Liu, CS , Yanshan Univ, Dept Phys, Qinhuangdao 066004, Peoples R China
部门归属:
[Liu, CS] Yanshan Univ, Dept Phys, Qinhuangdao 066004, Peoples R China; [Liu, CS; Wu, WC] Natl Taiwan Normal Univ, Dept Phys, Taipei 11650, Taiwan; [Luo, HG] Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China; [Luo, HG] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China; [Luo, HG] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要:
Motivated by a recent experiment of spatial and temperature-dependent average exciton energy distribution in coupled quantum wells [S. Yang et al., Phys. Rev. B 75, 033311 (2007)], we investigate the nature of the interactions in indirect excitons. Based on the uncertainty principle, along with a temperature and energy-dependent distribution which includes both population and recombination effects, we show that the interplay between an attractive two-body interaction and a repulsive three-body interaction can lead to a natural and good account for the nonmonotonic temperature dependence of the average exciton energy. Moreover, exciton energy maxima are shown to locate at the brightest regions, in agreement with the recent experiments. Our results provide an alternative way for understanding the underlying physics of the exciton dynamics in coupled quantum wells.
Liu, C. S.,Luo, H. G.,Wu, W. C.. Theoretical modeling of spatial- and temperature-dependent exciton energy in coupled quantum wells[J]. PHYSICAL REVIEW B,2009,80(12):-.
