Chiral symmetry breaking and violation of the Wiedemann-Franz law in underdoped cuprates

Abstract

We propose that the recently observed violation of the Wiedemann-Franz law in the normal state of underdoped cuprates is caused by spin-charge separation and dynamical chiral symmetry breaking in a (2+1)-dimensional system consisting of massless Dirac fermions, charged bosons and a gauge field. While the d-wave spinon gap vanishes at the Fermi points, the nodal fermions acquire a finite mass due to strong gauge fluctuations. This mass provides a gap below which no free fermions can be excited. This implies that there is not a residual linear term for the thermal conductivity, in good agreement with experiments. Other physical implications of the CSB are also discussed.

arXiv comment13 pages, no figures

References in corpus (24)

• Theory of Underdoped Cuprates
• Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors
• STM Studies of the Electronic Structure of Vortex Cores in Bi2Sr2CaCu2O8+d
• Impurity-Induced Quasiparticle Transport and Universal Limit Wiedemann-Franz Violation in d-Wave Superconductors
• An SU(2) Formulation of the t-J model: Application to Underdoped Cuprates
• Confinement and complex singularities in QED3
• Breakdown of Fermi-liquid theory in a cuprate superconductor
• Electron spectral function and algebraic spin liquid for the normal state of underdoped high $T_c$ superconductors
• Theory of spin excitations in undoped and underdoped cuprates
• Dual Order Parameter for the Nodal Liquid
• The Influence of the Full Vertex and Vacuum Polarization on the Fermion Propagator in QED3
• Fractionalization in the cuprates: Detecting the topological order
• Antiferromagnetism from phase disordering of a d-wave superconductor
• Fractionalization, topological order, and cuprate superconductivity
• Chiral Symmetry Breaking and Phase Fluctuations in Cuprate Superconductors: A QED${}_3$ Unified Theory of the Pseudogap State
• Separation of Spin and Charge Quantum Numbers in Strongly Correlated Systems
• Pseudogaps in Underdoped Cuprates
• Vortex Structure in Underdoped Cuprates
• Nonperturbative infrared dynamics of three-dimensional QED with a four-fermion interaction
• Vortex state in a doped Mott insulator
• Violation of the Wiedemann-Franz Law in a Large-N Solution of the t-J Model
• Condition on the symmetry-breaking solution of the Schwinger-Dyson equation
• Flux tubes, visons, and vortices in spin-charge separated superconductors
• A condition on the chiral symmetry breaking solution of the Dyson-Schwinger equation in three-dimensional QED

Cited by in corpus (11)

• Effect of gauge boson mass on chiral symmetry breaking in QED${}_3$
• Confinement of matter fields in compact (2+1)-dimensional QED theory of high-$T_c$ superconductors
• Dynamical chiral symmetry breaking in QED${}_3$ at finite density and impurity potential
• Unconventional behavior of Dirac fermions in three-dimensional gauge theory
• Effects of random potentials in three-dimensional quantum electrodynamics
• Deconfined quantum criticality driven by Dirac fermions in SU(2) antiferromagnets
• Confinement induced by fermion damping in three-dimensional QED
• Infrared behavior of dynamical fermion mass generation in QED${}_3$
• Effects of the Pseudo-Chern-Simons action for strongly correlated electrons in the plane
• Renormalization of fermion velocity in finite temperature QED_{3}
• Influence of Fermion Velocity Renormalization on Dynamical Mass Generation in QED${}_3$