Dujovne Irene, Pinczuk A, Kang Moonsoo, Dennis B S, Pfeiffer L N, West K W
Department of Applied Physics and Applied Math, Columbia University, New York, New York 10027, USA.
Phys Rev Lett. 2003 Jan 24;90(3):036803. doi: 10.1103/PhysRevLett.90.036803. Epub 2003 Jan 23.
Excitation modes in the range 2/5>or=nu>or=1/3 of the fractional quantum Hall regime are observed by resonant inelastic light scattering. Spectra of spin-reversed excitations suggest a structure of lowest spin-split Landau levels of composite fermions that is similar to that of electrons. Spin-flip energies determined from spectra reveal significant composite fermion interactions. The filling factor dependence of mode energies displays an abrupt change in the middle of the range when there is partial population of a composite fermion level.
通过共振非弹性光散射观察到分数量子霍尔 regime 中 2/5≥ν≥1/3 范围内的激发模式。自旋反转激发的光谱表明复合费米子的最低自旋分裂朗道能级结构与电子的相似。从光谱确定的自旋翻转能量揭示了显著的复合费米子相互作用。当复合费米子能级存在部分占据时，模式能量的填充因子依赖性在该范围中间显示出突然变化。
