BALLISTIC ELECTRON-TRANSPORT BEYOND 100-MU-M IN 2D ELECTRON-SYSTEMS

被引:59
作者
SPECTOR, J
STORMER, HL
BALDWIN, KW
PFEIFFER, LN
WEST, KW
机构
[1] AT and T Bell Laboratories, Murray Hill
关键词
D O I
10.1016/0039-6028(90)90310-5
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We have observed ballistic electron transport beyond 100 microm in the 2D electron system of an ultra-high mobility GaAs(AlGa)As heterostructure employing a magnetic electron focusing technique through wide point contacts. The amplitude of the characteristic magneto-oscillations is found to depend exponentially on electron propagation distance with a decay length λa = 15 microm. λa differs by about a factor of 2 from the mobility mean free path of 28 microm. This may indicate the determination of a different angular average of scattering events in focusing experiments as compared to standard mobility measurements. © 1990.
引用
收藏
页码:283 / 285
页数:3
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