Zero-phonon emission and magnetic polaron parameters in EuTe

Autor(es)

Henriques, A. B. ^[1] ; Galgano, G. D. ^[1] ; Abramof, E. ^[2] ; Diaz, B. ^[2] ; Rappl, P. H. O. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[2] LAS INPE, BR-12227010 Sao Jose Dos Campos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Physics Letters; v. 99, n. 9 AUG 29 2011.
• Citações Web of Science: 7
• Assunto(s): Semicondutores

Resumo

A phonon structure in the photoluminescence of EuTe was discovered, with a well-defined zero-phonon emission line (ZPL). The ZPL redshifts linearly with the intensity of applied magnetic field, indicating spin relaxation of the photoexcited electron, and saturates at a lower magnetic field than the optical absorption bandgap, which is attributed to formation of magnetic polarons. From the difference in these saturation fields, the zero-field polaron binding energy and radius are estimated to be 43 meV and 3.2 (in units of the EuTe lattice parameter), respectively. (C) 2011 American Institute of Physics. {[}doi:10.1063/1.3634030] (AU)

• Processo FAPESP: 08/09753-3 - Detecção e controle óptico do magnetismo em semicondutores magnéticos e quantum dots
• Beneficiário: Andre Bohomoletz Henriques
• Modalidade de apoio: Auxílio à Pesquisa - Regular