Kondo Effect in Two-Dimensional Disordered Electron Systems | Zendy

Sei-ichiro Suga | Zendy; Takuma Ohashi | Zendy

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Kondo Effect in Two-Dimensional Disordered Electron Systems

Author(s) -

Sei-ichiro Suga,

Takuma Ohashi

Publication year - 2003

Publication title -

journal of the physical society of japan

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.76

H-Index - 139

eISSN - 1347-4073

pISSN - 0031-9015

DOI - 10.1143/jpsjs.72sa.139

Subject(s) - condensed matter physics , kondo effect , randomness , physics , electron , anderson impurity model , spin (aerodynamics) , thermal conduction , magnetic moment , moment (physics) , monte carlo method , conduction electron , quantum mechanics , mathematics , thermodynamics , statistics

We investigate the Kondo effect in two-dimensional disordered electronsystems using a finite-temperature quantum Monte Carlo method. Depending on theposition of a magnetic impurity, the local moment is screened or unscreened bythe spin of the conduction electron. On the basis of the results, we show thatthe distribution of the Kondo temperature becomes wide and the weight at$T_K=0$ becomes large as randomness increases. The average susceptibility showsa weak power-law or logarithmic divergence at low temperature, indicating anon-Fermi-liquid behavior.Comment: 2 pages, 2 figures, to be published in supplement of J. Phys. Soc. Japan, Proceedings of Localisation 2002, (Tokyo, Japan, 2002

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