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浏览/检索结果: 共2条，第1-2条 帮助 限定条件 内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Growth and temperature-depending raman characterization of different nitrogen-doped 4H-SiC crystals 会议论文 11th European Conference on Silicon Carbide and Related Materials, ECSCRM 2016, 25 September 2016 through 29 September 2016 作者:  Yang, X.L.;  Chen, X.F.;  Peng, Y.;  Xie, X.J.;  Hu, X.B. 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/31 Electrical properties  N-doped SiC  Phonon lifetime  Raman spectra   Raman spectra and phonon modes of MgxZn1-xO alloy films (EI CONFERENCE) 会议论文 12th International Conference on II-VI Compounds, September 12, 2005 - September 16, 2005, Warsaw, Poland Wei Z. P.; Lu Y. M.; Shen D. Z.; Zhang Z. Z.; Wu C. X.; Zhang J. Y.; Yao B.; Fan X. W. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 Hexagonal MgxZn1-xO alloy layers with 0 &le 0.3 have been grown by plasma-assisted molecular beam epitaxy on sapphire (006) and Si (111) substrates. Their crystal structures are characterized by x-ray diffraction spectroscopy. The nonresonant and resonant Raman spectra were measured using 488 nm line from Ar+ laser  and 325 nm line from He-Cd laser by backscattering geometry. Four Raman modes (E2 high  LO  TO  multiphonon processes) were observed in the nonresonant Raman spectra of hexagonal MgxZn1-xO with different Mg contents. The optical phonon frequencies were found to display one-mode behaviour for all the samples since no separate ZnO- and MgO-like modes were observed. The long-wavelength frequencies of ZnO-like optical phonons measured in the resonant Raman spectra can be expressed as linear functions of x. These behaviours can be explained within a modified random-element-isodisplacement model (MREI). 2006 WILEY-VCH Verlag GmbH Co. KGaA.