Polarized reflectance spectra of organic metals α- and κ-(BEDT-TTF)2Cu(NCS)2 and κ-(BEDT-TTFd8)2Cu(NCS)2

被引：0

作者：

Tokumoto, M. ^{[1
]}

Anzai, H. ^{[1
]}

Takahashi, K. ^{[1
]}

Kinoshita, N. ^{[1
]}

Murata, K. ^{[1
]}

Ishiguro, T. ^{[1
]}

Tanaka, Y. ^{[1
]}

Hayakawa, Y. ^{[1
]}

Nagamori, H. ^{[1
]}

Nagasaki, K. ^{[1
]}

机构：

[1] Electrotechnical Lab, Japan

来源：

Synthetic Metals | 1988年 / 27卷 / 1-2期

关键词：

Crystals--Structure; -; Organometallics;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Polarized reflectance spectra of two different phases (α- and κ-) of (BEDT-TTF (tetrathiafulvalene)2Cu(NCS)2 as well as κ-(BEDT-TTFd8)2Cu(NCS)2 were measured over the spectral range from 800 cm-1 to 9000 cm-1. A reflectance drop with the plasma-edge like dispersion was observed for polarization parallel to any directions in the conducting b-c plane in both κ-(BEDT-TTF)2Cu(NCS)2 and κ-(BEDT-TTFd8)2Cu(NCS)2. Small in-plane anisotropy reflects the characteristic stacking configuration of dimerized BEDT-TTF molecules in the crystal structure similar to κ-(BEDT-TTF)2I3 rather than the highly two-dimensional electronic structure within the conducting plane. In contrast, optical properties of α-(BEDT-TTF)2Cu(NCS)2, having a herring-bone type stacking of donors, was found to show higher reflectivity when the polarization was perpendicular to the stacking direction similar to the case of α-(BEDT-TTF)2I3.

引用

页码：171 / 176