Effective Landé factor in a GaMnAs quantum dot; with the effects of sp-d exchange on a bound polaron

The first-excited-state (ES) binding energy of hydrogenic impurity bound polaron in an anisotropic quantum dot (QD) is obtained by constructing a variational wavefunction under the action of a uniform external electric field. As for a comparison, the ground-state (GS) binding energy of the system is also included. We apply numerical calculations to KBr QD with stronger electron–phonon (E–P) interaction in which the new variational wavefunction is adopted. We analyzed specifically the effects of electric field and the effects of both the position of the impurity and confinement lengths in the xy-plane and the [Formula: see text] direction on the ground and the first-ES binding energies (BEs). The results show that the selected trial wavefunction in the ES is appropriate and effective for the current research system.

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The Rashba Effect on the Bound Polaron in a Parabolic Quantum Dot

Journal of Low Temperature Physics ◽

10.1007/s10909-010-0281-5 ◽

2010 ◽

Vol 163 (1-2) ◽

pp. 53-59 ◽

Cited By ~ 14

Author(s):

Ji-Wen Yin ◽

Wei-Ping Li ◽

Yi-Fu Yu ◽

Jing-Lin Xiao

Keyword(s):

Quantum Dot ◽

Rashba Effect ◽

Bound Polaron ◽

Parabolic Quantum Dot

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TEMPERATURE-DEPENDENCE OF STRONG-COUPLED BOUND POLARON IN A TRIANGULAR POTENTIAL QUANTUM DOT

Modern Physics Letters B ◽

10.1142/s0217984911500151 ◽

2012 ◽

Vol 26 (03) ◽

pp. 1150015 ◽

Cited By ~ 6

Author(s):

ZHI-XIN LI

Keyword(s):

High Temperature ◽

Quantum Dot ◽

Ground State Energy ◽

Ground State ◽

State Energy ◽

Polar Angle ◽

Strongly Coupled ◽

Influence Of Temperature ◽

Leading Role ◽

Bound Polaron

We study the temperature effect of bound polaron, which is strongly coupled to LO-phonon by using a variational method of the Pekar type in a triangular potential quantum dot (QD). The ground state energy was expressed as functions of the confinement length of QD, the Coulomb bound potential, the polar angle and the temperature. It is found that at low temperature, the influence of Coulomb bound potential and the confinement length of QD to the ground state energy of bound polaron play a leading role. At high temperature, the influence of temperature to the ground state energy of bound polaron is dominant.

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EFFECTIVE MASS OF STRONG-COUPLED BOUND POLARON IN AN ASYMMETRIC QUANTUM DOT INDUCED WITH RASHBA EFFECT

International Journal of Nanoscience ◽

10.1142/s0219581x11008265 ◽

2011 ◽

Vol 10 (03) ◽

pp. 501-505 ◽

Cited By ~ 3

Author(s):

ZHIXIN LI ◽

JUAN XIAO ◽

AIYONG LIU ◽

JINGLIN XIAO

Keyword(s):

Quantum Dot ◽

Effective Mass ◽

Operator Method ◽

Transformation Method ◽

Rashba Effect ◽

Linear Combination Operator ◽

Polaron Model ◽

Bound Polaron ◽

Asymmetric Quantum Dot ◽

Asymmetric Quantum

In this paper, on the basis of Huybrechs' strong-coupled polaron model, the Tokuda-modified linear-combination operator method and the unitary transformation method are used to study the properties of the strong-coupled bound polaron considering the influence of Rashba effect, which is brought by the spin-orbit (SO) interaction, in an asymmetric quantum dot (QD). The expression for the effective mass of the polaron as functions of the transverse and longitudinal bound strengths, velocity, vibration frequency, and the bound potential has been derived. After a simple numerical calculation on the RbCl crystal, we found that the total effective mass of the bound polaron is composed of three parts. The interaction between the orbit and the spin with different directions has different effects on the effective mass of the bound polaron.

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