Time-reversal symmetry breaking in superconductors through loop Josephson-current order

Ghosh, Sudeep K., Annett, James F., Quintanilla, Jorge (2018) Time-reversal symmetry breaking in superconductors through loop Josephson-current order. arXiv, .

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Official URL
https://arxiv.org/abs/1803.02618

Abstract

We propose a superconducting instability where loop Josephson-currents form spontaneously within a unit cell at the critical temperature, T c . Such currents break time-reversal symmetry (TRS) without needing an unconventional pairing mechanism. Using Ginzburg-Landau theory we show how they emerge in a toy model and estimate the size of the resulting magnetization, which is consistent with recent muon-spin relaxation experiments. We discuss the crystal symmetry re- quirements and show that they are met by the Re 6 X (X=Zr, Hf, Ti) family of TRS-breaking, but otherwise seemingly conventional, superconductors.

Item Type: Article
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science
Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Jorge Quintanilla
Date Deposited: 13 Oct 2018 23:50 UTC
Last Modified: 29 May 2019 21:17 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/69551 (The current URI for this page, for reference purposes)
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