Temperature evolution of the 2.1eV band in the Zn_1−xMn_xSe system for low concentration

详细信息    查看全文

• 作者：Xue ; J. ; Ye ; Y. ; Medina ; F. ; Martinez ; L. ; Lopez-Rivera ; S.A. ; Giriat ; W.
• 关键词：Dilute magnetic semiconductors ; Optical properties ; Photoluminescence
• 刊名：Journal of Luminescence
• 出版年：1998
• 出版时间：April 27, 1998
• 年：1998
• 卷：78
• 期：3
• 页码：173-178
• 全文大小：139 K

文摘

The ⁴T₁(G)→⁶A₁(S) internal Mn²⁺ transition in the Zn_1−xMn_xSe single-crystal system is studied in the temperature range between 26 and 300 K, for six samples prepared by chemical transport with Mn concentrations between 0.0008x0.038. The energy position of this band has an anomalous behavior for temperatures below 150 K which can be understood in terms of antiferromagnetic d–d interactions of the Mn²⁺ ion. This behavior is observed for the first time for samples with concentrations below x=0.5. The observed broadening of this band as a function of temperature indicates the existence of strong electron–phonon coupling.