COHERENCE AND PHASE-SENSITIVE MEASUREMENTS IN A QUANTUM-DOT

被引:659
作者
YACOBY, A
HEIBLUM, M
MAHALU, D
SHTRIKMAN, H
机构
[1] Braun Center for Submicron Research, Department of Condensed Matter Physics, Weizmann Institute of Science
关键词
D O I
10.1103/PhysRevLett.74.4047
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Via a novel interference experiment, which measures magnitude and phase of the transmission coefficient through a quantum dot in the Coulomb regime, we prove directly, for the first time, that transport through the dot has a coherent component. We find the same phase of the transmission coefficient at successive Coulomb peaks, each representing a different number of electrons in the dot; however, as we scan through a single Coulomb peak we find an abrupt phase change of . The observed behavior of the phase cannot be understood in the single particle framework. © 1995 The American Physical Society.
引用
收藏
页码:4047 / 4050
页数:4
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