[15a-501-1~10] 10.4 Semiconductor spintronics, superconductor, multiferroics

[15a-501-5] Effect of momentum distribution on cubic Dresselhaus spin-orbit interaction in two-dimensional electron gas

〇Yoji Kunihashi¹, Haruki Sanada¹, Yusuke Tanaka¹, Keita Nakagawara², Hideki Gotoh¹, Koji Onomitsu¹, Makoto Kohda², Junsaku Nitta², Tetsuomi Sogawa¹ (1.NTT BRL, 2.Tohoku Univ.)

Keywords:spin-orbit interaction, Kerr rotation microscopy

The comprehensive understanding of spin dynamics of drifting electrons is significantly important for future spintronics. In this report, we discuss the in-plane electric field dependence of the spin-orbit interaction (SOI) for laterally drifting spins in a GaAs quantum well. The strengths of spin-orbit effective magnetic fields were quantitatively estimated from spin precession periods measured using spatially resolved Kerr rotation microscopy. The in-plane electric field dependence of the spin precession frequency for steadily drifting spins reveals that the strength of the cubic Dresselhaus SOI is directly varied by the momentum distribution of the electron system in a single device.