Unconventional thermoelectric effect in superconductors that break time-reversal symmetry

Abstract

We demonstrate that superconductors which break time-reversal symmetry can exhibit thermoelectric properties, which are entirely different from the Ginzburg mechanism. As an example, we show that in the $s+is$ superconducting state there is a reversible contribution to thermally induced supercurrent, whose direction is not invariant under time-reversal operation. Moreover in contrast to Ginzburg's mechanism it has a singular behavior near the time-reversal symmetry breaking phase transition. The effect can be used to confirm or rule out the $s+is$ state, which is widely expected to be realized in pnictide compounds Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ and stoichiometric LiFeAs.

8 pages, 4 figures

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Cited by in corpus (17)

• Quartic metal: Spontaneous breaking of time-reversal symmetry due to four-fermion correlations in Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Distinguishing between $s+id$ and $s+is$ pairing symmetries in multiband superconductors through spontaneous magnetization pattern induced by a defect
• Thermoelectric Signatures of Time-Reversal Symmetry Breaking States in Multiband Superconductors
• Type-1.5 superconductivity in multicomponent systems
• Microscopically derived multi-component Ginzburg-Landau theories for $s+is$ superconducting state
• Properties of dirty two-bands superconductors with repulsive interband interaction: normal modes, length scales, vortices and magnetic response
• Prediction of time-reversal-symmetry breaking fermionic quadrupling condensate in twisted bilayer graphene
• Non-London electrodynamics in a multiband London model: anisotropy-induced non-localities and multiple magnetic field penetration lengths
• Phase diagram of dirty two-band superconductors and observability of impurity-induced $s+is$ state
• Polarization of spontaneous magnetic field and magnetic fluctuations in $s+is$ anisotropic multiband superconductors
• Spin-dependent thermoelectric effects in graphene based superconductor junctions
• Phase solitons in a weakly coupled three-component superconductor
• Magnetic signatures of domain walls in $s+is$ and $s+id$ superconductors: observability and what that can tell us about the superconducting order parameter
• Effective model and Magnetic Properties of the Resistive Electron Quadrupling State
• Skyrmionic chains and lattices in $s+id$ superconductors
• Magnetic field behaviour in $s+is$ and $s+id$ superconductors: twisting of applied and spontaneous fields
• Topological order in higher composites