2017/07/07 by Y. Yerin, Yuriy Yerin, A. Omelyanchouk +7
Materials Science · Physics and Astronomy · #Adiabatic process #Advanced Condensed Matter Physics #Condensed matter physics #Degenerate energy levels #Diamagnetism #Excited state #Ground state #Iron-based superconductors research #Magnetic field #Magnetic flux #Metastability #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Symmetry (geometry) #Symmetry breaking #T-symmetry #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.96.144513
published as Phys. Rev. B 96, 144513 (2017) · 7 pages, 7 figures
arxiv created 2017/07/07 · openalex created_date 2017/07/21 · openalex publication_date 2017/10/27 · arxiv updated 2017/12/05 · openalex updated_date 2026/08/05
Within a Ginzburg-Landau formalism we establish analytically the necessary and sufficient conditions to realize a doubly degenerate superconducting ground state with broken time-reversal symmetry (BTRS) in a multiband superconductor. Using these results we analyze the ground state of a three-band superconductor in the cylindrical geometry in an external magnetic field. We show that depending on the interband coupling constants, a magnetic flux can induce current density jumps in such superconducting geometries that are related to adiabatic or nonadiabatic transitions from BTRS to time-reversal-symmetric states and vice versa. This unusual current-induced magnetic flux response can in principle be used experimentally to detect superconducting BTRS ground states as well as corresponding metastable excited states.