Thermoelectric response of spin polarization in Rashba spintronic systems

2015/05/31 by Cong Xiao, Xiao, Cong, Dingping Li +3 · 1 citation
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena

paper · pdf · doi:10.48550/arxiv.1506.00203

openalex publication_date 2015/05/31 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28

Abstract

Motivated by recent discovery of strongly spin-orbit coupled two-dimensional (2D) electron gas near the surface of Rashba semiconductors BiTeX (X=Cl, Br, I), we calculate thermoelectric responses of spin polarization in 2D Rashba model using an exact solution of the linearized Boltzmann equation for elastic scattering. When the Fermi energy E_F lies below the band crossing point we find a non-Edelstein electric-field induced spin polarization which is linear in E_F. We show that the Mott-like relation between spin polarizations induced by the temperature gradient and electric field breaks down significantly when E_F lies in the vicinity of the band crossing point. As the temperature tends to zero, the temperature-gradient induced spin polarization vanishes. These results differ from previous ones obtained by relaxation time approximations.

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• Spin band geometry drives intrinsic thermal spin magnetization and current

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