Influences of temperature and polaron effect on the ground state of quasi-two-dimensional strong-coupling exciton | Zendy

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Influences of temperature and polaron effect on the ground state of quasi-two-dimensional strong-coupling exciton

Author(s) -

Eerdunchaolu

Publication year - 2008

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.57.416

Subject(s) - polaron , exciton , phonon , ground state , condensed matter physics , physics , coupling (piping) , quantum well , materials science , atomic physics , quantum mechanics , electron , metallurgy , laser

The influences of temperature and polaron effect on the ground state of the systemfor which the exciton is strongly coupled with interface-optical (IO) phonons but weakly coupled with bulk-longitudinal-optical (LO) phonons in a quantum well, are studied by using the Huybrechts' linear-combination operator and Lee-Low-Pines (LLP) transformation method. The expressions for the induced potential and energy shift of the ground state of the exciton were derived. Numerical calculations for AgCl/AgBr QW, as an example, are performed. The result indicates that the induced potential and the energy shift increases for strong exciton-IO-phonon coupling but decreases for weak exciton-LO-phonon coupling with temperature.

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