Nesting instability of gapless U(1) spin liquids with spinon Fermi pockets in two dimensions

@inproceedings{Kruger2021NestingIO,
  title={Nesting instability of gapless U(1) spin liquids with spinon Fermi pockets in two dimensions},
  author={Wilhelm G. F. Kruger and Lukas Janssen},
  year={2021}
}
Quantum spin liquids are exotic states of matter that may be realized in frustrated quantum magnets and feature fractionalized excitations and emergent gauge fields. Here, we consider a gapless U(1) spin liquid with spinon Fermi pockets in two spatial dimensions. Such a state appears to be the most promising candidate to describe the exotic field-induced behavior observed in numerical simulations of the antiferromagnetic Kitaev honeycomb model. A similar such state may also be responsible for… 

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References

SHOWING 1-10 OF 152 REFERENCES

Magnetic field-induced intermediate quantum spin liquid with a spinon Fermi surface

It is shown that the gapless spin liquid harbors fractionalized neutral fermionic excitations, dubbed spinons, that remarkably form a Fermi surface in a charge insulator.

Emergence of a field-driven U(1) spin liquid in the Kitaev honeycomb model

Hickey and Trebst show that magnetic fields can destabilize the well-known gapped Kitaev spin liquid and induce a new gapless spin liquid, with a distinct gauge structure and neutral Fermi surface, at intermediate field strengths.

Cooper pairing in non-Fermi liquids

States of matter with a sharp Fermi surface but no well-defined Landau quasiparticles arise in a number of physical systems. Examples include (i) quantum critical points associated with the onset of…

Excitations in the field-induced quantum spin liquid state of Ξ±-RuCl3

The celebrated Kitaev quantum spin liquid (QSL) is the paradigmatic example of a topological magnet with emergent excitations in the form of Majorana Fermions and gauge fluxes. Upon breaking of…

On the stability of U(1) spin liquids in two dimensions

We establish that spin liquids described in terms of gapless fermionic (Dirac) spinons and gapless U(1) gauge fluctuations can be stable in two dimensions, at least when the physical SU(2) spin…

Kitaev exchange and field-induced quantum spin-liquid states in honeycomb Ξ±-RuCl3

The promise for spin-liquid behavior in the 4d5 honeycomb halide Ξ±-RuCl3 is discussed, and indications for a transition from zigzag order to a gapped spin liquid when applying magnetic field are found.

Majorana fermions in the Kitaev quantum spin system Ξ±-RuCl 3

Ξ±-RuCl3 has recently attracted great interest as a possible experimental realization of the Kitaev model. Neutron scattering measurements of a single crystal of this material reveal signatures of…

Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid

Half-integer quantization of the thermal Hall effect in a Kitaev spin liquid reveals chiral currents of charge-neutral Majorana fermions around the edges of the sample, produced by strong electronic correlations.

Confinement transition of β„€2 gauge theories coupled to massless fermions: Emergent quantum chromodynamics and SO(5) symmetry

This work develops a field theory description of the direct transition involving an emergent nonabelian [SU(2)] gauge theory and a matrix Higgs field and finds numerical evidence for an enlarged SO(5) symmetry rotating between antiferromagnetism and valence bond solid orders proximate to criticality.

A spin–orbital-entangled quantum liquid on a honeycomb lattice

This work reports a quantum-liquid state of pseudospin-1/2 moments in the 5d-electron honeycomb compound H3LiIr2O6, which is concluded to be a quantum spin liquid and opens the door to finding exotic quasiparticles in a strongly spin–orbit-coupled 5d–electron transition-metal oxide.
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