Induced superconductivity in selective-area grown SnTe devices
Abstract
Topological superconductors are of high interest for applications in topological quantum computation. The required topologically superconducting state can be engineered by proximityinducing superconductivity in a topological insulator. Here, we explore the induced superconductivity in selective-area grown nanowires of the topological crystalline insulator SnTe on a InP substrate, through TEM/EDX and low-temperature electronic transport studies. The observed superconducting behavior likely originates from indium in the substrate diffusing upwards into the SnTe nanowire, forming a thin layer of InxSn1-xTe at the interface between the nanowire and the substrate. InxSn1-xTe is intrinsically superconducting for indium concentrations above 2%, resulting in superconductivity within the heterostructure. Little-Parks oscillations are observed in loop-shaped nanowire networks in an out-of-plane magnetic field. The half-period shift indicative of a topological superconducting state is absent, which is explained by dominant trivial transport channels obscuring any topological signatures.
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BibTeX
@misc{kamphuis2026induced,
title = {{Induced superconductivity in selective-area grown SnTe devices}},
author = {Maarten J. G. Kamphuis and Yoran F. S. Starmans and Pim J. H. Lueb and Femke J. Witmans and Marvin M. Jansen-Zilles and Marcel A. Verheijen and Reinoud Lavrijsen and Joost Ridderbos and Fabrizio Nichele and Floris A. Zwanenburg and Erik P. A. M. Bakkers and Alexander Brinkman},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.15778},
eprint = {2609.15778},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.15778},
}
RIS
TY - UNPB
TI - Induced superconductivity in selective-area grown SnTe devices
AU - Maarten J. G. Kamphuis
AU - Yoran F. S. Starmans
AU - Pim J. H. Lueb
AU - Femke J. Witmans
AU - Marvin M. Jansen-Zilles
AU - Marcel A. Verheijen
AU - Reinoud Lavrijsen
AU - Joost Ridderbos
AU - Fabrizio Nichele
AU - Floris A. Zwanenburg
AU - Erik P. A. M. Bakkers
AU - Alexander Brinkman
PY - 2026
DA - 2026/09/14
PB - arXiv
DO - 10.48550/arxiv.2609.15778
UR - https://arxiv.org/abs/2609.15778
AB - Topological superconductors are of high interest for applications in topological quantum computation. The required topologically superconducting state can be engineered by proximityinducing superconductivity in a topological insulator. Here, we explore the induced superconductivity in selective-area grown nanowires of the topological crystalline insulator SnTe on a InP substrate, through TEM/EDX and low-temperature electronic transport studies. The observed superconducting behavior likely originates from indium in the substrate diffusing upwards into the SnTe nanowire, forming a thin layer of InxSn1-xTe at the interface between the nanowire and the substrate. InxSn1-xTe is intrinsically superconducting for indium concentrations above 2%, resulting in superconductivity within the heterostructure. Little-Parks oscillations are observed in loop-shaped nanowire networks in an out-of-plane magnetic field. The half-period shift indicative of a topological superconducting state is absent, which is explained by dominant trivial transport channels obscuring any topological signatures.
ER -