Localized self-trapping in two-dimensional molecular lattice with interaction between Wannier–Mott excitons and phonon lattice

doi:10.1088/1674-1056/19/9/096301

中国物理B ›› 2010, Vol. 19 ›› Issue (9): 96301-096301.doi: 10.1088/1674-1056/19/9/096301

Localized self-trapping in two-dimensional molecular lattice with interaction between Wannier–Mott excitons and phonon lattice

田强¹, 徐权²

(1)Department of Physics, Beijing Normal University, Beijing 100875, China; (2)Department of Physics, Daqing Normal University, Daqing 163712, China; Department of Physics, Beijing Normal University, Beijing 100875, China

收稿日期:2009-10-03 修回日期:2010-02-09 出版日期:2010-09-15 发布日期:2010-09-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 1057400), and the Natural Science Foundation of Heilongjiang Province, China (Grant No. A200506).

Localized self-trapping in two-dimensional molecular lattice with interaction between Wannier–Mott excitons and phonon lattice

Xu Quan(徐权)^a)b)^† and Tian Qiang(田强)^b)

^a Department of Physics, Daqing Normal University, Daqing 163712, China; ^b Department of Physics, Beijing Normal University, Beijing 100875, China

Received:2009-10-03 Revised:2010-02-09 Online:2010-09-15 Published:2010-09-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 1057400), and the Natural Science Foundation of Heilongjiang Province, China (Grant No. A200506).

摘要/Abstract

摘要： We investigate the interactions of lattice phonons with Wannier--Mott exciton, the exciton that has a large radius in two-dimensional molecular lattice, by the method of continuum limit approximation, and obtain that the self-trapping can also appear in two-dimensional molecular lattice with a harmonic and nonlinear potential. The exciton effect on molecular lattice does not distort the molecular lattice but only makes it localized and the localization can also react, again through phonon coupling, to trap the energy and prevents its dispersion.

Abstract: We investigate the interactions of lattice phonons with Wannier–Mott exciton, the exciton that has a large radius in two-dimensional molecular lattice, by the method of continuum limit approximation, and obtain that the self-trapping can also appear in two-dimensional molecular lattice with a harmonic and nonlinear potential. The exciton effect on molecular lattice does not distort the molecular lattice but only makes it localized and the localization can also react, again through phonon coupling, to trap the energy and prevents its dispersion.

Key words: self-trapping, Wannier–Mott exciton, two-dimensional molecular lattice, phonon

中图分类号:

6320R

徐权, 田强. Localized self-trapping in two-dimensional molecular lattice with interaction between Wannier–Mott excitons and phonon lattice[J]. 中国物理B, 2010, 19(9): 96301-096301.

Xu Quan(徐权) and Tian Qiang(田强). Localized self-trapping in two-dimensional molecular lattice with interaction between Wannier–Mott excitons and phonon lattice[J]. Chin. Phys. B, 2010, 19(9): 96301-096301.

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Localized self-trapping in two-dimensional molecular lattice with interaction between Wannier–Mott excitons and phonon lattice

Localized self-trapping in two-dimensional molecular lattice with interaction between Wannier–Mott excitons and phonon lattice

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