Spin Liquid States at the vicinity of metal-insulator transition

Abstract

We study in this paper quantum spin liquid states (QSLs) at the vicinity of metal-insulator transition. Assuming that the low energy excitations in the QSLs are labeled by "spinon" occupation numbers with the same Fermi surface structure as in the corresponding metal (Fermi-liquid) side, we propose a phenomenological Landau-like low energy theory for the QSLs and show that the usual U(1) QSLs is a representative member of this class of spin liquids. Based on our effective low energy theory, an alternative picture to the Brinkman-Rice picture of Mott metal-insulator transition is proposed. The charge, spin and thermal responses of QSLs are discussed under such a phenomenology.

8 pages, extended version to appear in PRB

References in corpus (8)

• Spin Dynamics of the Spin-1/2 Kagome Lattice Antiferromagnet ZnCu_3(OH)_6Cl_2
• Spin-Liquid State in the S = 1/2 Hyperkagome Antiferromagnet Na4Ir3O8
• U(1) Gauge Theory of the Hubbard Model : Spin Liquid States and Possible Application to k-(BEDT-TTF)_2 Cu_2 (CN)_3
• Novel Pauli-paramagnetic quantum phase in a Mott insulator
• Transport Properties of a spinon Fermi surface coupled to a U(1) gauge field
• Power-law Conductivity inside the Mott gap: application to $\kappa -(BEDT-TTF{)}_{2}C{u}_2(CN{)}_3$
• Spinon Phonon Interaction and Ultrasonic Attenuation in Quantum Spin Liquids
• How to measure a spinon Fermi surface

Cited by in corpus (14)

• Quantum Spin Liquid States
• Absence of magnetic thermal conductivity in the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2 -- revisited
• Quasi-continuous transition from a Fermi liquid to a spin liquid
• Field-Induced Instability of a Gapless Spin Liquid with a Spinon Fermi Surface
• Electrodynamics of quantum spin liquids
• Cyclotron resonance inside the Mott gap: a fingerprint of emergent neutral fermions
• Low-Energy Excitations in Quantum Spin-Liquids Identified by Optical Spectroscopy
• Distinct-symmetry spin liquid states and phase diagram of Kitaev-Hubbard model
• Persistence of fermionic spin excitations through a genuine Mott transition in $\kappa$-type organics
• Optical conductivity and surface plasmon modes of U(1) spin liquid states with large spinon Fermi surfaces
• Fractionalization of long-range ordered states in a Falicov-Kimball model
• Continuous transition from a Landau quasiparticle to a neutral spinon
• Nonlinear optical conductivity of $U(1)$ spin liquids with large spinon Fermi surfaces
• Collective effects in an incompressible electronic liquid