Spin-triplet pairing instability of the spinon Fermi surface in a U(1) spin liquid

Abstract

Recent experiments on the organic compound κ-(ET)_2Cu_2(CN)_3 have provided a promising example of a two dimensional spin liquid state. This phase is described by a two-dimensional spinon Fermi sea coupled to a U(1) gauge field. We study Kohn-Luttinger-like pairing instabilities of the spinon Fermi surface due to singular interaction processes with twice-the-Fermi-momentum transfer. We find that under certain circumstances the pairing instability occurs in odd-orbital-angular-momentum/spin-triplet channels. Implications to experiments are discussed.

4 pages, 1 figure

References in corpus (22)

• Spin Liquid State in an Organic Mott Insulator with Triangular Lattice
• Z_2 Gauge Theory of Electron Fractionalization in Strongly Correlated Systems
• Variational study of triangular lattice spin-1/2 model with ring exchanges and spin liquid state in κ-(ET)_2 Cu_2 (CN)_3
• U(1) Gauge Theory of the Hubbard Model : Spin Liquid States and Possible Application to k-(BEDT-TTF)_2 Cu_2 (CN)_3
• On the low energy properies of fermions with singular interactions
• Mott Transition from a Spin Liquid to a Fermi Liquid in the Spin-Frustrated Organic Conductor kappa-(ET)2Cu2(CN)3
• Non-Fermi Liquid Fixed Point in 2+1 Dimensions
• Low Energy Dynamics of the Spinon-Gauge System
• Gauge-invariant response functions of fermions coupled to a gauge field
• Quantum critical behavior in itinerant electron systems -- Eliashberg theory and instability of a ferromagnetic quantum-critical point
• Amperean Pairing Instability in the U(1) Spin Liquid State with Fermi Surface and Application to $\kappa -(BEDT-TTF{)}_{2}C{u}_2(CN{)}_3$
• Fractionalization in the cuprates: Detecting the topological order
• Vortices and quasiparticles near the "superconductor-insulator" transition in thin films
• Singular perturbation theory for interacting fermions in two dimensions
• Criticality in quantum triangular antiferromagnets via fermionized vortices
• Universal temperature corrections to Fermi liquid theory in an interacting electron system
• On the spin density wave transition in a two dimensional spin liquid
• On the residual resistivity near a two dimensional metamagnetic quantum critical point
• Kohn-Luttinger pseudo-pairing in a two-dimensional Fermi-liquid
• Temperature dependent spin susceptibility in a two-dimensional metal
• Metallic phase in a two-dimensional disordered Fermi system with singular interactions
• The Kohn-Luttinger Effect in Gauge Theories

Cited by in corpus (34)

• Quantum Spin Liquid States
• Low energy effective theory of Fermi surface coupled with U(1) gauge field in 2+1 dimensions
• Quantum frustration in organic Mott insulators: from spin liquids to unconventional superconductors
• Cavity-mediated electron-photon superconductivity
• Theory of a continuous Mott transition in two dimensions
• Emergence of a Field-Driven U(1) Spin Liquid in the Kitaev Honeycomb Model
• Imaging spinon density modulations in a 2D quantum spin liquid
• Stability of the U(1) spin liquid with spinon Fermi surface in 2+1 dimensions
• Weak Mott insulators on the triangular lattice: possibility of a gapless nematic quantum spin liquid
• The Paired Electron Crystal: order from frustration in the quarter-filled band
• Pressure-Tuned Exchange Coupling of a Quantum Spin Liquid in the Molecular Triangular Lattice $\kappa$-(ET)${}_2$Ag${}_2$(CN)${}_3$
• Novel Pauli-paramagnetic quantum phase in a Mott insulator
• Spin liquids in geometrically perfect triangular antiferromagnets
• Temperature dependence of structural and electronic properties of the spin-liquid candidate kappa-(BEDT-TTF)2Cu2(CN)3
• Critical Spin Liquid versus Valence Bond Glass in Triangular Lattice Organic $\kappa$-(ET)${}_2$Cu${}_2$(CN)${}_3$
• Molecular Quantum Materials: Electronic Phases and Charge Dynamics in Two-Dimensional Organic Solids
• Experimental signatures of quantum and topological states in frustrated magnetism
• Mott Transition and Superconductivity in Quantum Spin Liquid Candidate NaYbSe${}_2$
• Amperean Pairing at the Surface of Topological Insulators
• Charge Friedel oscillations in a Mott insulator
• Paired electron pockets in the hole-doped cuprates
• Finite-temperature behavior of a classical spin-orbit-coupled model for ${\text{YbMgGaO}}_4$ with and without bond disorder
• Instabilities of Spin-Liquid States in a Quantum Kagome Antiferromagnet
• VO${}_2$ as a natural optical metamaterial
• Field-Induced Instability of a Gapless Spin Liquid with a Spinon Fermi Surface
• Higher angular momentum pairing from transverse gauge interactions
• Nature of the phases in the frustrated XY model on the honeycomb lattice
• The unreasonable effectiveness of Eliashberg theory for pairing of non-Fermi liquids
• Dynamical reduction of the dimensionality of exchange interactions and the "spin-liquid" phase of $\kappa$-(BEDT-TTF)${}_{2}X$
• Impurities in triangular lattice spin 1/2 antiferromagnet
• Low-temperature lattice effects in the spin-liquid candidate $\kappa$-(BEDT-TTF)${}_2$Cu${}_2$(CN)${}_3$
• Spinon Majorana fermions
• Effects of Zeeman field on a Spin Bose-Metal phase
• Quantum Phases and Spin Liquid Properties of 1T-TaS2