Chin. Phys. Lett.  1997, Vol. 14 Issue (1): 63-66    DOI:
Original Articles |
Influence of Strong Electron-Electron Interaction on the Peierls Transition
HU Lian1;K.Y. Szeto2;SUN Xin3
1Department of Physics, South China Normal University, Guangzhou 510631 2Department of Physics, The Hong Kong University of Science and Technology, Hong Kong 3Department of Physics, Fudan University, Shanghai 200433
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HU Lian, K.Y. Szeto, SUN Xin 1997 Chin. Phys. Lett. 14 63-66
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Abstract The influence of short-ranged Coulomb repulsion of strongly correlated electrons on the Peierls transition for a quasi-one-dimensional system is investigated. It shows that the influence varies with the band filling and proves that the condition of single-occupation leads to a singularity on the density of states at half-filling which enhances dimerization. It also shows that dimerization is suppressed by the increase of U in the region of large-U and proves that increasing nearest-neighbor interaction V will suppress the Peierls transition temperature at half-filling, and strongly enhance it for band-filling at n ≈ 1/4, which means the enhancement of tetramer-ization for a quarter-filled band.
Keywords: 71.28.+d      71.30.+h      71.45.Lr     
Published: 01 January 1997
PACS:  71.28.+d (Narrow-band systems; intermediate-valence solids)  
  71.30.+h (Metal-insulator transitions and other electronic transitions)  
  71.45.Lr (Charge-density-wave systems)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1997/V14/I1/063
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