Theory of the Nodal Nematic Quantum Phase Transition in Superconductors
Lawler, Michael J.
Kivelson, Steven A.
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CitationKim, Eun-Ah, Michael J. Lawler, Paul Oreto, Subir Sachdev, Eduardo Fradkin, and Steven A. Kivelson. 2008. Theory of the nodal nematic quantum phase transition in superconductors. Physical Review B 77(18): 184514.
AbstractWe study the character of an Ising nematic quantum phase transition deep inside a \(d\)-wave superconducting state with nodal quasiparticles in a two-dimensional tetragonal crystal. We find that, within a \(1∕N\) expansion, the transition is continuous. To leading order in \(1∕N\), quantum fluctuations enhance the dispersion anisotropy of the nodal excitations and cause strong scattering, which critically broadens the quasiparticle (qp) peaks in the spectral function, except in a narrow wedge in momentum space near the Fermi surface where the qps remain sharp. We also consider the possible existence of a nematic glass phase in the presence of weak disorder. Some possible implications for cuprate physics are also discussed.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:7784445
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