Spin polarization of composite fermions: Measurements of the Fermi energy

被引：211
|
作者：
Kukushkin, IV
von Klitzing, K
Eberl, K
机构：
[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 18期
关键词：
D O I：
10.1103/PhysRevLett.82.3665
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
From the degree of circular polarization of the time-resolved radiative recombination of 2D electrons with photoexcited holes bound to accepters we have measured the magnetic field dependencies of the electron spin polarization for various fractional (nu = 2/3, 3/5, 4/7, 2/5, 3/7, 4/9, 8/5, 4/3, and 7/5) and composite fermions (nu = 1/2, 1/4, and 3/2) states. The Fermi energies of these composite fermion states are measured for the first time and the corresponding value of the composite fermion density of states mass at nu = 1/2 is found to be about 4 times heavier than the previously reported values of the "activation" mass. [S0031-9007(99)09059-6].
引用
收藏
页码：3665 / 3668
页数：4
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