Chin. Phys. Lett.  2002, Vol. 19 Issue (1): 111-113    DOI:
Original Articles |
D-Wave Kondo Problem in a Square Tight-Bounding Lattice
YANG Kai-Hua1;SONG Bo2;WANG Yu-Peng2;HAN Ru-Shan3
1Institute of Microelectronics, Peking University, Beijing 100871 2Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080 3Department of Physics, Peking University, Beijing 100871
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YANG Kai-Hua, SONG Bo, WANG Yu-Peng et al  2002 Chin. Phys. Lett. 19 111-113
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Abstract A Kondo model in a square tight-bonding lattice of conduction electrons is considered. The Kondo interaction takes a d-wave. Using mean-field theory and numerical simulations, it is found that there is a pseudo-gap for the impurity density of states at the Fermi level. Numerical results also show that the exponents of the low-temperature thermodynamic quantities are non-universal but dependent on the interaction.
Keywords: 71.15.Fv      75.30.Hx      71.23.-k      05.70.-a     
Published: 01 January 2002
PACS:  71.15.Fv  
  75.30.Hx (Magnetic impurity interactions)  
  71.23.-k (Electronic structure of disordered solids)  
  05.70.-a (Thermodynamics)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2002/V19/I1/0111
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