TY - JOUR
T1 - Classical-quantum crossovers in quasi-one-dimensional electron-hole systems
T2 - Exciton-Mott physics and interband optical spectra
AU - Yoshioka, Takuya
AU - Asano, Kenichi
PY - 2012/9/10
Y1 - 2012/9/10
N2 - We study quasi-one-dimensional electron-hole (e-h) systems by applying a self-consistent screened T-matrix approximation (SSTA), which can treat an e-h pair embedded in the background of the exciton-plasma mixture, characterized by the exciton ionization ratio. Two classical-quantum crossovers are found. The first crossover takes place as the drastic suppression of ionization ratio, representing the onset of the quantum dissociation of the exciton (binding-energy reduction and level-broadening effects). The second one can be seen in a gradual change in the interband absorption-gain and photoluminescence spectra: Moss-Burstein effects become significant, and the e-h plasma starts to dominate the optical gain. Most of the features of the absorption-gain spectra observed in the recent experiments can be captured semiquantitatively by our SSTA.
AB - We study quasi-one-dimensional electron-hole (e-h) systems by applying a self-consistent screened T-matrix approximation (SSTA), which can treat an e-h pair embedded in the background of the exciton-plasma mixture, characterized by the exciton ionization ratio. Two classical-quantum crossovers are found. The first crossover takes place as the drastic suppression of ionization ratio, representing the onset of the quantum dissociation of the exciton (binding-energy reduction and level-broadening effects). The second one can be seen in a gradual change in the interband absorption-gain and photoluminescence spectra: Moss-Burstein effects become significant, and the e-h plasma starts to dominate the optical gain. Most of the features of the absorption-gain spectra observed in the recent experiments can be captured semiquantitatively by our SSTA.
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U2 - 10.1103/PhysRevB.86.115314
DO - 10.1103/PhysRevB.86.115314
M3 - Article
AN - SCOPUS:84866367653
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 11
M1 - 115314
ER -