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Updated: Oct 16, 2025

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
Published on: November 12, 2016
Spatiotemporal characteristics of spin transport in compensated metals with electron-hole exchange interaction
Masamichi Sakai1, Mst Sanjida Aktar1,2, Toshihiro Yoshizumi1
1Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan.
Abstract:
We develop a theory describing spatiotemporal behavior of spin transport in two-band metals by postulating a spin-exchange interaction between electrons and holes. Starting with the semiclassical Boltzmann equation, we derive a system of coupled diffusion equations and solve them analytically under steady-state conditions. The solutions reveal two types of electron-hole coupled-spin transport modes: a dissipative mode and a nondissipative mode with an infinite spin diffusion length. The two modes are the manifestations of two types of spin coupling channels. Besides the exchange interaction, we incorporate into our derivation the relaxation caused by the spin-orbit interaction to show how it affects the spin transport characteristics of the two modes.
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