Anomalous diamagnetic response in multiband superconductors with broken time-reversal symmetry
| Autor: | Y. S. Yerin, Jeroen van den Brink, Dimitri V. Efremov, A. N. Omelyanchouk, Stefan-Ludwig Drechsler |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Degenerate energy levels 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic flux Magnetic field T-symmetry Condensed Matter::Superconductivity Excited state 0103 physical sciences Diamagnetism 010306 general physics 0210 nano-technology Ground state |
| Zdroj: | Physical Review B. 96 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.96.144513 |
| Popis: | 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 multi-band 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 non-adiabatic 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|