Zero-Energy Modes from Coalescing Andreev States in a Two-Dimensional Semiconductor-Superconductor Hybrid Platform - INSPIRE

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Zero-Energy Modes from Coalescing Andreev States in a Two-Dimensional Semiconductor-Superconductor Hybrid Platform

Mar 10, 2017

5 pages

Published in:

Phys.Rev.Lett. 119 (2017) 17, 176805

Published: Oct 26, 2017

e-Print:

1703.03699 [cond-mat.mes-hall]

DOI:

10.1103/PhysRevLett.119.176805

Report number:

QDEV-NBI-2017

View in:

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Abstract: (APS)

We investigate zero-bias conductance peaks that arise from coalescing subgap Andreev states, consistent with emerging Majorana zero modes, in hybrid semiconductor-superconductor wires defined in a two-dimensional InAs/Al heterostructure using top-down lithography and gating. The measurements indicate a hard superconducting gap, ballistic tunneling contact, and in-plane critical fields up to 3 T. Top-down lithography allows complex geometries, branched structures, and straightforward scaling to multicomponent devices compared to structures made from assembled nanowires.

Note:

Includes Supplementary Material

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