GROUND-STATE PROPERTIES OF THE S=1/2 HEISENBERG-ANTIFERROMAGNET ON A TRIANGULAR LATTICE - A NUMERICAL STUDY OF A FINITE CELL

被引:10
作者
DEUTSCHER, R [1 ]
EVERTS, HU [1 ]
MIYASHITA, S [1 ]
WINTEL, M [1 ]
机构
[1] KYOTO UNIV, COLL LIBERAL ARTS & SCI, DEPT PHYS, KYOTO 606, JAPAN
来源
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1990年 / 23卷 / 19期
关键词
D O I
10.1088/0305-4470/23/19/005
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The authors study numerically a 21-site Marland-Betts type cell of the S=1/2 Heisenberg antiferromagnet on a triangular lattice with nearest-neighbour (NN) and next-nearest-neighbour (NNN) couplings. The emphasis is on a comparison of the classical picture of this model with its quantum properties. By considering the structure function S(k) they demonstrate that there is a close connection between the classical and the quantum ground states of the system. Contrary to a previous conjecture they find no significant enhancement of the chiral order parameter with increasing strength of the NNN coupling.
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页码:L1043 / L1051
页数:9
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