Probing excitations in insulators via injection of spin-currents

Abstract

We propose a spin transport experiment to measure the low-energy excitations in insulators with spin degrees of freedom, with a focus on detecting ground states that lack magnetic order. A general formalism to compute the spin-current from a metal with a non-equilibrium distribution of spins to an insulator is developed. It is applied to insulating states with and without long range magnetic order, and salient features in the spin-conductance are noted.

21+4 pages, 4 figures. A few typos edited and references added, results unchanged

References in corpus (10)

• Direct electronic measurement of the spin Hall effect
• 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
• On the stability of U(1) spin liquids in two dimensions
• Spin liquid phase of the $S=\frac{1}{2}$ $J_1-J_2$ Heisenberg model on the triangular lattice
• Competing Spin Liquid States in the Spin-$1/2$ Heisenberg Model On Triangular Lattice
• Superfluid spin transport through antiferromagnetic insulators
• Global Phase Diagram of Competing Ordered and Quantum Spin Liquid Phases on the Kagomé Lattice
• Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators
• Global phase diagram, possible chiral spin liquid and topological superconductivity in the triangular Kitaev-Heisenberg model

Cited by in corpus (22)

• Quantum Spin Liquids
• A Field Guide to Spin Liquids
• Symmetry breaking and skyrmionic transport in twisted bilayer graphene
• Local Probes for Charge-Neutral Edge States in Two-Dimensional Quantum Magnets
• Diagnosing phases of magnetic insulators via noise magnetometry with spin qubits
• Statistics of fractionalized excitations through threshold spectroscopy
• Spin injection and spin transport in paramagnetic insulators
• Edge magnetization and spin transport in an SU(2)-symmetric Kitaev spin liquid
• Bose-Einstein Condensation of Magnons Pumped by the Bulk Spin Seebeck Effect
• Probing quantum spin liquids with a quantum twisting microscope
• Signatures of fractionalization in spin liquids from interlayer thermal transport
• Probing quantum spin liquids in equilibrium using the inverse spin Hall effect
• BMS symmetry, soft particles and memory
• Detecting End-States of Topological Quantum Paramagnets via Spin Hall Noise Spectroscopy
• Monopole Josephson Effects in a Dirac Spin Liquid
• Oriented propagation of magnetization due to chiral edge modes in Kitaev-type models
• Spin Transport in Quantum Spin-Orbital Liquids
• Designing Quantum Spin-Orbital Liquids in Artificial Mott Insulators
• Bad topological semimetals in layered honeycomb compounds
• Drag resistance mediated by quantum spin liquids
• The Future of the Correlated Electron Problem
• Topological Aspects of Antiferromagnets