$H$-$T$ Phase Diagram of Multi-component Superconductors with Frustrated Inter-component Couplings
Abstract
Multi-band superconductors in which frustrated inter-band couplings yield a time-reversal-symmetry breaking (TRSB) state are investigated. Stability condition for the TRSB state are derived based on the Bardeen-Cooper-Schrieffer (BCS) theory. With the time-dependent Ginzburg-Landau (GL) method, vortex states are investigated first at the vicinity of critical temperature where the GL theory is valid, and the results are extended to compose the - phase diagram. When material parameters satisfy the condition that the nucleation field is slightly larger than the thermodynamic field () derived in a previous work (X. Hu and Z. Wang, Phys. Rev. B 85, 064516 (2012)), an unconventional intermediate state characterized by clustering vortices appears. Calculation of interface energy reveals that the clustering vortices are associated with positive interface energy.
Keywords
Cite
@article{arxiv.1309.1570,
title = {$H$-$T$ Phase Diagram of Multi-component Superconductors with Frustrated Inter-component Couplings},
author = {Y. Takahashi and Z. Huang and X. Hu},
journal= {arXiv preprint arXiv:1309.1570},
year = {2015}
}
Comments
9 pages, 5 figures