Nonreciprocal Meissner response in parity-mixed superconductors
Hikaru Watanabe, Akito Daido, Youichi Yanase
DOI 10.1103/PhysRevB.105.L100504 · Physical Review B
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Abstract
Parity breaking gives rise to rich superconducting properties through the admixture of even- and odd-parity Cooper pairs. New light has been shed on parity-breaking superconductors by recent observations of nonreciprocal responses such as nonlinear optical responses and the superconducting diode effect. In this Letter, we demonstrate that nonreciprocal responses are characterized by a unidirectional correction to the superfluid density, which we call nonreciprocal superfluid density. This correction leads to the nonreciprocal Meissner effect, namely, the asymmetric screening of magnetic fields due to the nonreciprocal magnetic penetration depth. Performing a microscopic analysis of an exotic superconductor UTe2 and examining the temperature dependence and renormalization effect, we show that the nonreciprocal Meissner effect is useful to probe parity-mixing properties and gap structures in superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| UTe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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