Hybridization of Subgap States in One-Dimensional Superconductor-Semiconductor Coulomb Islands
Research output: Contribution to journal › Article
We present measurements of one-dimensional superconductor-semiconductor Coulomb islands, fabricated by gate confinement of a two-dimensional InAs heterostructure with an epitaxial Al layer. When tuned via electrostatic side gates to regimes without subgap states, Coulomb blockade reveals Cooper-pair mediated transport. When subgap states are present, Coulomb peak positions and heights oscillate in a correlated way with magnetic field and gate voltage, as predicted theoretically, with (anti)crossings in (parallel) transverse magnetic field indicating Rashba-type spin-orbit coupling. Overall results are consistent with a picture of overlapping Majorana zero modes in finite wires.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||Physical Review Letters|
|State||Published - 2018 Dec 19|