Dependence of effective mass on spin and valley degrees of freedom

被引：10
|
作者：
Gokmen, T. [1 ]
Padmanabhan, Medini [1 ]
Shayegan, M. [1 ]
机构：
[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.101.146405
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measure the effective mass (m*) of interacting two-dimensional electrons confined to an AlAs quantum well while we change the conduction-band valley occupation and the spin polarization via the application of strain and magnetic field, respectively. Compared to its band value, m* is enhanced unless the electrons are fully valley- and spin-polarized. Incidentally, in the fully spin- and valley-polarized regime, the electron system exhibits an insulating behavior.
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页数：4
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