Phonon confinement effect on the polaron states in a double quantum ring structure in the presence of electric and magnetic fields

被引：3

作者：

Yeranosyan, Mkrtich A. ^{[1
,2
]}

Vartanian, Arshak L. ^{[1
]}

Shahbandari, Abbas ^{[3
]}

Kirakosyan, Albert A. ^{[1
]}

机构：

[1] Yerevan State Univ, Fac Phys, Dept Solid State Phys, Yerevan 0025, Armenia

[2] State Engn Univ Armenia, Dept Microelect & Biomed Devices, Yerevan 0009, Armenia

[3] Farhangiyan Univ, Tehran 1939614464, Iran

来源：

PHYSICA B-CONDENSED MATTER | 2015年 / 456卷

关键词：

Double quantum ring; Confined and interface optical phonons; Electric and magnetic fields; IMPURITY BOUND POLARON; DOUBLE HETEROSTRUCTURES; BINDING-ENERGY; 2-DIMENSIONAL ELECTRONS; HYDROGENIC IMPURITY; INTERFACE PHONONS; LO PHONONS; WELLS; SCATTERING; MODES;

D O I：

10.1016/j.physb.2014.09.024

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In the framework of effective mass approximation the polaron problem in double quantum ring structures in the presence of perpendicular electric and magnetic fields with taken into account the effect of phonon confinement is considered. We derived general expressions for the normalized eigenfunctions of the confined optical and interface optical phonon modes and the dispersion relation for interface optical phonons as well as electron-confined optical phonon and electron interlace optical phonon Frohlich interaction Hamiltonians in the double quantum ring system. Results reveal that the electron-optical phonon coupling leads to the decrease of the electron ground state energy. We have shown that the polaron energy exhibits a pronounced local maximum (rninimuum) in dependence on an electric (magnetic) field which corresponds to the sharp decrease (increase) of the polaronic contributions due to confined optical and interface optical phonon modes. (C) 2014 Elsevier By. All rights reserved,

引用

页码：365 / 370

页数：6

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