"A Series of Studies on Polarons, Excitons, New Condensed States of Elementary Excitations into the Mechanism of Superconductive-Conjugate Photoconductive Phenomean"

“极化子、激子、基本激发的新凝聚态对超导-共轭光电导现象机制的一系列研究”

• 批准号: 01065001
• 负责人: MASUMI Taizo
• 金额: $ 92.16万
• 依托单位: The University of Tokyo, College of Arts and Sciences.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Specially Promoted Research
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01065001/
• 关键词: Elementary Excitations; Polarons; Excitons; Condensed States; Superconductive Insulator; Superconductive-Conjugate Photoconductivity; Superconductive-Conjugate Photoresponse; Superconductive Optoelectronics; 超伝導性潜在絶縁体; 超伝導性潜在絶緑体; ポーラロン

1) Crystal Growth and Refinement of Ultrapure Silver Halides, Mixed Crysitals and of Superconductive-Conjugate Photoconductive Substances ; We have prepared ultrapure AgCl_xBr_<1-x> crystals, a series of superconductive-conjugate photoconductive substances Y-Ba-Cu-O, La-Cu-O, Ba-Pb-Bi-O, Bi-Sr-Ca-Cu-O, Nd-Ce-Cu-O, Bi-SrCa (Lay) -Cu-O systems, and refined their basic substances Cu_2O, Bi_2O_3.2) New Condensed States of Elementary Excitations in High-Speed and Highly-Resolved Optical Experiment ; We have confirmed the two-to one-phonon mode type transformation in AgCl_xBr_<1-x> via FIR reflection spectra, and particularly reexamined the temperature dependence of FIR reflection and optical absorbance of pure Cu_2O in a basic aspect of the superconductive-conjugate phenomena.3) Nonlinear Responses, Anomalous Distribution, and Dynamics of Carriesr or Polarons at Crossed Intense Electric and Magnetic Fields ; We have newly observed an anomalous reduction in the electron-LO phonon coupling co … More nstant in AgCl_xBr_<1-x> and a role of the acoustic phonons in polaron dynamics at the momentum space accumulation in piezoelectric semiconductors Cds.4) Superconductive-Conjugate Photocondutivity due to Ploarons and Excitons and their Mechanism ; We have intensively and extensively examined the conjugative phenomena between photoconductivity and superconductivity of the Y_<3-x>-Ba_x-Cu_3-O_z, Ba_1-Pb_<1-x>-Bi_x-O_3, Nd_2-Cu_1-O_4 and Bi_2-(Sr_2Y_1)_x-Cu_2-O_z systems and their basic substance Cu_2O, Bi_2O_3 to experimentally clarify the correlation between anomalies in photoconductivity and occurrence of superconductivity. We have observed also similar correlation in C_<60> and SrCuO_2.5) Photomagnetism due to Elementary Excitation and their Condensed States with Relaxation in Polar Semiconductors and Ionic Crystals ; We have pursued the photomagnetism by studying cyclotron resonance of polarons in Cu_2O at high density excitations and discovered a peculiar type of orbital diamagnetism which reveals an existence of mid-gap states via a new optical-cyclotron duouble resonance method.6) Basic Concepts of Superconductive Optoelectronic Devices ; We have proposed the possibilities to constitute several of supercon ductive optoelectronic devices and apparatus by combining superconductive oxides and superconductive-conjugate photoconductors close to each other in compositions or their basic substances Cu_2O, Bi_2O_3. United State Patents on these item have been granted.7) Theoretical Studies of Nonlinear Responses and Dyanmics of Polaron, Elementary Excitations and their Condensation, and of the Mechanism of the Superconductive-Conjugate Photoconductivity ; We have given a computer analysis of the band warping effect on the streaming and bunching phenomena in semiconductors. We have also proposed a hypothesis on the mechanism of superconductive-conjugate photoconductivity.United States Patent (Granted), US Patent No. 4, 990, 487 ; Date : Feb. 5th, 1991 valid until Feb. 5, 2008 ; "SUPERCONDUCTIVE OPTOPELECTRONIC DEVICES", Inventor : Taizo Masumi, Assigne : The University of Tokyo.USPTO Notice of Allowance, dated Jan. 24th, 1992, US Appl. No07/696, 999 : THE UNIVERSITY OF TOKYO, Inventor : Taizo Masumi, For : "PHOTOCONDUCTIVE-SUBSTANCE OF THE Y-BA-CU-O SYSTEM AND A METHOD FOR PRODUCING THE SAME"(AS AMENDED). Less

