Ground state of the three-dimensional BCS d -wave superconductor

We determine the mean-field ground state of the three-dimensional rotationally symmetric d-wave (ℓ=2) superconductor at weak coupling. It is a noninert state, invariant under the symmetry C2 only, which breaks time-reversal symmetry almost maximally, and features a high but again less-than-maximal a...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B 2019-09, Vol.100 (10), Article 104503
Main Authors: Herbut, Igor F., Boettcher, Igor, Mandal, Subrata
Format: Article
Language:English
Subjects:
Coupling
Energy conservation
Free energy
Ground state
Symmetry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We determine the mean-field ground state of the three-dimensional rotationally symmetric d-wave (ℓ=2) superconductor at weak coupling. It is a noninert state, invariant under the symmetry C2 only, which breaks time-reversal symmetry almost maximally, and features a high but again less-than-maximal average magnetization. The state obtained by minimization of the expanded sixth-order Ginzburg–Landau free energy is found to be an excellent approximation to the true ground state. The coupling to a parasitic s-wave component has only a minuscule quantitative and no qualitative effect on the ground state.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.100.104503