EXCITED STATES OF 3d-ELECTRON AND LATTICE RELAXATION IN SEMIMAGNETIC-SEMICONDUCTORS

半磁半导体中 3d 电子的激发态和晶格弛豫

• 批准号: 06452037
• 负责人: NAKAHARA Junichiro
• 金额: $ 4.61万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452037/
• 关键词: Semimagnetic Semiconductor; d-states; Excited States; Lattice Relaxation; Relaxd Process; Localized States; 格子緩和; 局在・非局在; 発光

The energy shift of the Mn^<2+> photoluminescence peak according to excitation energy is observed at low temperatures. Using this shift we estimate inhomogeneou and homogeneous broadening of Mn^<2+> photoluminescence separately. In creasing temperatures inhomogeneous broadening changes its character to homogeneous one. Time profiles of infrared photoluminescence are investigated and their built up processes are explained using energy transfer from the extended states to localized states. High density effects of excited d-multiplet states of Mn^<2+> are investigated at 2K and nonexponential decay are observed at high density excitation. At the initial part of the decay profiles extra decay with short life time appear and its intensity increases. This effect is considered as the precursor effect of super flourescence or super radiance.

在低温下观察到Mn 2+ 光致发光峰根据激发能的能量移动。利用这种转变，我们分别估计了 Mn^<2+> 光致发光的不均匀和均匀展宽。随着温度的升高，不均匀展宽将其特性转变为均匀展宽。研究了红外光致发光的时间分布，并利用从扩展态到局域态的能量转移来解释其形成过程。在2K下研究了Mn^2+的激发d-多重态的高密度效应，并在高密度激发下观察到非指数衰减。在衰变曲线的初始部分，出现了寿命较短的额外衰变，并且其强度增加。这种效应被认为是超荧光或超辐射的前兆效应。

项目成果

K.Takmura, D.J.Park, J.Gregus, J.Nakahara: "Decay Process of Excited 3D Multiplet States with Large Lattice Relaxation" J.Cry.Res.Tech. (in press). (1996)

K.Takmura、D.J.Park、J.Gregus、J.Nakahara：“具有大晶格弛豫的激发 3D 多重态的衰变过程”J.Cry.Res.Tech。

J.Gregus, J.Nakahara, K.Takamura, J.Watanabe, K.Ando, H.Akinaga: "PHOTOLUMINESCENCE IN CdMnTe STRAINED FILMS" J.Phys.Chem.Solids. 58. 407-410 (1995)

J.Gregus、J.Nakahara、K.Takamura、J.Watanabe、K.Ando、H.Akinaga：“CdMnTe 应变薄膜中的光致发光”J.Phys.Chem.Solids。

H.Kojima, H.Kayama, T.Kobayashi, K.Uchida, J.Nakahara: "Comparative Study of Photoluminescence in Ordered and Disordered GaInP Alloys under High Pressure" J.Phys.Chem.Solids. 56. 345-348 (1995)

H.Kojima、H.Kayama、T.Kobayashi、K.Uchida、J.Nakahara：“高压下有序和无序 GaInP 合金光致发光的比较研究”J.Phys.Chem.Solids。

H.Kojima,H.Kayama,T.Kobayashi,K.Uchida,J.Nakahara: "Comparative Study of Photoluminescence in Ordered and Disordered GaInP Alloys under High Pressure" J.Phys.Chem.Solids. (1995)

H.Kojima、H.Kayama、T.Kobayashi、K.Uchida、J.Nakahara：“高压下有序和无序 GaInP 合金光致发光的比较研究”J.Phys.Chem.Solids。

K.Takmura,D.J.Park,J.Gregus J.Nakahara: "Decay Process of Excited 3D Multiplet States with Large Lattice Relaxation" J.Cry.Res.Tech.(印刷中). (1996)

K.Takmura、D.J.Park、J.Gregus J.Nakahara：“具有大晶格弛豫的激发 3D 多重态的衰变过程”J.Cry.Res.Tech.（出版中）。