Mean number of phonons of strong-coupled polaron in a parabolic quantum well

Abstract

Abstract: The mean number of phonons of the strong-coupled polaron in a parabolic quantum well is studied by using the linear combination operator and the unitary transformation method. The relations among the mean number of phonons of the strong-coupled polaron in a parabolic quantum well, the confinement strength of parabolic quantum well and the electron-longitudinal optical phonons coupling constant are derived. Numerical calculation indicated that the mean number of phonons of the strong-coupled polaron will increase with increasing the confinement strength; the mean number of phonons will increase with increasing the electron-longitudinal optical phonons coupling constant. With the decrease of the confinement strength, the mean number of phonons tends to be the result of the crystalline material. The interaction of the electron and the phonons is enhanced by the increase of the the electron-longitudinal optical phonons coupling constant or the confinement strength of parabolic quantum well.

Key words: materials; the mean number of phonons; linear combination operator; unitary transformation method; strong-coupled polaron; parabolic quantum well

CLC Number:

O469

GAO Kuanyun, XING Haifeng . Mean number of phonons of strong-coupled polaron in a parabolic quantum well[J]. J4, 2016, 33(5): 635-640.

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