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.

引用

页数：13

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