Publikationsdatum:
2018-07-17
Beschreibung:
Author(s): S. Shree, M. Semina, C. Robert, B. Han, T. Amand, A. Balocchi, M. Manca, E. Courtade, X. Marie, T. Taniguchi, K. Watanabe, M. M. Glazov, and B. Urbaszek The interaction of excitons with phonons governs energy relaxation, dephasing, and optical transition line broadening with temperature in two-dimensional (2D) materials. Here, the authors observe and study unusual high-energy tails in both absorption and emission extending over several meV in energy at low temperatures. They develop a theory of the effect and show that the coupling between acoustic phonons and excitons lies at the origin for the observed high-energy tails. This work demonstrates that the exciton-phonon coupling in 2D crystals is more efficient as compared with conventional semiconductor structures, such as GaAs/AlGaAs quantum wells. [Phys. Rev. B 98, 035302] Published Mon Jul 16, 2018
Schlagwort(e):
Semiconductors II: surfaces, interfaces, microstructures, and related topics
Print ISSN:
1098-0121
Digitale ISSN:
1095-3795
Thema:
Physik
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