CHARGE TRANSFER-CONTROLLED PHASE-TRANSITION IN A MOLECULAR CONDUCTOR, (DME-DCNQI)(2)CU-DOPING EFFECT

被引：21

作者：

SAWA, H

TAMURA, M

AONUMA, S

KINOSHITA, M

KATO, R

机构：

[1] The Institute for Solid State Physics, The University of Tokyo, Roppongi, Minato-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 12期

关键词：

DCNQI; COPPER; DOPING EFFECT; MOLECULAR CONDUCTOR; METAL-INSULATOR TRANSITION; DEUTERIUM; CHARGE TRANSFER; REENTRANT TRANSITION;

D O I：

10.1143/JPSJ.63.4302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Li+ doping in the Cu salt of deuterated DMe-DCNQI-d(7), has shown drastic effects on electrical and magnetic properties. Undoped (DMe-DCNQI-d(7))(2)Cu exhibits a first-order metal;insulator (M-I) transition at 80 K. A small amount of Li+-doping suppresses the M-I transition. The M-I-M (reentrant) transition, which is Similar to that in selectively deuterated (DMe-DCNQI)(2)Cu, appears in a narrow region of Li content x. The x-T phase diagram under ambient pressure well reproduces the P-T phase diagram of the (DMe-DCNQI)(2)Cu system. This doping effect is explained by the change in charge transfer amount from metal ions to DCNQI molecules. The effect of pressure or deuteration on the M-I transition in the DCNQI(2)Cu system is generally understood from this viewpoint.

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页码：4302 / 4305

页数：4

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