Quantum phase transitions in d-wave superconductors |
| |
Authors: | Vojta Zhang Sachdev |
| |
Institution: | Department of Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520-8120, USA. |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|