Pressure-induced phenomena in single-walled carbon nanotubes probed by infrared spectroscopy

被引：8

作者：

Abouelsayed, A. ^{[1
]}

Thirunavukkuarasu, K. ^{[1
]}

Kamaras, K. ^{[2
]}

Hennrich, F. ^{[3
]}

Kuntscher, C. A. ^{[1
]}

机构：

[1] Univ Augsburg, D-86135 Augsburg, Germany

[2] Res Inst Solid State Phys & Opt, Budapest, Hungary

[3] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

HIGH PRESSURE RESEARCH | 2009年 / 29卷 / 04期

关键词：

infrared spectroscopy; single-walled carbon nanotubes; structural phase transition; OPTICAL-ABSORPTION SPECTRA; DEPENDENCE;

D O I：

10.1080/08957950903371708

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic properties of films of unoriented single-walled carbon nanotubes were studied by transmission measurements as a function of pressure. The energies of the optical transitions between the Van Hove singularities decrease with increasing pressure, which can be attributed to pressure-induced hybridization and symmetry-breaking effects. We observe an anomaly in the pressure-induced shift of the optical transitions at around 2GPa due to a structural phase transition. The low-energy absorbance monotonically decreases with increasing pressure, suggesting an increasing carrier localization.

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收藏

页码：559 / 563

页数：5

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