Motivated by the recent discovery of a strongly spin-orbit-coupled two-dimensional （2D） electron gas near the surface of Rashba semiconductors BiTeX （X = Cl, Br, I）, we calculate the thermoelectric responses of sp...Motivated by the recent discovery of a strongly spin-orbit-coupled two-dimensional （2D） electron gas near the surface of Rashba semiconductors BiTeX （X = Cl, Br, I）, we calculate the thermoelectric responses of spin polarization in a 2D Rashba model. By self-consistently determining the energy- and band-dependent transport time, we present tion for elastic scattering. Using this solution, an exact solution of the linearized Boltzmann equa- we find a non-Edelstein electric-field-induced spin polarization that is linear in the Fermi energy EF when EF lies below the band crossing point. The spin polarization efficiency, which is the electric-field-induced spin polarization divided by the driven electric current, increases for smaller EF. We show that, as a function of EF, the temperature- gradient-induced spin polarization increases continuously to a saturation value when EF decreases below the band crossing point. As the temperature tends to zero, the temperature-gradient-induced spin polarization vanishes.展开更多
文摘Motivated by the recent discovery of a strongly spin-orbit-coupled two-dimensional （2D） electron gas near the surface of Rashba semiconductors BiTeX （X = Cl, Br, I）, we calculate the thermoelectric responses of spin polarization in a 2D Rashba model. By self-consistently determining the energy- and band-dependent transport time, we present tion for elastic scattering. Using this solution, an exact solution of the linearized Boltzmann equa- we find a non-Edelstein electric-field-induced spin polarization that is linear in the Fermi energy EF when EF lies below the band crossing point. The spin polarization efficiency, which is the electric-field-induced spin polarization divided by the driven electric current, increases for smaller EF. We show that, as a function of EF, the temperature- gradient-induced spin polarization increases continuously to a saturation value when EF decreases below the band crossing point. As the temperature tends to zero, the temperature-gradient-induced spin polarization vanishes.
