[16p-S2_201-1~11] 10.4 Spintronics in semiconductor, topological material, superconductor, and multiferroics

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)English Presentation

[16p-S2_201-1] Observation of spin dynamics of a two-dimensional electron gas in a (001) GaAs/AlGaAs heterointerface suitable for electrical spin injection

〇Kento Sugawara¹, Koga Akagi¹, Jun Ishihara¹, Daiki Sekine^1,2, Sota Yamamoto¹, Mineto Ogawa³, Tetsuya Uemura³, Makoto Kohda^1,2,4,5 (1.Grad.School of Eng., Tohoku Univ., 2.QUARC, QST, 3.Hokkaido Univ., 4.CSIS, Tohoku Univ., 5.DEFS, Tohoku Univ.)

Keywords:

spintronics,GaAs,2DEG

To clarify the spin dynamics of the two-dimensional electron gas (2DEG) in a (001) GaAs/AlGaAs single heterointerface, we evaluated the excitation energy dependence of the g-factor. The g-factor exhibited a linear increase with increasing excitation energy. By extrapolating the linear fit to the Fermi level (1.523 eV), we obtained a g-factor of -0.35. This value differs from that of bulk GaAs (-0.44), indicating that the observed spin signals originate from the 2DEG.