2020/07/31 by Satoshi Ikegaya, Shun Tamura, Shinya Tamura +2
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Bound state #Condensed matter physics #Cooper pair #Electron-beam lithography #Josephson effect #MAJORANA #Materials science #Mathematics #Nanotechnology #Physics #Physics of Superconductivity and Magnetism #Pi Josephson junction #Proximity effect (electron beam lithography) #Quantum mechanics #Superconductivity #Supercurrent #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.102.140505
published as Phys. Rev. B 102, 140505 (2020) · 10 pages, 6 figures
openalex created_date 2020/07/29 · arxiv created 2020/10/16 · openalex publication_date 2020/10/29 · arxiv updated 2020/11/04 · openalex updated_date 2026/08/06
The anomalous proximity effect in dirty superconducting junctions is one of most striking phenomena highlighting the profound nature of Majorana bound states and odd-frequency Cooper pairs in topological superconductors. Motivated by the recent experimental realization of planar topological Josephson junctions, we describe the anomalous proximity effect in a superconductor/semiconductor hybrid, where an additional dirty normal-metal segment is extended from a topological Josephson junction. The topological phase transition in the topological Josephson junction is accompanied by a drastic change in the low-energy transport properties of the attached dirty normal metal. The quantization of the zero-bias differential conductance, which appears only in the topologically nontrivial phase, is caused by the penetration of the Majorana bound states and odd-frequency Cooper pairs into a dirty normal-metal segment. As a consequence, we propose a practical experiment for observing the anomalous proximity effect.