中国物理B ›› 2007, Vol. 16 ›› Issue (7): 2096-2100.doi: 10.1088/1009-1963/16/7/049

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Electronic transport properties of the single-impurity Anderson model

陈明伦1, 王顺金2   

  1. (1)Department of Physics, Sichuan University, Chengdu 610064, China; (2)Department of Physics, Sichuan University, Chengdu 610064, China;Center of Theoretical Nuclear Physics of Heavy Ion Facilities of Lanzhou, Lanzhou 730000, China
  • 收稿日期:2006-09-25 修回日期:2007-01-12 出版日期:2007-07-20 发布日期:2007-07-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10375039 and 90503008), the Doctoral Fund of Ministry of Education of China, and the Center of Theoretical Nuclear Physics of Heavy Ion Facilities of Lanzhou of China.

Electronic transport properties of the single-impurity Anderson model

Chen Ming-Lun(陈明伦)a) and Wang Shun-Jin(王顺金)a)b)   

  1. a Department of Physics, Sichuan University, Chengdu 610064, China; b Center of Theoretical Nuclear Physics of Heavy Ion Facilities of Lanzhou, Lanzhou 730000, China
  • Received:2006-09-25 Revised:2007-01-12 Online:2007-07-20 Published:2007-07-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10375039 and 90503008), the Doctoral Fund of Ministry of Education of China, and the Center of Theoretical Nuclear Physics of Heavy Ion Facilities of Lanzhou of China.

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摘要： We investigate the electronic transport properties of the single-impurity Anderson model. By employing the cluster expansions, the equations of motion of Green's functions are transformed into the corresponding equation of motion of connected Green's functions, which contains the correlation of two conduction electrons beyond the Lacroix approximation. With the method we show that the asymmetric line shape of zero bias conductance manifests itself as the Fano effect, and the Kondo effect is observed in the narrow peak of differential conductance curve of the system. The Fano and the Kondo effects can coexist in the single-impurity Anderson model when the impurity level is adjusted to an appropriate position.

关键词: Anderson model, Fano effect, Kondo effect

Abstract: We investigate the electronic transport properties of the single-impurity Anderson model. By employing the cluster expansions, the equations of motion of Green's functions are transformed into the corresponding equation of motion of connected Green's functions, which contains the correlation of two conduction electrons beyond the Lacroix approximation. With the method we show that the asymmetric line shape of zero bias conductance manifests itself as the Fano effect, and the Kondo effect is observed in the narrow peak of differential conductance curve of the system. The Fano and the Kondo effects can coexist in the single-impurity Anderson model when the impurity level is adjusted to an appropriate position.

Key words: Anderson model, Fano effect, Kondo effect

中图分类号:  (Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))

  • 72.10.Fk
73.63.Kv (Quantum dots)