Impact excitation by hot carriers in carbon nanotubes

被引：70

作者：

Perebeinos, Vasili ^{[1
]}

Avouris, Phaedon ^{[1
]}

机构：

[1] IBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 12期

关键词：

EXCITONS; EMISSION;

D O I：

10.1103/PhysRevB.74.121410

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate theoretically the efficiency of intramolecular hot-carrier-induced impact ionization and excitation processes in carbon nanotubes. The electron confinement and reduced screening lead to drastically enhanced excitation efficiencies over those in bulk materials. Strong excitonic coupling favors neutral excitations over ionization, while the impact mechanism populates a different set of states than that produced by photoexcitation. The excitation rate is strongly affected by optical phonon excitation and a simple scaling of the rate with the field strength and optical phonon temperature is obtained.

引用

页数：4

共 23 条

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