X-RAY EVIDENCE FOR 2K(F) CHARGE-DENSITY-WAVE INSTABILITY IN TETRATELLURAFULVALENE-TETRACYANOQUINODIMETHANE TTEF-TCNQ

被引：1

作者：

POUGET, JP ^{[1
]}

MAYS, MD ^{[1
]}

COWAN, DO ^{[1
]}

机构：

[1] JOHNS HOPKINS UNIV,DEPT CHEM,BALTIMORE,MD 21218

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1995年 / 5卷 / 10期

关键词：

D O I：

10.1039/jm9950501629

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report an X-ray diffuse scattering study of the charge-transfer salt TTeF-TCNQ. This salt develops one-dimensional (1D) 2k(F) charge density wave (CDW) structural fluctuations which do not condense into superlattice spots down to 20 K, the lowest temperature investigated. This observation allows a charge transfer value of rho=0.70+/-0.02 to be determined, in good agreement with a previous IR spectroscopy determination. We compare these CDW structural fluctuations with those previously observed in other charge-transfer salts like TTF-TCNQ and TSF-TCNQ which undergo a Peierls transition. We suggest that the increase of donor polarizability and of donor bandwidth on going from TTF-TCNQ to TSF-TCNQ, and then to TTeF-TCNQ, makes the CDW instability different between these salts.

引用

页码：1629 / 1631

页数：3

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