Size-dependence of the anharmonicities in the vibrational potential of colloidal CdSe nanocrystals

被引：29

作者：

Kusch, Patryk ^{[1
]}

Lange, Holger ^{[2
]}

Artemyev, Mikhail ^{[3
]}

Thomsen, Christian ^{[2
]}

机构：

[1] Free Univ Berlin, Inst Expt Phys, D-1000 Berlin, Germany

[2] Tech Univ Berlin, Inst Festkorperphys, D-1000 Berlin, Germany

[3] Belorussian State Univ, Inst Phys Chem Problems, Minsk, BELARUS

来源：

SOLID STATE COMMUNICATIONS | 2011年 / 151卷 / 01期

关键词：

Colloidal semiconductor nanocrystals; Phonons; Temperature dependence; Raman scattering; RAMAN-SCATTERING; PHONONS; SPECTRA; SILICON; SHAPE;

D O I：

10.1016/j.ssc.2010.10.023

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We investigated multi-phonon processes in two types of CdSe nanocrystals spherical quantum dots and nanorods by temperature-dependent Raman spectroscopy We find the anharmonic constants relating to the two- and three-phonon decay channels to systematically change with changing nanocrystal size The contributions from two-phonon processes decrease with decreasing diameter while the contributions from higher-order processes increase The anharmonicities in the vibrational potential increase due to the phonon confinement and we did not find a shape dependence (C) 2010 Elsevier Ltd All rights reserved

引用

页码：67 / 70

页数：4

共 36 条

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