Open AccessVarious manifestations of weak magnetism and superconductivity in inclination interfaces of Bi, Sb and Bi1-xSbx
Author(s) -
F. M. Muntyanu,
AUTHOR_ID,
K. Nenkov,
Andrzej J. Zalesk,
E. Condrea,
V. Chistol,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2022
Publication title -
moldavian journal of the physical sciences
Language(s) - English
Resource type - Journals
eISSN - 2537-6365
pISSN - 1810-648X
DOI - 10.53081/mjps.2021.20-2.03
Subject(s) - condensed matter physics , superconductivity , diamagnetism , magnetism , ferromagnetism , paramagnetism , spintronics , topological insulator , magnetic hysteresis , materials science , hysteresis , physics , magnetization , magnetic field , quantum mechanics
The magnetic properties of the nano-width bicrystal interfaces (CIs) of Bi, Sb and 3D topological insulator Bi1xSbx (0.06 ≤ x ≤ 0.2) are studied in a temperature range of 1.6–300 K. These materials do not show superconductivity under normal rhombohedral conditions and are anomalous diamagnetics. At the same time, two superconducting phases with Tc ≤ 21 K and magnetic hysteresis loops against a diamagnetic background typical for strong type II superconductors are identified in Bi interfaces. At the CIs of Bi1xSbx (0.06 ≤ x ≤ 0.2), as well as Sb, a superconducting transition and a ferromagnetic hysteresis loop or a dual loop (superimposed ferromagnetic and superconducting loops) against a paramagnetic background are observed; they indicate the simultaneous occurrence of superconductivity and weak ferromagnetism, which is specific to 3D topological insulators. The revealed coexistence of superconductivity and weak magnetism at these CIs is of significant interest for the fundamental physics and future applications in quantum computing and spintronic devices.