2014/08/07 by Vlad S. Pribiag, Vlad Pribiag, Arjan J. A. Beukman +6 · 1 citation
Materials Science · Physics and Astronomy · #Condensed matter physics #Graphene research and applications #MAJORANA #Physics #Quantum #Quantum many-body systems #Quantum mechanics #Superconductivity #Topological Materials and Phenomena #Topological insulator #Topological order #Topological quantum computer #Topology (electrical circuits) #Zero mode #cond-mat.mes-hall
paper · pdf · doi:10.1038/nnano.2015.86
19 pages, 17 figures
arxiv created 2014/08/07 · openalex publication_date 2015/05/11 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Topological superconductivity is an exotic state of matter that supports Majorana zero-modes, which are surface modes in 3D, edge modes in 2D or localized end states in 1D. In the case of complete localization these Majorana modes obey non-Abelian exchange statistics making them interesting building blocks for topological quantum computing. Here we report superconductivity induced into the edge modes of semiconducting InAs/GaSb quantum wells, a two-dimensional topological insulator. Using superconducting quantum interference, we demonstrate gate-tuning between edge-dominated and bulk-dominated regimes of superconducting transport. The edge-dominated regime arises only under conditions of high-bulk resistivity, which we associate with the 2D topological phase. These experiments establish InAs/GaSb as a robust platform for further confinement of Majoranas into localized states enabling future investigations of non-Abelian statistics.