SPIN DYNAMICS IN AN ISING-LIKE QUANTUM SPIN CHAIN WITH NONMAGNETIC IMPURITIES

被引：0
作者：
ITOH, S
IKEDA, H
SUGIMOTO, D
IWASA, K
ECCLESTON, RS
机构：
[1] KEIO UNIV, DEPT PHYS, YOKOHAMA, KANAGAWA 223, JAPAN
[2] RUTHERFORD APPLETON LAB, ISIS FACIL, DIDCOT OX11 0QX, OXON, ENGLAND
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 03期
关键词：
ISING-LIKE ANTIFERROMAGNETIC CHAIN; NONMAGNETIC IMPURITY; CSCOCMG1-CCL3; SPIN DYNAMICS; EXCHANGE INTERACTION; INELASTIC NEUTRON SCATTERING;
D O I：
10.1143/JPSJ.64.927
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Neutron inelastic-scattering experiments on an Ising-like quantum antiferromagnetic chain with nonmagnetic impurities, CsCocMg1-cCl3 (c=1, 0.95, 0.9, 0.85, 0.6 and 0.4), were performed. The concentration dependence of the spin dynamics showed that although the solitons and the spin-wave continuum state were stable for a small amount of nonmagnetic impurities, they vanished at c=0.8. We also observed the coexistence of Ising-cluster excitations and intra-cluster excitations at low temperatures. These results can be well interpreted by a theory incorporated with next nearest-neighbor interactions in the chain.
引用
收藏
页码：927 / 933
页数：7
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