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

被引：104
|
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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