Fig. 1.
Ground state energy $\varepsilon_{\rm g}$ as a function of the electric field strength $F$ for (a) $\alpha=$ 6.5,$l_1=$ 0.25,$\omega_{\rm c}=$ 0.5 and (b) $\alpha=$ 6.5,$l_1=$ 0.25,$\omega_{\rm c}=$ 10.0.
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M. Tiotsop, A. J. Fotue, S. C. Kenfack, N. Issofa, A. V. Wirngo, M. P. Tabue Djemmo, H. Fotsin, L. C. Fai. Electro-magnetic weak coupling optical polaron and temperature effect in quantum dot[J]. Journal of Semiconductors, 2015, 36(10): 102001. doi: 10.1088/1674-4926/36/10/102001
M. Tiotsop, A. J. Fotue, S. C. Kenfack, N. Issofa, A. V. Wirngo, M. P. T. Djemmo, H. Fotsin, L. C. Fai. Electro-magnetic weak coupling optical polaron and temperature effect in quantum dot[J]. J. Semicond., 2015, 36(10): 102001. doi: 10.1088/1674-4926/36/10/102001.
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Electro-magnetic weak coupling optical polaron and temperature effect in quantum dot
doi: 10.1088/1674-4926/36/10/102001
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Abstract
We investigate the influence of the electric field and magnetic fields on the ground state energy of a polaron in a spherical semiconductor quantum dot (QD) using the modified Lee Low Pines (LLP) method.The numerical results show the increase of the ground state energy with the increase of the electric field and the electron-phonon coupling constant, and the decrease with the magnetic field and the longitudinal confinement length.It is also seen that the temperature is an increasing function of the cyclotron frequency and the coupling constant whereas it decreases with the electric field strength.The modulation of the electric field, the magnetic field and the confinement length leads to the control of decoherence in the system.-
Keywords:
- electric field,
- magnetic field,
- modified LLP,
- polaron energy,
- quantum dot,
- temperature
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References
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