Temperature Effects of Strong Coupling Polaron in Quantum Wire

DING Zhao-hua; XU Jie; ZHAO Cui-lan; XIAO Jing-lin

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Temperature Effects of Strong Coupling Polaron in Quantum Wire

更新时间：2020-08-12

- Temperature Effects of Strong Coupling Polaron in Quantum Wire
- Chinese Journal of Luminescence Vol. 29, Issue 2, Pages: 238-242(2008)
- 作者机构：
  
  1. 内蒙古民族大学, 物理与电子信息学院,内蒙古通辽,028043
  2. 辽东学院, 信息系,辽宁丹东,118003
- 作者简介：
- 基金信息：
- DOI：
  CLC： O472.3;O469
- Received：12 July 2007，
  
  Revised：04 November 2007，
  
  Published：20 March 2008
- 稿件说明：
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丁朝华, 许杰, 赵翠兰, 肖景林. 量子线中强耦合极化子的温度效应[J]. 发光学报, 2008,29(2): 238-242

DING Zhao-hua, XU Jie, ZHAO Cui-lan, XIAO Jing-lin. Temperature Effects of Strong Coupling Polaron in Quantum Wire[J]. Chinese Journal of Luminescence, 2008,29(2): 238-242
丁朝华, 许杰, 赵翠兰, 肖景林. 量子线中强耦合极化子的温度效应[J]. 发光学报, 2008,29(2): 238-242 DOI：

DING Zhao-hua, XU Jie, ZHAO Cui-lan, XIAO Jing-lin. Temperature Effects of Strong Coupling Polaron in Quantum Wire[J]. Chinese Journal of Luminescence, 2008,29(2): 238-242 DOI：

摘要

采用Tokuda改进的线性组合算符法和有效质量下的变分法

研究在抛物势作用下

同时考虑电子与LO声子相互作用时

温度对量子线中强耦合极化子特性的影响。对RbCl晶体所作的数值计算结果表明

量子线中强耦合极化子的基态能量、平均数和光学声子平均数均随温度的升高而增加。

Abstract

Recently

many theoretical and experimental studies of the electromagnetic and optical properties of low-dimensional semiconducting quantum structures have been carried out because of the intrinsic physical interest of these structures as their wide ranging

possible applications in the future. Quantum wires

in particular

play an important role in microelectronic and optoelectronic devices. Since a quantum wire is a one-dimensional structure with the electron motion confined in two-directions

quantum effects are more apparent than that in a two-dimensional quantum structure. In addition

the physical properties of quantum wires may be controlled by applied external electric and magnetic fields. External fields are therefore of great importance in studies on the properties of quantum wires.Following the recent proposal by Sakaki of a quantum wire that can be produced using modern growth techniques

a great deal of theoretical and experimental effort has been directed toward these structures. Li

et al

. studied the effects of the parabolic potential and confined phonons on a free polaron in a parabolic quantum wire. Yeung

et al

. investigated the cyclotron resonance of a strong parabolic potential and weak electron-LO-phonon coupling. Chuu

et al

. have investigated the energies of the ground state and the excited state in cylindrical quantum wires using Pekar alternative approach and perturbation-variational approach. Krishna

et al

. studied the effects of electron-phonon interaction on the ground and excited state energies of an electron in a polar quantum strip by using a variational method. The properties of polaron and megnetopolaron in cylindrical quantum wires

rectangular quantum wires and parabolic quantum wires have been studied by the method of linear-combination operator and unitary transformation by one of the present authors and co-worker.In this paper

we studied some properties of strong-coupling polarons in a parabolic quantum wires under a finite temperature. The system ground state energy and the mean number of optical phonon are derived by using improved linear combination operators and the variational method. Numerical calculations

for the RbCl crystal as an example

are performed. The results indicate that the mean number and the ground state energy of polaron

the mean number of phonons of the strong-coupling polaron in a quantum wire increase with the increase of the temperature.

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Keywords

references

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Ding Zhaohua,Zhao Cuilan,Xiao Jinglin.Temperature effects of strong coupling polaron in quantum wire[J].J.At.Mol.Phys.(原子与分子物理学报),2007,24(3):629-633 (in Chinese).

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Ding Zhaohua,Zhao Cuilan,Xiao Jinglin.Temperature dependences of polaron in a parabolic quantum wire[J].Chin.J.Semicond.(半导体学报),2006,27(z1):54-57 (in Chinese).

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河北科技师范学院凝聚态物理研究所

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