2020/07/28 by Olesia Dmytruk, Daniel Loss, Jelena Klinovaja · 1 citation
Physics and Astronomy · #Andreev reflection #Bound state #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Heterojunction #Magnetic field #Physics #Quantum and electron transport phenomena #Quantum mechanics #Semiconductor #Superconductivity #Topological Materials and Phenomena #Zeeman effect #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.102.245431
published as Phys. Rev. B 102, 245431 (2020) · 6 pages, 5 figures
arxiv created 2020/07/28 · openalex publication_date 2020/12/29 · arxiv updated 2021/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider a two-dimensional electron gas (2DEG) with Rashba spin-orbit interaction (SOI) partially covered by an s-wave superconductor, where the uncovered region remains normal but is exposed to a perpendicular Zeeman field. We find analytically and numerically Andreev bound states (ABSs) formed in the normal region and show that, by tuning the SOI to certain values, one can reach a regime where the energy of the lowest ABS becomes pinned close to zero as a function of Zeeman field. In addition, we also consider a configuration with a superconducting vortex and find again ABSs pinned close to zero energy in the topologically trivial phase for a wide range of parameters. Thus, ABSs and Majorana bound states show similar behavior in such structures.