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作者:

Yang, Kai-Hua (Yang, Kai-Hua.) | Chen, Yang (Chen, Yang.) | Wang, Huai-Yu (Wang, Huai-Yu.) | Liu, Bei-Yun (Liu, Bei-Yun.)

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EI Scopus SCIE

摘要:

We theoretically investigate the density of states (DOS) of a quantum dot weakly coupled to Luttinger liquid (LL) leads in the Kondo regime by use of the equation-of-motion technique of the nonequilibrium Green functions. At zero temperature, the Kondo peak in DOS is suppressed by the intralead interaction. When the LL interaction parameter K is about 0.77, a moderately strong interaction, the Kondo peak disappears and then a dip develops, a signature of the intermediate two-channel Kondo (2CK) physics. This shows that the condition for the 2CK to occur ever addressed is not necessary. Applying a finite voltage bias splits the dip in the DOS. Each split dip is located at the chemical potential of a LL lead. This again appears the stabilized 2CK physics for moderately strong interaction K < 1. (c) 2013 Elsevier B.V. All rights reserved.

关键词:

Density of state Kondo dot Luttinger liquid

作者机构:

  • [ 1 ] [Yang, Kai-Hua]Beijing Univ Technol, Coll Appl Sci, Beijing 100122, Peoples R China
  • [ 2 ] [Chen, Yang]Beijing Univ Technol, Coll Appl Sci, Beijing 100122, Peoples R China
  • [ 3 ] [Liu, Bei-Yun]Beijing Univ Technol, Coll Appl Sci, Beijing 100122, Peoples R China
  • [ 4 ] [Wang, Huai-Yu]Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

通讯作者信息:

  • [Yang, Kai-Hua]Beijing Univ Technol, Coll Appl Sci, Beijing 100122, Peoples R China

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来源 :

PHYSICS LETTERS A

ISSN: 0375-9601

年份: 2013

期: 9

卷: 377

页码: 687-693

2 . 6 0 0

JCR@2022

ESI学科: PHYSICS;

JCR分区:2

中科院分区:3

被引次数:

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