Raman and infrared-active modes in MS2 nanotubes (M = Mo,W)

被引：20

作者：

Dobardzic, E. ^{[1
]}

Milosevic, I. ^{[1
]}

Dakic, B. ^{[1
]}

Damnjanovic, M. ^{[1
]}

机构：

[1] Univ Belgrade, Fac Phys, Belgrade 11001, Serbia

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.74.033403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Lattice dynamics of all the single-wall MS2 nanotubes with a diameter range of 1-20 nm is studied within full symmetry implemented valence-force-field model. Particularly, frequencies of infrared and Raman active modes are examined to clarify possible application of these methods in the experimental sample characterization. A prescription for experimental distinction of zig-zag, armchair and chiral tubes, based on their different symmetry and resulting selection rules, is proposed. Displacements significantly depend on the chiral angle only for two MoS2 modes, namely twisting in phase (rigid layer) and breathing out of phase, and none of WS2 modes.

引用

页数：4

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