PROPAGATING S=1/2 PARTICLES IN S=1 HALDANE-GAP SYSTEMS

被引：32

作者：

PENC, K

SHIBA, H

机构：

[1] Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.52.R715

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Inspired by the recent experiments on Y2-xCaxBaNiO5, we discuss the dispersion relation of the S=1/2 particles in the S=1 Heisenberg and valence bond solid model in the limit of small hopping amplitudes. The effective S=1/2 edge spins mix with the spin of the impurity resulting in one fourfold and two twofold degenerate bands. We briefly discuss the interaction between the S=1/2 particles arising from the background.

引用

页码：R715 / R718

页数：4

共 24 条

[1]

Haldane F.D.M., Phys. Rev. Lett., 50, (1983)

[2]

Haldane F.D.M., Phys. Lett., 93 A, (1983)

[3]

Buttrey D.J., Sullivan J.D., Rheingold A.B., J. Solid State Chem., 88, (1990)

[4]

Amador J., Et al., Phys. Rev. B, 42, (1990)

[5]

Saez Puche R., Et al., J. Solid State Chem., 93, (1991)

[6]

Darriet J., Regnault L.P., Solid State Commun., 86, (1993)

[7]

Batlogg B., Cheong S.W., Rupp L.W., Haldane spin state in Y2Ba(Ni, Zn or Mg)O5, Physica B: Condensed Matter, 194-196, (1994)

[8]

Mattheiss L.F., Physical Review B, 48, (1993)

[9]

DiTusa J.F., Et al., Physical Review Letters, 73, (1994)

[10]

S o rensen E.S., Affleck I.

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