Manifestare neaşteptată concomitentă a supraconductibilităţii şi feromagnetismului slab la interfeţele bicristalelor de Bi şi a izolatorilor topologici tridimensionali BiSb

Abstract

Two/one superconducting phases with the onset of transition ≤ 36K are observed at CIs of bicrystals, while the rhombohedral Bi and 3D topological insulator (3DTI) BiSb are diamagnetic and do not exhibit superconductivity. In large crystallite disorientation angle Bi-Sb interfaces both superconductivity and weak ferromagnetism were revealed simultaneously.