TEMPERATURE-INDUCED NEUTRAL-IONIC TRANSITION IN TETRAMETHYLBENZIDINE-TETRACYANOQUINODIMETHANE (TMB-TCNQ)

被引：83

作者：

IWASA, Y

KODA, T

TOKURA, Y

KOBAYASHI, A

IWASAWA, N

SAITO, G

机构：

[1] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN

[2] UNIV TOKYO,DEPT CHEM,TOKYO 113,JAPAN

[3] UNIV TOKYO,INST SOLID STATE PHYS,TOKYO 106,JAPAN

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.42.2374

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental evidence is presented that indicates the occurrence of a temperature-induced neutral-ionic transition occurring at Tc 205 K in the mixed-stack organic charge-transfer crystal, 3,3,5,5 -tetramethylbenzidine-7,7, 8,8-tetracyanoquinodimethane (TMB-TCNQ). The transition is characterized by a large first-order-like jump in the magnetic susceptibility and a dimeric distortion of the stacks similar to those observed in tetrathiafulvalene- chloranil (TTF-CA). However, contrary to the case in TTF-CA the molecular ionicity jump at Tc is comparatively small in TMB-TCNQ. The nature of this transition observed in TMB-TCNQ is discussed drawing comparisons with that seen in TTF-CA. © 1990 The American Physical Society.

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页码：2374 / 2377

页数：4

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