ELEMENTARY EXCITATION IN THE HALDANE STATE

被引：101

作者：

DATE, M

KINDO, K

机构：

[1] Department of Physics, Faculty of Science, Osaka University, Toyonaka

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.65.1659

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A localized two-spin bound state with the resultant spin S=1 is proposed as an elementary excitation of the Haldane state in Ni(C2H8N2)NO2(ClO4) (NENP) and Ni(C3H10N2)NO2(ClO4) (NINO). The bound state corresponds to the lowest excited triplet and behaves like a soliton or a small exciton. An ESR study has been done, and the resonance of the two-spin bound state is observed. The result is satisfactorily explained by the spin-cluster model and supports the Haldane conjecture. Various magnetic properties of NENP and NINO are well explained by the present model. © 1990 The American Physical Society.

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页码：1659 / 1662

页数：4

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