Resonantly enhanced nonlinear conductance in long quantum point contacts near pinch-off

被引：15
|
作者：
Morimoto, T.
Henmi, M.
Naito, R.
Tsubaki, K.
Aoki, N.
Bird, J. P.
Ochiai, Y.
机构：
[1] Chiba Univ, Grad Sch Sci & Technol, Inage Ku, Chiba 2638522, Japan
[2] Chiba Univ, Dept Elect & Mech Engn, Inage Ku, Chiba 2638522, Japan
[3] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 09期
关键词：
D O I：
10.1103/PhysRevLett.97.096801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on a remarkable resonance in the differential conductance of long quantum point contacts (QPCs) that is observed as a precursor to regular quantized transport. This effect is increasingly pronounced in longer QPCs, in which the differential conductance may resonantly exceed 2e(2)/h. From a study of the experimental characteristics of this feature, we suggest that it may be associated with the formation of a well-resolved energy gap that opens dynamically as a result of enhanced many-body interactions in long QPCs.
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页数：4
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