Study of strong-coupling impurity bound polaron in a quantum pseudodot

被引:14
作者
Khordad, R. [1 ]
机构
[1] Univ Yasuj, Coll Sci, Dept Phys, Yasuj 75914353, Iran
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2015年 / 29卷 / 09期
关键词
Quantum dot; polaron; optical properties; GROUND-STATE LIFETIME; TRANSITION; FREQUENCY;
D O I
10.1142/S0217979215500587
中图分类号
O59 [应用物理学];
学科分类号
摘要
In the present work, we have studied the first internal excited state energy and transition frequency of strong-coupling impurity bound polaron in a quantum pseudodot using the well-known Lee-Low-Pines (LLP) unitary transformation method. We show the effect of Coulomb bound potential, electron-phonon (e-p) coupling strength, the quantum dot radius and potential height on first internal excited state energy and the transition frequency of the impurity bound polaron. According to the results, it is found that the first internal excited state energy is decreased with increasing quantum dot radius. Also, this energy is increased with enhancing potential height. The transition frequency is increased with increasing the e-p coupling strength. Also, the first internal excited state energy is increased with decreasing the e-p coupling strength. The transition frequency is enhanced with increasing the Coulomb bound potential.
引用
收藏
页数:10
相关论文
共 29 条
[1]   EFFECTS OF ANISOTROPIC PARABOLIC POTENTIAL ON THE ENERGY LEVELS AND TRANSITION FREQUENCY OF STRONG-COUPLING POLARON IN A QUANTUM DOT [J].
Cai, Chun-Yu ;
Zhao, Cui-Lan ;
Xiao, Jing-Lin .
INTERNATIONAL JOURNAL OF NANOSCIENCE, 2013, 12 (03)
[2]   A quantum pseudodot system with a two-dimensional pseudoharmonic potential [J].
Cetin, A. .
PHYSICS LETTERS A, 2008, 372 (21) :3852-3856
[3]   Variational path-integral study on bound polarons in parabolic quantum dots and wires [J].
Chen, QH ;
Wang, ZB ;
Wu, FL ;
Luo, MB ;
Ruan, YH ;
Jiao, ZK .
CHINESE PHYSICS LETTERS, 2001, 18 (05) :668-671
[4]   Influence of both electric and magnetic fields on the bound polaron in an anisotropic quantum dot [J].
Chen, Shi-Hua ;
Xiao, Jing-Lin .
INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2008, 22 (16) :2611-2616
[5]   INTERNAL EXCITED-STATE OF OPTICAL POLARON [J].
HUYBRECHTS, WJ .
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1977, 10 (19) :3761-3768
[6]   Ground- and first-excited state energies of impurity magnetopolaron in an anisotropic quantum dot -: art. no. 054303 [J].
Kandemir, BS ;
Çetin, A .
PHYSICAL REVIEW B, 2002, 65 (05) :1-11
[7]   Linear and nonlinear optical absorption coefficients and refractive index changes in spherical quantum dots: Effects of impurities, electric field, size, and optical intensity [J].
Karabulut, Ibrahim ;
Baskoutas, Sotirios .
JOURNAL OF APPLIED PHYSICS, 2008, 103 (07)
[8]   A variational approach with squeezed-states for the polaronic effects in quantum dots [J].
Kervan, N ;
Altanhan, T ;
Chatterjee, A .
PHYSICS LETTERS A, 2003, 315 (3-4) :280-287
[9]   Energy levels and transition frequency of strong-coupling polaron in a Gaussian quantum dot [J].
Khordad, R. .
MODERN PHYSICS LETTERS B, 2014, 28 (19)
[10]   Application of Tietz Potential to Study Singlet-Triplet Transition of a Two-Electron Quantum Dot [J].
Khordad, R. ;
Mirhosseini, B. .
COMMUNICATIONS IN THEORETICAL PHYSICS, 2014, 62 (01) :77-80