ELECTRONIC STATES IN THE VALENCE-FLUCTUATING ORGANIC CONDUCTORS (DCNQI)2CU(DCNQI=N,N'-DICYANOQUINONEDIIMINE) STUDIED BY ULTRAVIOLET PHOTOEMISSION SPECTROSCOPY

被引：14

作者：

INOUE, IH

WATANABE, M

KINOSHITA, T

KAKIZAKI, A

KATO, R

KOBAYASHI, A

KOBAYASHI, H

FUJIMORI, A

机构：

[1] UNIV TOKYO,INST SOLID STATE PHYS,SYNCHROTRON RADIAT LAB,TANASHI,TOKYO 188,JAPAN

[2] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

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

[4] TOHO UNIV,DEPT CHEM,FUNABASHI,CHIBA 274,JAPAN

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

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.47.12917

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ultraviolet photoemission spectra near the Fermi level of quasi-one-dimensional organic conductors, (DMe-DCNQI)2Cu and (Me,Br-DCNQI)2Cu, where DMe is dimethyl, have been studied using undulator radiation. We have found no evidence for sharp Fermi edges in both salts, as was observed in other one-dimensional conductors; the existence of Cu 3d character was found near the Fermi level in (DMe-DCNQI)2Cu. This indicates that, in the metallic DCNQI-Cu systems, 3d electrons are hybridized with the p(pi) conduction band at the Fermi level, which is consistent with the valence-fluctuation picture of Cu. We have also observed the gap opening in (Me,Br-DCNQI)2Cu, where Me is methyl, below the critical temperature of the metal-insulator transition.

引用

收藏

页码：12917 / 12920

页数：4

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