Year: 2020
Type: article
Abstract: Spin-orbit coupling (SOC) plays a crucial role in determining the spin structure of an odd parity psedospin-triplet Cooper pairing state. Here, we present a thorough study of how SOC lifts the degeneracy among different $p$-wave pseudospin-triplet pairing states in a widely used microscopic model for ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$, combining a Ginzburg-Landau (GL) free energy expansion, a symmetry analysis of the model, and numerical weak-coupling renormalization group (RG) and random phase approximation (RPA) calculations. These analyses are then used to critically re-examine previous numerical results on the stability of chiral $p$-wave pairing. The symmetry analysis can serve as a guide for future studies, especially numerical calculations, on the pairing instability in ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ and can be useful for studying other multiband spin-triplet superconductors where SOC plays an important role.
Authors: Zhiqiang Wang, Xin Wang, Catherine Kallin
Institutions: University of Chicago, McMaster University
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2986423348