Van'kov A B, Kulik L V, Kukushkin I V, Kirpichev V E, Dickmann S, Zhilin V M, Smet J H, von Klitzing K, Wegscheider W
Institute for Solid State Physics, Russian Academy of Sciences, Chernogolovka 142432, Russia.
Phys Rev Lett. 2006 Dec 15;97(24):246801. doi: 10.1103/PhysRevLett.97.246801. Epub 2006 Dec 11.
We report an inelastic light scattering study of the cyclotron spin-flip mode in the two-dimensional electron system at filling nu=1. The energy of this mode can serve as a probe of the many-body exchange interaction on short length scales. Its magnetic field dependence is compared with predictions based on Hartree-Fock theory. They agree well when including the nonzero width of the electron system. From the measured energies, the exchange enhanced g factor is extracted. It diverges at small fields and differs largely from g factors obtained via transport activation studies.
我们报告了在填充因子ν = 1时二维电子系统中回旋自旋翻转模式的非弹性光散射研究。该模式的能量可作为短长度尺度上多体交换相互作用的探针。将其磁场依赖性与基于哈特里-福克理论的预测进行了比较。当考虑电子系统的非零宽度时，两者吻合良好。从测量的能量中提取了交换增强的g因子。它在小磁场下发散，并且与通过输运激活研究获得的g因子有很大不同。
