DIRECT OBSERVATION OF THE HALDANE GAP IN NENP BY FAR-INFRARED SPECTROSCOPY IN HIGH MAGNETIC-FIELDS

被引：105

作者：

LU, W

TUCHENDLER, J

VONORTENBERG, M

RENARD, JP

机构：

[1] UNIV PARIS 06,DISPOSITIFS INFRAROUGE & MICROONDES,F-75252 PARIS,FRANCE

[2] UNIV PARIS 11,INST ELECTR FONDAMENTALE,F-91405 ORSAY,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.67.3716

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first direct and comprehensive determination of the energy levels involved in the Haldane gap occurrence: the singlet ground state and the first triplet excited state. Precise values of the parameters are obtained from the analysis of the magneto-optical resonance transitions observed in the far infrared for frequencies ranging from 70 to 1000 GHz and magnetic fields up to 18 T.

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页码：3716 / 3719

页数：4

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