Temperature dependence of Mg-H local vibrational modes in heavily doped InN:Mg

被引：6

作者：

Cusco, Ramon ^{[1
]}

Domenech-Amador, Nuria ^{[1
]}

Artus, Luis ^{[1
]}

Wang, Ke ^{[2
]}

Yamaguchi, Tomohiro ^{[2
]}

Nanishi, Yasushi ^{[2
]}

机构：

[1] Consell Super Invest Cient CSIC, Inst Jaume Almera, Barcelona 08028, Spain

[2] Ritsumeikan Univ, Fac Sci & Engn, Kusatsu, Shiga 5258577, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 05期

关键词：

MOLECULAR-BEAM EPITAXY; RAMAN-SCATTERING; GAN; COMPLEXES; HYDROGEN; GAAS; PRESSURE;

D O I：

10.1063/1.4749266

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the temperature dependence and anharmonic coupling of the local vibrational modes (LVMs) associated with Mg-H complexes in heavily doped InN:Mg. Two main LVM peaks are observed which are probably related to two different H-impurity bond lengths. The temperature dependence of the higher-frequency mode, which exhibits a monotonic frequency downshift and broadening with increasing temperature, can be explained by LVM dephasing due to acoustic phonon scattering. The lower-frequency mode displays an anomalous behavior as its frequency decreases initially and then starts to increase linearly above room temperature. The anharmonic coupling of the lower-frequency mode to a molecular mode of the impurity complex is suggested as a possible cause for this behavior. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749266]

引用

页数：6

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