1)超纯卤化银、混合晶体和超导共轭光导物质的晶体生长和细化；制备了超纯AgCl_xBr_<1-x>晶体和一系列超导共轭光导物质Y-Ba-Cu-O、La-Cu-O、Ba-Pb-Bi-O、Bi-Sr-Ca-Cu-O、Nd-Ce-Cu-O、Bi-SrCa (Lay) -Cu-O体系，并在高速高分辨光学实验中提纯了它们的基本物质Cu_2O、Bi_2O_3.2)新凝聚态；我们通过FIR反射光谱证实了AgCl_xBr_<1-x>中的二声子到一声子模式型转换，并从超导共轭现象的基本方面重新研究了纯Cu_2O的FIR反射和光吸收对温度的依赖关系。3)强电磁场下载流子或极化子的非线性响应、异常分布和动力学；在AgCl_xBr_<1-x>中，我们观察到电子- lo声子耦合co的异常减少，并且声子在压电半导体cd中动量空间积累的极化子动力学中的作用。本文对Y_<3-x>- ba_x - cu_3 - o_z、Ba_1-Pb_<1-x>- bi_x - o_3、Nd_2-Cu_1-O_4和Bi_2-(Sr_2Y_1)_x-Cu_2-O_z体系及其基本物质Cu_2O、Bi_2O_3的光导率异常与超导性之间的共轭现象进行了深入而广泛的研究，以实验方式阐明光导率异常与超导性的关系。在极性半导体和离子晶体中，我们也观察到C_<60>和SrCuO_2.5)在初等激发下的光磁性及其弛豫凝聚态的相似关系；我们通过研究Cu_2O中极化子在高密度激发下的回旋共振来追求光磁性，并通过一种新的光回旋双共振方法发现了一种特殊类型的轨道抗磁性，它揭示了中隙态的存在。6)超导光电器件基本概念；我们提出了将超导氧化物和超导共轭光导体在组成物或其基本物质Cu_2O， Bi_2O_3上接近的组合构成几种超导光电子器件和器件的可能性。这些项目已获得美国专利。7)极化子非线性响应和动力学、初等激发及其凝聚的理论研究，以及超导-共轭光电导率机理的理论研究；我们用计算机分析了带翘曲效应对半导体中流和聚束现象的影响。我们还对超导共轭光电导率的机理提出了假设。美国专利（授权），美国专利号4,990,487；日期：1991年2月5日至2008年2月5日；“超导光电器件”，发明者：增井泰三，任职者：东京大学。1992年1月24日，美国专利商标局许可通知。1999年第07号：东京大学，发明家：增正泰三，获奖原因：“Y-BA-CU-O体系的光导物质及其生产方法”（经修订）。少

项目成果

Shoji Mimotogi: "Transition of Hybridization of Lattice Vibrational Modes in the Mixed Crystal System AgCl_XBr_<1-X>" Proc.20th Int.Conf.Phys.Semiconductors.Thessaloniki,Greece,Aug.6-10,(1990). 2021-2024 (1990)

Shoji Mimotogi：“混合晶体系统 AgCl_XBr_<1-X> 中晶格振动模式杂化的转变”Proc.20th Int.Conf.Phys.Semiconductors.Thessaloniki，希腊，Aug.6-10，（1990 年）。

Shoji Mimotogi: "Anomalous Electron-LO Phonon Interaction in Cyclotron Resonance of Polarons in the Mixed AgCl_XBr_<1-X> System" J.Phys.Soc.Japan. 61. (1992)

Shoji Mimotogi：“混合 AgCl_XBr_<1-X> 系统中极化子回旋共振中的反常电子-LO 声子相互作用”J.Phys.Soc.Japan。

Hidetoshi Minami: "Influence of Exction Formation Effect in the Photoconductivity of New Semiconductor Bi_2O_<3;>;M^<2+>" Proc.20th Int.Conf.Phys.Semiconductors.Thessaloniki,Greece,Aug.6-10,(1990). 2299-2302 (1990)

Hidetoshi Minami：“激发形成效应对新型半导体 Bi_2O_<3;>;M^<2> 光电导率的影响”Proc.20th Int.Conf.Phys.Semiconductors.Thessaloniki，希腊，Aug.6-10，（1990

Taizo Masumi: "An Obsevation of Quantized Step or Clew Temperatures in Supercondrctive-Conjugate Photoconductivity of Cu_2O" J.Phys.Soc.Japan. 60. 3633-3636 (1991)

Taizo Masumi：“Cu_2O 超导共轭光电导中量子化阶跃或线团温度的观察”J.Phys.Soc.Japan。

Hiroshi Shimada: "Hall Mobility of Positive Holes in Cu_2O" J.Phys.Soc.Japan.58. 1717-1724 (1989)

Hiroshi Shimada：“Cu_2O 中正空穴的霍尔迁移率”J.Phys.Soc.Japan.58。