Electron-phonon coupling mechanism in two-dimensional graphite and single-wall carbon nanotubes

被引：58

作者：

Samsonidze, Ge. G. ^{[1
]}

Barros, E. B.

Saito, R.

Jiang, J.

Dresselhaus, G.

Dresselhaus, M. S.

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil

[3] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[4] JST, CREST, Aoba Ku, Sendai, Miyagi 9808578, Japan

[5] MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA

[6] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.75.155420

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electron-phonon coupling in two-dimensional graphite and metallic single-wall carbon nanotubes is analyzed. The highest-frequency phonon mode at the K point in two-dimensional graphite opens a dynamical band gap that induces a Kohn anomaly. Similar effects take place in metallic single-wall carbon nanotubes that undergo Peierls transitions driven by the highest-frequency phonon modes at the Gamma and K points. The dynamical band gap induces a nonlinear dependence of the phonon frequencies on the doping level and gives rise to strong anharmonic effects in two-dimensional graphite and metallic single-wall carbon nanotubes.

引用

页数：8

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