Detect Spinons via Spin Transport
arXiv:1301.1488 · doi:10.1103/PhysRevB.88.041405
Abstract
Existence of spinons is the defining property of quantum spin liquids. These exotic excitations have (fractionalized) spin quantum number and no electric charge, and have been proposed to form Fermi surfaces in the recently discovered organic spin liquid candidates. However direct probes for them are still lacking. In this paper we propose to experimentally identify the spinons by measuring the spin current flowing through the spin liquid candidate materials, which would be a direct test for the existence of spin-carrying mobile excitations. By the nonequilibrium Green function technique we evaluate the spin current through the interface between a Mott insulator and a metal under a spin bias, and find that different kinds of Mott insulators, including quantum spin liquids, can be distinguished by different relations between the spin bias and spin current, In the end we will also discuss relations to experiments and estimate experimentally relevant parameters.
7 pages with appendix, 3 figures
References in corpus (13)
- Spin Dynamics of the Spin-1/2 Kagome Lattice Antiferromagnet ZnCu_3(OH)_6Cl_2
- Projected wavefunction study of Spin-1/2 Heisenberg model on the Kagome lattice
- Quantum spin-liquid emerging in two-dimensional correlated Dirac fermions
- 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
- Effective spin model for the spin-liquid phase of the Hubbard model on the triangular lattice
- Spin Liquid Phase in Anisotropic Triangular Lattice Heisenberg Model: Exact diagonalization and density-matrix renormalization group calculations
- Transport Properties of a spinon Fermi surface coupled to a U(1) gauge field
- Double quantum dot as detector of spin bias
- Universal transport near a quantum critical Mott transition in two dimensions
- Using spin bias to manipulate and measure quantum spin in quantum dots
- Spinon Phonon Interaction and Ultrasonic Attenuation in Quantum Spin Liquids
- How to measure a spinon Fermi surface
Cited by in corpus (24)
- Quantum Spin Liquid States
- Quantum Spin Liquids
- Spin injection and spin transport in paramagnetic insulators
- Majorana-mediated spin transport without spin polarization in Kitaev quantum spin liquids
- Universal spin superconducting diode effect from spin-orbit coupling
- Probing excitations in insulators via injection of spin-currents
- Spin Nernst effect in the Paramagnetic Regime of An Antiferromagnetic Insulator
- Edge magnetization and spin transport in an SU(2)-symmetric Kitaev spin liquid
- Probing quantum spin liquids with a quantum twisting microscope
- Majorana correlations in the Kitaev model with ordered-flux structures
- Spin phase regulated spin Josephson supercurrent in topological superconductor
- Monopole Josephson Effects in a Dirac Spin Liquid
- Role of Majorana fermions in spin transport of anisotropic Kitaev model
- Oriented propagation of magnetization due to chiral edge modes in Kitaev-type models
- Spin Transport in Quantum Spin-Orbital Liquids
- Thermally enhanced Majorana-mediated spin transport in the Kitaev model
- Designing Quantum Spin-Orbital Liquids in Artificial Mott Insulators
- Theory of topological spin Josephson junctions
- Bad topological semimetals in layered honeycomb compounds
- Drag resistance mediated by quantum spin liquids
- Spinon Majorana fermions
- Quantum spin Hall effect in two-dimensional metals without spin-orbit coupling
- Digital Quantum Simulation of Spin Transport
- Topological Aspects of Antiferromagnets