Polaron Effects on D- Center in a Parabolic Quantum Well

YUAN Li-hua; AN Zhang-hui; MA Jun; CHEN Yu-hong

doi:null

您当前的位置：

首页 >

文章列表页 >

Polaron Effects on D^- Center in a Parabolic Quantum Well

更新时间：2020-08-11

- Polaron Effects on D^- Center in a Parabolic Quantum Well
- Chinese Journal of Luminescence Vol. 28, Issue 3, Pages: 317-320(2007)
- 作者机构：
  
  1. 兰州理工大学, 理学院,甘肃兰州,730050
  2. 中国地震局, 兰州地震研究所, 甘肃, 兰州, 730000
- 作者简介：
- 基金信息：
- DOI：
  CLC： O472.3;O469
- Received：23 August 2006，
  
  Revised：28 September 2006，
  
  Published：20 May 2007
- 稿件说明：
移动端阅览
元丽华, 安张辉, 马军, 陈玉红. 抛物阱中极化子效应对D-心的影响[J]. 发光学报, 2007,28(3): 317-320

YUAN Li-hua, AN Zhang-hui, MA Jun, CHEN Yu-hong. Polaron Effects on D- Center in a Parabolic Quantum Well[J]. Chinese Journal of Luminescence, 2007,28(3): 317-320
元丽华, 安张辉, 马军, 陈玉红. 抛物阱中极化子效应对D-心的影响[J]. 发光学报, 2007,28(3): 317-320 DOI：

YUAN Li-hua, AN Zhang-hui, MA Jun, CHEN Yu-hong. Polaron Effects on D- Center in a Parabolic Quantum Well[J]. Chinese Journal of Luminescence, 2007,28(3): 317-320 DOI：

摘要

采用改进的LLP方法在考虑体声子影响的情况下研究了抛物量子阱中电子-LO声子相互作用对D

心能量的影响.研究结果表明

阱宽较小时

心的基态能量和结合能随着阱宽

的增大而急剧减小;阱宽较大时

能量的减小比较缓慢

最后接近体材料中的三维值.并且得出了电子-LO声子相互作用可使D

心的结合能有显著的提高.

Abstract

A negative-donor center (D

) in a semiconductor heterostructure or quantum well is formed by a neutral center (D

) trapping an extra electron. This system has attracted considerable attention since the early days of quantum mechanics. D

centers are one of the simplest many-body electronic systems which can be used as a test for theoretical descriptions of e-e correlation. In previous experimental and theoretical studies

the dependence of the binding energy of D

on the magnetic-field strength and on the dimension of the quantum well have been investigated. Although there have been great efforts toward understanding the behavior of the D

centers in Q2D systems

very little information is available concerning polaron effects on the properties of the D

center in a parabolic quantum well(PQW). The polarization potential and the binding energy of the D

center in a parabolic quantum well are inves-tigated. The study has taken the effect of bulk longitudinal optical (LO) phonons into account. In order to simplify the calculation

we use the simple trial function for both electrons. By using the method of modified Lee-Low-Pines(LLP) variational method

the polarization potential and the ground state energy of D

center in the GaAs/Al

1-x

As PQW are obtained. The contribution of the impurity and LO phonon interaction to the total electron energy can be eliminated by the first canonical transformation

and the effect of this displacement on the lattice polarization leads to the polarization potential which partially compensates the electron-impurity Coulomb interaction. By the second canonical transformation

the ground state energy of the D

center in the infinite parabolic quantum well is worked out

and then the binding energy of D

center can be gained by further calculations. The research results indicate that

the ground state energy and binding energy of the D

center decreases rapidly with increasing

at the beginning

then decreases very slowly with increasing

and finally closes to the three-dimensional value in GaAs. Polaron effects on the properties of the D

center in a PQW were found to be important. Because the binding energy of the D

center is much smaller than that of a shallow donor

the relative contribution of the polaron correction is larger.

关键词

Keywords

references

Riva C,Schweigert V A,Peeters F M.Off-center D- centers in a quantum well in the presence of a perpendicular magnetic[J].Phys.Rev.B,1998,57(24):15392-15399.

Shi J M,Peeters F M,Devreese J T.D- states in GaAs/AlxGa1-xAs superlattices in a magnetic field[J].Phys.Rev.B,1995,51(12):7714-7724.

Phelps D E,Bajaj K K.Ground state energy of a D- ion in two-dimensional semiconductors[J].Phys.Rev.B,1983,27(8):4883-4886.

Larsen D M.Giant binding of D- centers in polar crystals[J].Phys.Rev.B,1981,23(2):628-632.

Huant S,Najda S P.Two-dimensions D- centers[J].Phys.Rev.Lett.,1990,65(12):1486-1488.

Pang T,Louie S G.Negative-donor centers in semiconductors and quantum well[J].Phys.Rev.Lett.,1990,65(13):1635-1640.

German A,Luna-Acosta.Hydrogenic impurities in superlattices with parabolic quantum well potential[J].Solid State Commun.,1985,55(1):5-8.

Niculescu E C.Binding energy of a double donor in a parabolic quantum well[J].Phys.Lett.A,1995,197(4):330-334.

Niculescu E C.Donor impurity in a finite parabolic quantum well[J].Phys.Lett.A,1996,213(2):85-88.

Blinowski J,Szwacka T.Variational studies of D0 and D- centers in magnetic fields in bulk crystals and in parabolic quantum wells[J].Phys.Rev.B,1994,49(15):10231-10241.

Yuan Lihua,Wang Xu,An Zhanghui,et al.Polarization potential and the binding energy of a bound polaron in parabolic quantum well[J].Chin.J.Lumin.(发光学报),2005,26(6):709-713 (in Chinese).

Melnikov D V,Beall Fowier W.Bound polaron in a spherical quantum dot:Strong electron-phonon coupling case[J].Phys.Rev.B,2001,63(16):165302-1-8.

Platzman P M.Groun state energy of bound polarons[J].Phys.Rev.,1962,125(6):1961-1965.

Lee T D,Low F E,Pines D.The motion of slow electrons in a polar crystal[J].Phys.Rev.,1953,90(1):297-302.

Views

168

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Polaron Energy Level in Wurtzite Mg_xZn_1-xO/Mg_0.3Zn_0.7O Parabolic Quantum Well

Polaron Effects of Exciton in ZnSe/ZnS Parabolic Quantum Wells

Influence of Magnetic Field on The Properties of Weak-coupling Polaron in Graphene

Thickness Effect on Quantum Transition of The Polaron in An Asymmetric Gaussian Potential Quantum Dot Within An Electric Field

Electromagnetic Field Dependence of Quantum Dot Qubit with The Thickness of Quantum Dot

Related Author

ZHANG Guo-qing

ZHAO Feng-qi

ZHANG Chen-hong

YUAN Li-hua

AN Zhang-hui

ZHANG Cai-rong

CHEN Yu-hong

WANG Dao-bin

Related Institution

College of Physics and Electronic Information, Inner Mongolia Normal University

Lanzhou Institute of Seismology, CEA

School of Science, Lanzhou University of Technology

College of Physics and Electronic Information, Inner Mongolia University for Nationalites

河北科技师范学院凝聚态物理研究所

AI问答

Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China Postal code：130033
Tel：0431-86176862 Email：fgxbt@126.com
Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