FREQUENCY-DEPENDENT CONDUCTANCE OF TUNNEL-JUNCTIONS

被引：17
作者：
BRANDES, T
WEINMANN, D
KRAMER, B
机构：
[1] Physikalisch-Technische Bundesanstalt, Braunschweig, W-3300
来源：
EUROPHYSICS LETTERS | 1993年 / 22卷 / 01期
关键词：
D O I：
10.1209/0295-5075/22/1/010
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The a.c. conductance of a quasi-one-dimensional system with a potential barrier is calculated in linear response. Its frequency dependence is used to define a dynamic capacitance. The influence of phase-breaking electron-phonon interactions is investigated. It is argued that Coulomb interaction is of minor importance at higher frequencies. The low-frequency limit for the suppression of Coulomb interaction is estimated for GaAs-AlGaAs point contacts. The relation between the dynamic and the static capacitance is discussed.
引用
收藏
页码：51 / 56
页数：6
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