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

页码：7026 / 7030

页数：5

共 21 条

[1]

BERTHOLIN H, 1987, SOLID STATE COMMUN, V63, P223

[2] VIBRATIONAL SPECTROSCOPY OF MIXED STACK ORGANIC SEMICONDUCTORS - NEUTRAL AND IONIC PHASES OF TETRATHIAFULVALENE CHLORANIL (TTF-CA) CHARGE-TRANSFER COMPLEX [J].