Junctions of one-dimensional quantum wires:: Correlation effects in transport -: art. no. 205327

被引：44
|
作者：
Barnabé-Thériault, X [1 ]
Sedeki, A [1 ]
Meden, V [1 ]
Schönhammer, K [1 ]
机构：
[1] Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany
来源：
PHYSICAL REVIEW B | 2005年 / 71卷 / 20期
关键词：
D O I：
10.1103/PhysRevB.71.205327
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate transport of spinless fermions through a single site dot junction of M one-dimensional quantum wires. The semi-infinite wires are described by a tight-binding model. Each wire consists of two parts, the noninteracting leads and a region of finite extent in which the fermions interact via a nearest-neighbor interaction. The functional renormalization group method is used to determine the flow of the linear conductance as a function of a low-energy cutoff for a wide range of parameters. Several fixed points are identified and their stability is analyzed. We determine the scaling exponents governing the low-energy physics close to the fixed points. Some of our results can already be derived using the non-self-consistent Hartree-Fock approximation.
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页数：13
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