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The Renormalization of the Energetical Spectrum and the Peculiarities of High Density Paraexciton Luminescence Band

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dc.contributor.author BOBRYSHEVA, A. I.
dc.contributor.author MOSKALENKO, S. A.
dc.contributor.author SHMIGLYUK, M. I.
dc.contributor.author RUSSU, S. S.
dc.date.accessioned 2021-10-26T08:55:35Z
dc.date.available 2021-10-26T08:55:35Z
dc.date.issued 1995
dc.identifier.citation BOBRYSHEVA, A. I., MOSKALENKO, S. A., SHMIGLYUK, M. I. et al. The Renormalization of the Energetical Spectrum and the Peculiarities of High Density Paraexciton Luminescence Band. In: Physica Status Solidi (b), 1995, V. 190, N. 2, pp. 481-486. ISSN 1521-3951. en_US
dc.identifier.uri https://doi.org/10.1002/pssb.2221900217
dc.identifier.uri http://repository.utm.md/handle/5014/17804
dc.description Access full text - https://doi.org/10.1002/pssb.2221900217 en_US
dc.description.abstract The renormalization of the energetical spectrum of paraexcitons in the presence of a Bose-Einstein condensate (BEC) of orthoexcitons or at least of their saturation is studied. Due to the conversion of a pair of orthoexcitons into a pair of paraexcitons an absolute instability in the energy spectrum of paraexcitons appears. The appeared paraexcitons can be downscattered by optical phonons T5 (88 cm−1) into a state above the bottom of the paraexciton band. This can be the reason of the observed peculiarities in the paraexciton luminescence band. On this basis a new explanation of the appearance of an extra peak in the luminescence spectrum of the uniaxially stressed Cu2O crystal is suggested. It has the same origin as the bump of the luminescence band in unstrained crystals. The spectral positions of the extra peak and of the bump differ due to the diminution of the ortho-para splitting in uniaxially stressed crystals. The difference of their widths is due to different densities of the condensed orthoexcitons in stressed and unstrained crystals. en_US
dc.language.iso en en_US
dc.publisher John Wiley & Sons, Inc. en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject paraexcitons en_US
dc.subject luminescence en_US
dc.subject crystals en_US
dc.title The Renormalization of the Energetical Spectrum and the Peculiarities of High Density Paraexciton Luminescence Band en_US
dc.type Article en_US


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