In a fractionalized Fermi liquid at small doping, spinon-chargon bound states interact via a dipolar potential whose Fourier components peak at the AF wavevector due to projective symmetry, enabling d_{x^2-y^2} pairing.
SU(2) gauge theory of fluctuating stripe order in the two-dimensional Hubbard model
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abstract
We present an SU(2) gauge theory of fluctuating stripe order in the two-dimensional Hubbard model. The theory is based on a fractionalization of the electron operators in fermionic chargons with a pseudospin degree of freedom, and charge neutral spinons capturing fluctuations of the spin orientation. The chargons are treated in a renormalized mean-field theory. We focus on regions of the phase diagram where they undergo stripe order. The spinons are described by a non-linear sigma model with pseudospin stiffnesses determined by the chargons. They prevent breaking of the physical SU(2) spin symmetry at any finite temperature, resulting in a charge ordered pseudogap phase with a reconstructed Fermi surface and a spin gap. The spectral function for single-particle excitations exhibits a collection of Fermi arcs and other structures. The arcs appear in various regions of the Brillouin zone, but never exclusively around the Brillouin zone diagonals.
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2026 2verdicts
UNVERDICTED 2representative citing papers
SU(2) gauge theory plus DMFT with long-wavelength magnetic fluctuations produces damping asymmetry in chargon hole pockets that forms Fermi arcs in the underdoped regime.
citing papers explorer
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Superconductivity from emergent dipolar interactions in a fractionalized Fermi liquid
In a fractionalized Fermi liquid at small doping, spinon-chargon bound states interact via a dipolar potential whose Fourier components peak at the AF wavevector due to projective symmetry, enabling d_{x^2-y^2} pairing.
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The pseudogap in high-$T_c$ superconductors from SU(2) gauge symmetry and dynamic correlation effects
SU(2) gauge theory plus DMFT with long-wavelength magnetic fluctuations produces damping asymmetry in chargon hole pockets that forms Fermi arcs in the underdoped regime.