中国物理B ›› 1996, Vol. 5 ›› Issue (11): 849-856.doi: 10.1088/1004-423X/5/11/007

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THE EFFECT OF DIRECT f-f HOPPING ON THE HYBRIDIZATION GAP INSULATING BEHAVIOR OF THE PERIODIC ANDERSON LATTICE

林宗涵1, 胡梁宾2, 杨富民2, 孙金祚2   

  1. (1)Chinese Center of Advanced Science and Technology (CCAST) (World Laboratory), Beijing 100080, China and Department of Physics, Peking University, Beijing 100871, China; (2)Department of Physics, Yantai University, Yantai 264005, China
  • 收稿日期:1996-01-30 修回日期:1996-05-17 出版日期:1996-11-20 发布日期:1996-11-20

THE EFFECT OF DIRECT f-f HOPPING ON THE HYBRIDIZATION GAP INSULATING BEHAVIOR OF THE PERIODIC ANDERSON LATTICE

HU LIANG-BIN (胡梁宾)a, YANG FU-MIN (杨富民)a, SUN JIN-ZUO (孙金祚)a, LIN ZONG-HAN (林宗涵)b   

  1. a Department of Physics, Yantai University, Yantai 264005, China; b Chinese Center of Advanced Science and Technology (CCAST) (World Laboratory), Beijing 100080, China and Department of Physics, Peking University, Beijing 100871, China
  • Received:1996-01-30 Revised:1996-05-17 Online:1996-11-20 Published:1996-11-20

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摘要： By using the well known slave-boson technique and within the framework of mean field approximation, we study the effect of the direct f-f hopping on the low-temperature hybridization gap insulating behavior of the periodic Anderson lattice. The results show that the direct f-f hopping will decrease the hybridization gap or lead it to vanish. In the latter case, the lattice will exhibit no hybridization gap insulating behavior even if the lower renormalized band is fully occupied.

Abstract: By using the well known slave-boson technique and within the framework of mean field approximation, we study the effect of the direct f-f hopping on the low-temperature hybridization gap insulating behavior of the periodic Anderson lattice. The results show that the direct f-f hopping will decrease the hybridization gap or lead it to vanish. In the latter case, the lattice will exhibit no hybridization gap insulating behavior even if the lower renormalized band is fully occupied.

中图分类号:  (Valence fluctuation, Kondo lattice, and heavy-fermion phenomena)

  • 75.30.Mb
75.10.-b (General theory and models of magnetic ordering)