PRESSURE-DRIVEN NEUTRAL-IONIC PHASE-TRANSITION IN TETRATHIAFULVALENE-2,5-DICHLORO-PARA-BENZOQUINONE - EXAMPLE OF CONTINUOUS IONICITY CHANGE

被引:11
作者
BRILLANTE, A [1 ]
GIRLANDO, A [1 ]
机构
[1] UNIV PARMA,IST CHIM FIS,I-43100 PARMA,ITALY
来源
PHYSICAL REVIEW B | 1992年 / 45卷 / 13期
关键词
D O I
10.1103/PhysRevB.45.7026
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The infrared spectra of tetrathiafulvalene-2,5-dichloro-p-benzoquinone charge-transfer complex have been measured as a function of pressure up to a maximum of 11.9 GPa. A careful interpretation of the data shows that the ionicity of the complex increases steadily with pressure, going from values inherent to a quasineutral (N) ground state to values inherent to a quasi-ionic (I) one. The N-I borderline is crossed without jumps in ionicity in correspondence with a Peierls phase transition starting at 3.8 GPa (midpoint at approximately 5 GPa). This experiment shows that a N-I transition can occur also through a continuous ionicity change.
引用
收藏
页码:7026 / 7030
页数:5
相关论文
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