2019/07/31 by Igor F. Herbut, Igor Boettcher, Subrata Mandal
Mathematics · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Geometry #Ginzburg–Landau theory #Ground state #Invariant (physics) #Magnetic field #Magnetization #Materials science #Mathematical physics #Mathematics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #State (computer science) #Superconductivity #Symmetry (geometry) #Topological Materials and Phenomena #cond-mat.quant-gas #cond-mat.stat-mech #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.100.104503
published as Phys. Rev. B 100, 104503 (2019) · 6 revtex pages; typos corrected, references updated and added, close to published version
openalex publication_date 2019/09/04 · arxiv created 2019/09/07 · arxiv updated 2019/09/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We determine the mean-field ground state of the three-dimensional rotationally symmetric d-wave (\ensuremathℓ=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.