadaris, Damon James Carrad, Yu Liu, Judith Quiñones, Maria Chiara Spadaro, Thomas Sand Jespersen, Peter Krogstrup, Jordi Arbiol

ACS Nano· Volume 17· Issue 12
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Source abstract

Abstract

Hybrid semiconductor-superconductor nanowires constitute a pervasive platform for studying gate-tunable superconductivity and the emergence of topological behavior. Their low dimensionality and crystal structure flexibility facilitate unique heterostructure growth and efficient material optimization, crucial prerequisites for accurately constructing complex multicomponent quantum materials. Here, we present an extensive study of Sn growth on InSb, InAsSb, and InAs nanowires and demonstrate how the crystal structure of the nanowires drives the formation of either semimetallic α-Sn or superconducting β-Sn. For InAs nanowires, we observe phase-pure superconducting β-Sn shells. However, for InSb and InAsSb nanowires, an initial epitaxial α-Sn phase evolves into a polycrystalline shell of coexisting α and β phases, where the β/α volume ratio increases with Sn shell thickness. Whether these nanowires exhibit superconductivity or not critically relies on the β-Sn content. Therefore, this work provides key insights into Sn phases on a variety of semiconductors with consequences for the yield of superconducting hybrids suitable for generating topological systems.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Topological Materials and Phenomena · 2D Materials and Applications · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

Danish Fundamental Metrology, Kogle Alle 5, 2970 Ho̷rsholm, Denmark

Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain

Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, Building, Lyngby, 310, 2800 Denmark

NNF Quantum Computing Programme, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark

ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Catalonia, Spain

Funding

Consejo Superior de Investigaciones Cient?ficas · European Commission · Agencia Estatal de Investigaci?n · Microsoft · Ministerio de Ciencia e Innovaci?n · European Regional Development Fund · Ministerio de Econom?a y Competitividad · Ag?ncia de Gesti? d'Ajuts Universitaris i de Recerca · H2020 Marie Sklodowska-Curie Actions · H2020 European Research Council · Danish Agency for Higher Education and Science

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