TRANSPORT CHARACTERISTICS OF SERIES BALLISTIC POINT CONTACTS

被引:24
作者
HIRAYAMA, Y
SAKU, T
机构
[1] NTT Basic Research Laboratories, Nippon Telegraph and Telephone Corporation, Tokyo 180, Musashino-shi
来源
PHYSICAL REVIEW B | 1990年 / 41卷 / 05期
关键词
D O I
10.1103/PhysRevB.41.2927
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A double ballistic point contact (D-BPC) structure, where two point contacts are placed in series with a separation of Lsp, is fabricated by focused Ga-ion beam scanning. Conductance characteristics for an Lsp=200 nm sample show multiple peaks in their gate-bias dependences. These peaks probably originate from ballistic transport through zero-dimensional levels. The Lsp=400 and 800 nm samples show step structures similar to those of a single point contact. Although plateau resistance values differ from the quantized values (Rn) with a zero magnetic field, it is found that they approach Rn as the magnetic field increases. © 1990 The American Physical Society.
引用
收藏
页码:2927 / 2930
页数:4
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