Evolution of the Coulomb gap in tunnel-coupled quantum dots

被引:29
作者
Crouch, CH
Livermore, C
Westervelt, RM
Campman, KL
Gossard, AC
机构
[1] HARVARD UNIV,DEPT PHYS,CAMBRIDGE,MA 02138
[2] UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106
关键词
D O I
10.1063/1.119656
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report differential conductance measurements through a double quantum dot with adjustable interdot tunneling rate. The Coulomb gap of the double dot decreases continuously as the interdot tunnel conductance G(int) is increased, from the gap of two isolated dots (when G(int)similar to 0) to the gap of a single large dot of twice the total capacitance (when G(int) = 2e(2)/h). Excited electronic states in differential conductance measurements on single dots show a spectrum which is essentially independent of the number of electrons in the dot, but is not uniform. (C) 1997 American Institute of Physics.
引用
收藏
页码:817 / 819
页数:3
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