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Proximity Effect Transfer from NbTi into a Semiconductor Heterostructure via Epitaxial Aluminum
A. C. C. Drachmann, H. J. Suominen, M. Kjaergaard +4
We demonstrate the transfer of the superconducting properties of NbTi---a large-gap high-critical-field superconductor---into an InAs heterostructure via a thin intermediate layer…
Anomalous Fraunhofer Interference in Epitaxial Superconductor-Semiconductor Josephson Junctions
H. J. Suominen, J. Danon, M. Kjaergaard +5
We investigate patterns of critical current as a function of perpendicular and in-plane magnetic fields in superconductor-semiconductor-superconductor (SNS) junctions based on InAs…
Transparent Semiconductor-Superconductor Interface and Induced Gap in an Epitaxial Heterostructure Josephson Junction
M. Kjaergaard, H. J. Suominen, M. P. Nowak +5
Measurement of multiple Andreev reflection (MAR) in a Josephson junction made from an InAs heterostructure with epitaxial aluminum is used to quantify the highly transparent semico…
Decoupling edge versus bulk conductance in the trivial regime of an InAs/GaSb double quantum well using Corbino ring geometry
Binh-Minh Nguyen, Andrey A. Kiselev, Ramsey Noah +13
A Corbino ring geometry is utilized to analyze edge and bulk conductance of InAs/GaSb quantum well structures. We show that edge conductance exists in the trivial regime of this th…
Giant spin-orbit splitting in inverted InAs/GaSb double quantum wells
Fabrizio Nichele, Morten Kjaergaard, Henri J. Suominen +11
Transport measurements in inverted InAs/GaSb quantum wells reveal a giant spin-orbit splitting of the energy bands close to the hybridization gap. The splitting results from the in…
Quantized conductance doubling and hard gap in a two-dimensional semiconductor-superconductor heterostructure
M. Kjaergaard, F. Nichele, H. J. Suominen +8
The prospect of coupling a two-dimensional (2D) semiconductor heterostructure to a superconductor opens new research and technology opportunities, including fundamental problems in…