Possible Three-Dimensional Nematic Odd-Parity Superconductivity in Sr2RuO4

Wen Huang; Hong Yao

doi:10.1103/PhysRevLett.121.157002

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Possible Three-Dimensional Nematic Odd-Parity Superconductivity in Sr2RuO4

Wen Huang, Hong Yao

DOI 10.1103/PhysRevLett.121.157002 · Physical Review Letters

T1

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Abstract

The superconducting pairing in Sr2RuO4 is widely considered to be chiral p wave with d→k∼(kx+iky)z^, which belongs to the Eu representation of the crystalline D4h group. However, this superconducting order appears hard to reconcile with a number of key experiments. In this Letter, based on symmetry analysis we discuss the possibility of odd-parity pairing with inherent three-dimensional character enforced by the interorbital interlayer coupling and the sizable spin-orbit coupling in the material. We focus on a yet unexplored Eu pairing, which contains finite (kzx^, kzy^) component in the gap function. Under appropriate circumstances a novel time-reversal invariant nematic pairing can be realized. This nematic superconducting state could make contact with some puzzling observations on Sr2RuO4, such as the absence of spontaneous edge current and no evidence of split transitions under uniaxial strains.

Source-reported materials — not catalogue approval

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