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On participation of medium oscillations in wannier exciton motion
Author(s) -
Myasnikov E. N.,
Druzhinin A. E.,
Popov A. P.
Publication year - 1986
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221340224
Subject(s) - exciton , physics , electron , motion (physics) , phonon , polarizability , biexciton , condensed matter physics , polarization (electrochemistry) , coupling constant , atomic physics , quantum mechanics , classical mechanics , chemistry , molecule
The effect of quantum polarizable‐medium motion on relative and translational motion of the Wannier nonlocalized exciton (NLE) is investigated. It is shown that the polarization admixed to the internal motion of electron‐hole pair does (since each of the two particles is involved in both types of motion) participate in the external exciton motion which may bear the quantum character. It is pointed out that in the vicinity of k = m 1 / m 2 ≪ 1, where m 1(2) is the effective electron (hole) mass, the polarizing NLE for α h 3⪅ (α h being the coupling constant between the hole and LO‐phonons) is energetically more favourable than the self‐trapped exciton (STE).