中国物理B ›› 2000, Vol. 9 ›› Issue (8): 615-618.doi: 10.1088/1009-1963/9/8/012

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CHARGE AND SPIN GAPS IN THE DIMERIZED HUBBARD MODEL

丁国辉, 叶飞, 许伯威   

  1. Department of physics, Shanghai Jiaotong university, Shanghai 200030, China
  • 收稿日期:2000-03-03 出版日期:2000-08-15 发布日期:2005-06-10
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 19975031) and the RFDP (Grant No. 199024833).

CHARGE AND SPIN GAPS IN THE DIMERIZED HUBBARD MODEL

Ding Guo-hui (丁国辉), Ye Fei (叶飞), Xu Bo-wei (许伯威)   

  1. Department of physics, Shanghai Jiaotong university, Shanghai 200030, China
  • Received:2000-03-03 Online:2000-08-15 Published:2005-06-10
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 19975031) and the RFDP (Grant No. 199024833).

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摘要： By using the bosonization and renormalization group methods, we have studied the low energy physical properties in the one-dimensional dimerized Hubbard model. The formation of charge and spin gaps is investigated both for the half-filled electron band and away from the half-filled band. The scaling laws of the charge and spin gaps with the dimerization parameterΔ and the repulsive interaction strength U are obtained.

Abstract: By using the bosonization and renormalization group methods, we have studied the low energy physical properties in the one-dimensional dimerized Hubbard model. The formation of charge and spin gaps is investigated both for the half-filled electron band and away from the half-filled band. The scaling laws of the charge and spin gaps with the dimerization parameter $\varDelta$ and the repulsive interaction strength U are obtained.

Key words: dimerized hubbard model, charge and spin gaps

中图分类号:  (Band and itinerant models)

  • 75.10.Lp