Frequency dependent transport through a spin chain

Abstract

Motivated by potential applications in spintronics, we study frequency dependent spin transport in nonitinerant one-dimensional spin chains. We propose a system that behaves as a capacitor for the spin degree of freedom. It consists of a spin chain with two impurities a distance $d$ apart. We find that at low energy (frequency) the impurities flow to strong coupling, thereby effectively cutting the chain into three parts, with the middle island containing a discrete number of spin excitations. At finite frequency spin transport through the system increases. We find a strong dependence of the finite frequency characteristics both on the anisotropy of the spin chain and the applied magnetic field. We propose a method to measure the finite-frequency conductance in this system.

References in corpus (7)

• Spin Seebeck insulator
• Realization of XNOR and NAND spin-wave logic gates
• Electric-field control of spin waves at room temperature in multiferroic BiFeO3
• Performance of a spin-based insulated gate field effect transistor
• Transport properties of single channel quantum wires with an impurity: Influence of finite length and temperature on average current and noise
• AC magnetization transport and power absorption in non-itinerant spin chains
• AC conductance and non-symmetrized noise at finite frequency in quantum wires and carbon nanotubes

Cited by in corpus (3)

• Magnetic texture-induced thermal Hall effects
• Spin Currents and Magnon Dynamics in Insulating Magnets
• Spin transport in the Neel and collinear antiferromagnetic phase of the two dimensional spatial and spin anisotropic Heisenberg model on a square lattice