Giant Nernst and Hall effects due to chiral superconducting fluctuations

Hiroaki Sumiyoshi; Satoshi Fujimoto

doi:10.1103/PhysRevB.90.184518

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Giant Nernst and Hall effects due to chiral superconducting fluctuations

Hiroaki Sumiyoshi, Satoshi Fujimoto

DOI 10.1103/PhysRevB.90.184518 · Physical Review B

T1

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Abstract

We consider the Nernst and Hall effects in the fluctuation regime of chiral superconductors above transition temperatures, that are raised not by the conventional Lorentz force but by a mechanism that is an analog of the anomalous Nernst or Hall effects, i.e., asymmetric scattering due to chiral superconducting fluctuations. It is found that these effects can be gigantic for cleaner samples compared to conventional ones, exhibiting qualitatively distinct behavior. The results provide systematic and comprehensive understanding for recent experimental observations of the Nernst effect in a clean URu2Si2 sample, which is suggested to be a chiral superconductor.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
URu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown