Unconventional thermoelectric effect in superconductors that break time-reversal symmetry

Mihail Silaev; Julien Garaud; Egor Babaev

doi:10.1103/PhysRevB.92.174510

← Back to search

Unconventional thermoelectric effect in superconductors that break time-reversal symmetry

Mihail Silaev, Julien Garaud, Egor Babaev

DOI 10.1103/PhysRevB.92.174510 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We demonstrate that superconductors that 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 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 Ba1−xKxFe2As2 and stoichiometric LiFeAs.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Ba1-xKxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
LiFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown