Spin rectification in thermally driven XXZ spin chain via the spin-Seebeck effect

Abstract

We study the phenomenon of spin-current rectification in a one-dimensional XXZ spin chain in the presence of a thermal drive. In our model a pure spin current is generated by a temperature difference between two harmonic heat baths which in turn creates a spin voltage via the spin-Seebeck effect. Along with a local spin-current operator definition and the nonequilibrium modified Redfield solution we study the spin-rectification ratio as a function of system size and external magnetic field. Intriguing effects are observed at low temperatures such as oscillations with system size and high range of tunability with external magnetic field making magnetic insulators, which are well described by the XXZ model, ideal candidates to build spin devices based on rectification.

7 pages, 3 figures. Several parts of the ms. have been revised and important references have been added. The part on the effect of magnetic field on the rectification ratio has been revised, taking spinons as the carriers of spin current. This version has been accepted by EPL

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Cited by in corpus (8)

• Nanoscale Spin Seebeck Rectifier: Controlling Thermal Spin Transport across Insulating Magnetic Junctions with Localized Spin
• Coexistence of energy diffusion and local thermalization in nonequilibrium XXZ spin chains with integrability breaking
• Degenerated Liouvillians and Steady-State Reduced Density Matrices
• Nonreciprocal Quantum Transport at Junctions of Structured Leads
• Thermal rectification in anharmonic chains under an energy-conserving noise
• A perturbative method for nonequilibrium steady state of open quantum systems
• Quantum energy transfer between nonlinearly-coupled bosonic bath and a fermionic chain: an exactly solvable model
• Heat rectification by two qubits coupled with Dzyaloshinskii-Moriya interaction