Author/Authors :
Yu-Ming Cheng، نويسنده , , Tsai-Yu Huang، نويسنده , , Chao Han Pao، نويسنده , , Chun-Cheng Lee، نويسنده , , C.-T Liang، نويسنده , , M.Y Simmons، نويسنده , , C.G Smith، نويسنده , , D.A. Ritchie، نويسنده , , M Pepper، نويسنده , , Gil-Ho Kim، نويسنده , , J.Y. Leem، نويسنده ,
Abstract :
We report low-temperature magnetoresistivity measurements of high-quality gated two-dimensional (2D) electron systems. In the dilute electron density limit, we show evidence for spin polarisation in an in-plane magnetic field. Using a simple model, we estimate the Landé g-factor in this dilute two-dimensional electron gas to be about 3.32. The enhanced Landé g-factor compared with that of a bulk GaAs 2D electron system (0.44) is ascribed to electron–electron interaction effects at ultra-low electron densities.
