Berry phase for a three-dimensional anisotropic quantum dot

2005 ◽  
Vol 335 (1) ◽  
pp. 1-10 ◽  
Author(s):  
V.A. Geyler ◽  
A.V. Shorokhov
Keyword(s):  
Quantum Dot ◽  
Berry Phase ◽  
Three Dimensional ◽  
Anisotropic Quantum Dot

Hydrogenic impurity bound polaron in an anisotropic quantum dot

2018 ◽  
Vol 32 (02) ◽  
pp. 1850006
Author(s):  
Shi-Hua Chen
Keyword(s):  
Binding Energy ◽  
Quantum Dot ◽  
Three Dimensional ◽  
Binding Energies ◽  
Total Binding Energy ◽  
Phonon Interaction ◽  
Hydrogenic Impurity ◽  
Electron Phonon Interaction ◽  
Dependent Relationship ◽  
Anisotropic Quantum Dot

The effect of the electron–phonon interaction on an electron bound to a hydrogenic impurity in a three-dimensional (3D) anisotropic quantum dot (QD) is studied theoretically. We use the Landau–Pekar variational approach to calculate the binding energy of ground state (GS) and first-excited state (ES) with considering electron–phonon interaction. The expressions of the GS and ES energies under investigation depict a rich variety of dependent relationship with the variational parameters in three different limiting cases. Numerical calculations were performed for ZnSe QDs with different confinement lengths in the xy-plane and the z-direction, respectively. It is illustrated that binding energies of impurity polarons corresponding to each level are larger in small QDs. Furthermore, the contribution to binding energy from phonon is about 15% of the total binding energy.

VIBRATIONAL FREQUENCY OF IMPURITY BOUND MAGNETOPOLARON IN AN ANISOTROPIC QUANTUM DOT

2009 ◽  
Vol 23 (20n21) ◽  
pp. 2449-2456 ◽  
Author(s):  
WEI XIAO ◽  
JING-LIN XIAO
Keyword(s):  
Quantum Dot ◽  
Interaction Energy ◽  
Coupling Strength ◽  
Vibrational Frequency ◽  
Cyclotron Frequency ◽  
Operator Method ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Anisotropic Quantum Dot ◽  
Bound Magnetopolaron

We study the vibrational frequency and the interaction energy of the weak-coupling impurity bound magnetopolaron in an anisotropic quantum dot. The effects of the transverse and longitudinal effective confinement lengths, the electron–phonon coupling strength, the cyclotron frequency of a magnetic field and the Coulomb bound potential are taken into consideration by using an improved linear combination operator method. It is found that the vibrational frequency and the interaction energy will increase rapidly with decreasing confinement lengths and increasing the cyclotron frequency. The vibrational frequency is an increasing function of the Coulomb bound potential, whereas the interaction energy is an decreasing one of the potential and the electron–phonon coupling strength.

Three-Dimensional TiO2/ZnO Hybrid Array as a Heterostructured Anode for Efficient Quantum-Dot-Sensitized Solar Cells

2015 ◽  
Vol 7 (9) ◽  
pp. 5199-5205 ◽  
Author(s):  
Hao-Lin Feng ◽  
Wu-Qiang Wu ◽  
Hua-Shang Rao ◽  
Quan Wan ◽  
Long-Bin Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Three Dimensional ◽  
Sensitized Solar Cells
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