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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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| Cite this article: |
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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.
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| Keywords:
71.28.+d
71.30.+h
71.45.Lr
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Published: 01 January 1997
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| PACS: |
71.28.+d
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(Narrow-band systems; intermediate-valence solids)
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71.30.+h
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(Metal-insulator transitions and other electronic transitions)
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71.45.Lr
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(Charge-density-wave systems)
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