Crystal Characterization by Far-infrared Magneto-optical Absorption

通过远红外磁光吸收表征晶体

• 批准号: 61460066
• 负责人: OHYAMA Tyuzi
• 金额: $ 4.1万
• 依托单位: Osaka 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: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61460066/
• 关键词: Twin Crystal; Polaron; Two Dimensional Electron; Cyclotron Resonance; EL2 Center; EL2中心; フォトクエンチング; 磁気光共鳴; 電子散乱; ヒ素化ガリウム; セレン化亜鉛; リン化インジウム

In this work,millimeter and submillimeter wave magneto- absorption measurements,which illuminate the way to study the band structure,carrier transport,kinetics etc.,has been used to make a direct characterization of such meterials as Ge,InSb,GaAs and AnSe. Experimental results are as follows.1)For the first time,heavy hole cyclotron resonance has been observed in ZnSe. The resonance is almost isotropic and corresponds to a polaron effective mass of m_p=1.04m_o.2)Through the X-ray analysis and microscopic observation with polarizers,we found multimosaic structure of numberless twin-crystal boundaries for some ZnSe crystals. These bound- aries are evidently leading to a formation of potential wells that are responsible for the 2D character. This character of the magneto-optical absorption signal show up for above-mentioned samples.3)Through the time-resolved cyclotron resonance of GaAs, the temperature dependence of electron-phonon scattering, magnetic field and concentration dependence of the electron- neutral donor scattering and electron-density dependence of carrier-carrier scatering have been investigated.4)Time-resolved measurements of the magneto-optical absorption due to photoexcited electrons have been carried out in order to investigate the relaxation of spin hot electrons in p-type InSb samples. It was found that the spin flipping time is primarily determined by donor impurity scattering and is independent of their charge states.

在这项工作中，毫米波和亚毫米波磁吸收测量为研究能带结构、载流子输运、动力学等提供了方法，并直接对Ge、InSb、GaAs和AnSe等材料进行了表征。实验结果如下：1)首次在ZnSe中观察到重空穴回旋共振。共振几乎是各向同性的，相当于极化子有效质量m_p=1.04M_o。2)通过X射线分析和偏光镜显微镜观察，我们发现了一些ZnSe晶体具有数不清的孪晶界的多马赛克结构。这些束缚-白羊座显然导致了潜在势井的形成，这是2D角色的原因。3)通过GaAs的时间分辨回旋共振，研究了电子-声子散射的温度依赖关系、电子-中性施主散射的磁场和浓度依赖关系以及载流子-载流子散射的电子密度依赖关系。4)为了研究p型InSb样品中自旋热电子的驰豫，进行了光激电子磁光吸收的时间分辨测量。结果表明，自旋翻转时间主要由施主杂质散射决定，与它们的电荷态无关。

项目成果

H. Kobori: Solid State Communication. 63. 123-126 (1987)

H. Kobori：固态通信。

T.Ohyama: "Cyclotron Resonance of Photoexcited Holes in High Quality ZnSe" Japanese Journal of Applied Physics. 26. L136-L138 (1987)

T.Ohyama：“高质量 ZnSe 中光激发空穴的回旋共振”日本应用物理学杂志。

K.Fujii: "Far-Infrared Magneto-optical Study of Photoexcited Indium Antimonide. II. Spin Properties" Japanese Journal of Applied Physics. 26. 868-880 (1987)

K.Fujii：“光激发锑化铟的远红外磁光研究。II.自旋特性”日本应用物理学杂志。

T. Ohyama: Physical Review. B37. (1988)

T. Ohyama：《物理评论》。

H.Kobori: "Quantum Limit Cyclotron Resonance in p-GaAs" Solid State Communication. 63. 123-126 (1987)

H.Kobori：“p-GaAs 中的量子极限回旋共振”固态通信。