Interacting random Dirac fermions in superconducting cuprates

Details Interacting random Dirac fermions in superconducting cuprates Interacting random Dirac fermions in superconducting cuprates

2000-11-14

arxiv.org/abs/cond-mat/0011249v4

Phys. Rev. Lett. v.86, p.4668 (2001)

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevLett.86.4668

We study the effects of quasiparticle interactions on disorder-induced localization of Dirac-like nodal excitations in superconducting high-$T_c$ cuprates. As suggested by the experimental ARPES and terahertz conductivity data in $Bi_2Sr_2CaCu_2O_{8+\delta}$, we focus on the interactions mediated by the order parameter fluctuations near an incipient second pairing transition $d\to d+is$. We find interaction corrections to the density of states, specific heat, and conductivity as well as phase and energy relaxation rates and assess the applicability of the recent localization scenarios for non-interacting random Dirac fermions to the cuprates.

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