Temperature dependence of the band gap in C-60 crystals

被引：27

作者：

Chiu, KC

Wang, JS

Lin, CY

机构：

[1] Department of Physics, Chung-Yuan Christian University, Chung-Li

来源：

JOURNAL OF APPLIED PHYSICS | 1996年 / 79卷 / 03期

关键词：

D O I：

10.1063/1.360969

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The temperature dependence (13-300 K) of the optical-allowed direct band gap E(g)(T) deduced from the transmission and photoconductivity spectra in high-quality C-60 crystals is presented. A strong temperature-dependent E(g)(T) is observed and attributed to the electron-phonon interaction via the localized C-60 phonon modes. In addition, a discontinuous change for dE(g)/dT around 249 K is reported due to the orientational order/disorder phase transition. Finally, three discrete localized bands are observed and the photoconduction for these localized bands is discussed in terms of photothermal ionization. (C) 1996 American Institute of Physics.

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页码：1784 / 1787

页数：4

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