[15a-501-1~10] 10.4 半導体スピントロニクス・超伝導・強相関

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

〇国橋 要司¹、眞田 治樹¹、田中 祐輔¹、中川原 圭太²、後藤 秀樹¹、小野満 恒二¹、好田 誠²、新田 淳作²、寒川 哲臣¹ (1.NTT物性研、2.東北大工)

キーワード：スピン軌道相互作用、Kerr回転顕微測定

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.