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
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): 238-242DOI:
Temperature Effects of Strong Coupling Polaron in Quantum Wire
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.
关键词
量子线极化子基态能量光学声子平均数温度效应
Keywords
quantum wirepolarontemperature effectmean number of optical phononground state energy
references
Yeung T C,Hong L H,Gu S W,et al.Impurity magnetopolaron effects in parabolic quantum wires[J].Phys.Lett.A,1994,192(1):91-93.
Degani M H,Hipolito O.Interaction of optical phonons with electrons in GaAs quantum wires[J].Solid State Commun.,1988,65(10):1185-1187.
Chen Q H,Wang Z B,Wu F L,et al.Variational path-integral study on bound polaron in parabolic dot and wires[J].Chin.Phys.Lett.,2001,18(5):668-671.
Degani M H,Hipolito O.Exciton binding energy in quantum-well wires[J].Phys.Rev.B,1987,35(17):9345-9349.
Bouhassoune M,Charrow R,Fliyou M,et al.Binding of a bound polaron in a quantum well wires[J].Acta Phys.Pola(Poland),2000,98(1-2):111-122.
Chen Q H,Wang K L.Feyman-Haken path integral study on bound polaron in parabolic quantum wire[J].Chin.Phys.Lett.,2001,18(5):668-673.
Xie H J.Polaron self energy and effective mass in a free-standing cylindrical quantum wire[J].Phys.E,2004,22(3):906-393.
Zhang L,Xie H J.Transfer matrix method for the Frohlich electron-interface optical phonon interaction in multilayer coaxial quantum well wires[J].Int.J.Mod.Phys.B,2004,18(3):379-393.
Gou B P,Kong X J.Electron energy levels for a finite rectangular quantum wire in a transverse magnetic field[J].J.Appl.Phys.,2005,98(5):053710-1-5.
Zhou H Y,Gu S W.Energy levels of strong coupling magnetopolaron in quantum wire[J].J.Shanghai Jiaotong Univ.(Sci.),2002,E-7(1):100-104 (in English).
Ding Zhaohua,Zhao Cuilan,Xiao Jinglin.Excited state of polaron in parabolic quantum wires[J].Chin.J.Lumin.(发光学报),2007,28(2):149-154 (in Chinese).
Ding Zhaohua,Zhao Cuilan,Xiao Jinglin.Effective mass of strong-coupling magnetopolaron in a parabolic quantum wire[J].J.Optoelectronics·Laser (光电子·激光),2005,16(2):240-243 (in Chinese)
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).
Su Yala,Xiao Jinglin.Properties of the bound magnetopolaron in a parabolic quantum wire[J].Chin.J.Lumin.(发光学报),2006,27(3):296-302 (in Chinese).
Wang Xiuqing,Xiao Jinglin.The effective mass of the bound palaron in a polar slab[J].Chin.J.Lumin.(发光学报),2007,28(6):827-831 (in Chinese).
Ding Zhaohua,Zhao Cuilan,Xiao Jinglin.Effective mass of strong-coupling polaron in a parabolic quantum wire[J].Chin.J.Lumin.(发光学报),2005,26(1):32-36 (in Chinese).
Ding Zhaohua,Zhao Cuilan,Xiao Jinglin.Effective mass and mean number of optical phonon of weak-coupling polaron in a parabolic quantum wires[J].Chin.J.Lumin.(发光学报),2005,26(6):704-708 (in Chinese).
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).
Ding Zhaohua,Wang Liguo,Xiao Jinglin.Properties of polaron in rectangular quantum wires[J].J.Optoelectronics·Laser (光电子·激光),2003,14(10):1103-1105 (in Chinese).
Ding Zhaohua,Xiao Jinglin.The electron-phonon interaction energy of polaron in a cylindrical quantum wire[J].Chin.J.Lumin.(发光学报),2003,24(5):501-504 (in Chinese).