ACOUSTIC POLARON IN CYLINDRICAL QUANTUM WIRES

被引：6

作者：

Hou, Junhua ^{[1
,2
,3
]}

Liang, X. X. ^{[4
]}

Zhou, Xin ^{[1
]}

机构：

[1] Shanxi Normal Univ, Coll Phys & Informat Engn, Linfen 041004, Peoples R China

[2] Shenzhen Univ, Shenzhen 518060, Guangdong, Peoples R China

[3] Minist Educ, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Guangdong, Peoples R China

[4] Inner Mongolia Univ, Dept Phys, Hohhot 010021, Peoples R China

来源：

MODERN PHYSICS LETTERS B | 2012年 / 26卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Electron-longitudinal acoustic-phonon interaction; acoustic polaron; self-trapping; SELF-TRAPPING TRANSITION; ONE-DIMENSION; PHASE-TRANSITION; GROUND-STATE; DISCONTINUITY; ELECTRONS; GAN;

D O I：

10.1142/S0217984911500370

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ground state energies and the derivates of the acoustic polaron in cylindrical quantum wire systems are performed by using the Huybrechts-like variational approach. The criterions for presence of the self-trapping transition of the acoustic polaron in cylindrical quantum wires are determined qualitatively. It is found that the critical coupling constant for the discontinuous transition from a quasi-free state to a trapped state of the acoustic polaron in cylindrical quantum wires tends to shift toward the weaker electron-phonon coupling with the increasing of cutoff wave vector. Detailed numerical results confirm that the self-trapping transition is expected to occur in the cylindrical quantum wire systems of alkali halides and wide-band-gap semiconductors.

引用

页数：9

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