2000/07/31 by Matthias Vojta, Ying Zhang, Subir Sachdev · 14 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.85.4940
published as Phys. Rev. Lett. 85, 4940 (2000) · 4 pages, 1 figure, final version as published; (v3) added erratum noting that state G breaks time-reversal symmetry, carries spontaneous currents, and possesses Fermi surface pockets
openalex publication_date 2000/12/04 · arxiv created 2008/01/24 · arxiv updated 2009/11/30 · openalex created_date 2020/05/13 · openalex updated_date 2026/07/28
Motivated by the strong, low temperature damping of nodal quasiparticles observed in some cuprate superconductors, we study quantum phase transitions in d(x(2)-y(2)) superconductors with a spin-singlet, zero momentum, fermion bilinear order parameter. We present a complete, group-theoretic classification of such transitions into seven distinct cases (including cases with nematic order) and analyze fluctuations by the renormalization group. We find that only two, the transitions to d(x(2)-y(2))+is and d(x(2)-y(2))+id(xy) pairing, possess stable fixed points with universal damping of nodal quasiparticles; the latter leaves the gapped quasiparticles along (1,0), (0,1) essentially undamped.