A model of <i>d</i>-wave superconductivity, antiferromagnetism, and charge order on the square lattice.

ABSTRACT: We describe the confining instabilities of a proposed quantum spin liquid underlying the pseudogap metal state of the hole-doped cuprates. The spin liquid can be described by a SU(2) gauge theory of N_f = 2 massless Dirac fermions carrying fundamental gauge charges-this is the low-energy theory of a mean-field state of fermionic spinons moving on the square lattice with π-flux per plaquette in the ℤ₂ center of SU(2). This theory has an emergent SO(5)_f global symmetry and is presumed to confine at low energies to the Néel state. At nonzero doping (or smaller Hubbard repulsion U at half-filling), we argue that confinement occurs via the Higgs condensation of bosonic chargons carrying fundamental SU(2) gauge charges also movin

SUBMITTER: Christos M 

PROVIDER: S-EPMC10214163 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature