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arXiv · 1507.04712

Thermoelectric Signatures of Time-Reversal Symmetry Breaking States in Multiband Superconductors

Julien Garaud·Mihail Silaev·Egor Babaev
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Abstract

We show that superconductors with broken time-reversal symmetry have very specific magnetic and electric responses to inhomogeneous heating. A local heating of such superconductors induces a magnetic field with a profile that is sensitive to the presence of domain walls and crystalline anisotropy of superconducting states. A nonstationary heating process produces an electric field and a charge imbalance in different bands. These effects can be measured and used to distinguish $s+is$ and $s+id$ superconducting states in the candidate materials such as Ba$_{1-x}$K$_x$Fe$_2$As$_2$.

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Julien Garaud, Mihail Silaev, Egor Babaev. 2016-03-17. Thermoelectric Signatures of Time-Reversal Symmetry Breaking States in Multiband Superconductors. https://doi.org/10.1103/physrevlett.116.097002

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