Conductance of Aharonov-Bohm interferometers embedded with an interacting dot: slave-boson mean-field calculation

被引：1
|
作者：
Takagaki, Y [1 ]
Ploog, KH [1 ]
机构：
[1] Paul Drude Inst Festkorperelektron, D-10117 Berlin, Germany
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2005年 / 242卷 / 15期
关键词：
D O I：
10.1002/pssb.200541025
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We numerically calculate the conductance of a one-dimensional Aharonov-Bohm loop containing a weakly coupled dot. The Coulomb repulsion is taken into account in the dot within the slave-boson mean-field approximation. We avoid the so-called phase locking by attaching an additional lead to the loop. The phase of the electron wavefunction deduced from the Aharonov-Bohm oscillation changes gradually by pi when the Fermi energy sweeps across a transmission resonance in the dot. The asymmetric lineshape of Fano-type resonances is also examined. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：3155 / 3162
页数：8
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