Resonant tunneling through a quantum dot weakly coupled to quantum wires or quantum Hall edge states

被引:127
作者
Furusaki, A [1 ]
机构
[1] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
来源
PHYSICAL REVIEW B | 1998年 / 57卷 / 12期
关键词
D O I
10.1103/PhysRevB.57.7141
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Resonant tunneling through a quantum dot weakly coupled to Tomonaga-Luttinger liquids is discussed. The linear conductance due to sequential tunneling is calculated by solving a master equation for temperatures below and above the average level spacing in the dot. When the parameter g characterizing the Tomonaga-Luttinger liquid is smaller than 1/2, the resonant tunneling process is incoherent down to zero temperature. At low temperature T the height and width of the conductance peaks in the Coulomb blockade oscillations are proportional to T1/g-2 and T, respectively. The contribution from tunneling via a virtual intermediate state (cotunneling) is also included. The resulting conductance formula can be applied for the resonant tunneling between edge states of fractional quantum Hall liquids with filling factor nu=1/(2m+1)=g.
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收藏
页码:7141 / 7148
页数:8
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