Spin-orbit coupling in the metallic and spin-liquid phases of Na4Ir3O8

Abstract

It has recently been proposed that Na4Ir3O8 is a weak Mott insulator at ambient pressure, supporting a three-dimensional spin liquid phase with a spinon Fermi surface. This proposal is consistent with recent experimental findings that the material becomes a metal upon increasing pressure or doping. In this work, we investigate the effect of the spin-orbit coupling arising from 5d Ir moments both in the metallic and spin liquid phases of Na4Ir3O8. The effective Hubbard model in terms of pseudospin j=1/2 Ir states is derived and its consequences to both metallic and spin liquid phases are studied. In particular, the model leads to enhanced Wilson ratio and strong temperature dependence of the Hall coefficient.

8 pages, 9 figures

References in corpus (11)

• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Mott physics and band topology in materials with strong spin-orbit interaction
• Spin-Liquid State in the S = 1/2 Hyperkagome Antiferromagnet Na4Ir3O8
• Bandwidth-Controlled Insulator-Metal Transition and Correlated Metallic State in 5$d$ Transition Metal Oxides Sr${}_{n+1}$Ir${}_n$O${}_{3n+1}$ ($n$=1, 2, and $\infty$)
• Quantum spin Hall effect in a transition metal oxide Na2IrO3
• Spin-orbit effects in Na${}_4$Ir${}_3$O${}_8$, a hyper-kagomé lattice antiferromagnet
• Gapless spin liquids on the three dimensional hyper-kagome lattice of Na${}_4$Ir${}_3$O${}_8$
• Topological spin liquid on the hyper-kagome lattice of Na_4Ir_3O_8
• Na4Ir3O8 as a 3D spin liquid with fermionic spinons
• Electronic Structure of Hyperkagome Na4Ir3O8
• How to measure a spinon Fermi surface

Cited by in corpus (14)

• Models and Materials for Generalized Kitaev Magnetism
• The Challenge of Spin-Orbit-Tuned Ground States in Iridates
• Pyrochlore electrons under pressure, heat and field: shedding light on the iridates
• Topological Quantum Phase Transition in 5$d$ Transition Metal Oxide Na${}_2$IrO${}_3$
• Spin-Orbital Locking, Emergent Pseudo-Spin, and Magnetic order in Honeycomb Lattice Iridates
• Competing magnetic orders and spin liquids in two- and three-dimensional kagome systems: A pseudo-fermion functional renormalization group perspective
• Frozen State and Spin Liquid Physics in Na4Ir3O8: an NMR study
• Quantum Spin Liquid in a Breathing Kagome Lattice
• Interplay between Lattice Distortion and Spin-Orbit Coupling in Double Perovskites
• Topological Insulators and Quantum Spin Liquids
• The electronic structure of NaIrO${}_3$, Mott insulator or band insulator?
• Fano Resonances in the Infrared Spectra of Phonons in Hyper-Kagome Na_3Ir_3O_8
• Generic model for hyperkagome iridate in the local moment regime
• Thermal conductivity across the metal-insulator transition in single crystalline hyperkagome Na${}_{3+x}$Ir${}_3$O${}_8$