Magnetic focusing with quantum point contacts in the non-equilibrium transport regime

被引：7
|
作者：
Chen, T. -M. [1 ,2 ]
Pepper, M. [3 ]
Farrer, I. [2 ]
Ritchie, D. A. [2 ]
Jones, G. A. C. [2 ]
机构：
[1] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan
[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[3] UCL, Dept Elect & Elect Engn, London WC1E 7JE, England
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 09期
基金：
英国工程与自然科学研究理事会;
关键词：
DIMENSIONAL ELECTRON-GAS; BALLISTIC RESISTANCE; CONDUCTANCE; FIELD; WIRE;
D O I：
10.1063/1.4819489
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report an experimental investigation of magnetic focusing in the 1D non-equilibrium transport regime and utilize it to study the energy variation of electrons propagating through a quantum point contact. The results give insight into the behavior of electrons with different energies when current is both unidirectional and bidirectional, in particular, a splitting of the focusing peaks which demonstrates that the intrinsic resistance within the point contact is negligible and that the voltage drop is at least 3 mu m away from the ends of the point contact. (C) 2013 AIP Publishing LLC.
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页数：4
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