1991 Fiscal Year Annual Research Report

ポ-ラロンなどの素励起の新しい凝縮状態と超伝導性光応答発現機構の研究

Research Project

Project/Area Number	01065001
Research Institution	The University of Tokyo, College of Arts and Sciences.
Principal Investigator	眞隅泰三東京大学, 教養学部, 教授 (20012304)
Co-Investigator(Kenkyū-buntansha)	黒沢達美中央大学, 理工学部, 教授 (80055061) 南英俊東京大学, 教養学部, 助手 (00190702)
Keywords	素励起 / ポ-ラロン / 励起子 / 凝縮状態 / 超伝導性潜在絶縁体 / 超伝導性光伝導 / 超伝導性光応答発現機構 / 超伝導オプトエレクトロニクス
Research Abstract	1)超高純度ハロゲン化銀結晶の精製及びその混晶並びに新しい超伝導性光伝導物質の作製の研究:超伝導性光伝導物質として、新しくBiーSrCa(LaY)ーCuーO系を組織的にしらべた。また特に超伝導性光伝導現象の基本物質と考えられるCu_2Oの単結晶の精製にも力を注いだ。2)極低温における高速、高分解能光物性測定装置による素励起の凝縮状態の研究:超高純度AgCl_xBr_<1ーx>結晶の遠赤外領域での反射の精密測定で混成フオノン様式の型の遷移を確認した。3)強磁場、高電場制御での半導体内担体、ポ-ラロン系の非線形応答と特異な分布状態及び、そのダイナミクスの研究:超高純度AgCl_xBr_<1ーx>結晶でのポ-ラロン系のサイクロトロン共鳴の実験を行い、結合定数の異常な減少を発見した。4)超伝導性光伝導物質におけるポ-ラロンと励起子の光伝導現象による超伝導性光応答機構の研究:Y_<3ーx>Ba_xーCu_3ーO_z系,及びBa_1ーPb_<1ーx>ーBi_xーO_z系、Nd_2ーCu_1ーO_z系及びBi_2ー(Sr_2Ca_1)_<1ーx>ー(La_2Y_1)_xCu_2ーO_z系でのパルス光伝導現象と超伝導現象との共役性の詳細な研究を行った。また超伝導共役性光伝導基本物質と考えられている絶縁体Cu_2O,Bi_2O_3についてのパルス光伝導の実験結果の他、光伝導の異常と相転移の相関の研究に力点を戻し、C_<60>やSrCuO_2などの同様な研究を展開した。5)極低温における半導体、イオン結晶内での素励起及びそれらの凝縮系の光磁性と緩和機構のダイナミクスの研究:高密度光励起状態Cu_2Oの光磁性をサイクロトロン共鳴で追求し,midーgap statesの存在を示唆する可視光ーマイクロ波2重共鳴現象という特異な軌道反磁性を発見した。6)超伝導オプトエレクトロニクス素子の基礎研究:絶縁体Cu_2Oなどは、これまで予測されていない超伝導性と深い相関をもつ光伝導性を示すので、これらを組み合せた超伝導オプトエレクトロニクス素子を提案した。7)ポ-ラロンなどの素励起とそれらの凝縮状態及び半導体内担体の非線形応答とダイナミクス及び超伝導性光応答機構の理論的研究:実験結果の総合的な考察を続行し、超伝導性光応答機構について、1つの仮説を提起した。その他、国有特許の国内及び国外出願とその対応にも努力し、その結果アメリカ合衆国特許庁よりUSPTO Notice of Allowance,dated Jan.24th,1992,US Appl.No.07/696,999:THE UNIVERSITY OF TOKYO,Inventor:Taizo Masumi,For:"PHOTOCONDUCTIVEーSUBSTANCE OF THE YーBAーCUーO SYSTEM AND A METHOD FOR PRODUCING THE SAME"(AS AMENDED)という認可の予備通知を受けた。

Research Products

(16 results)

All Other

All Publications (16 results)

[Publications] Taizo Masumi: ""Nonlinear Energy Spectra,Anomalous Distribution and Life Time of Polarons and Excitons in Silver Halides"" Proc.The 44th annual conf.The Soc.Imaging Science and Technology,May,1991,St.Paul,USA. (1991)
[Publications] Taizo Masumi: ""Superconductive-Conjugate Photoconductivity of the Bi_2(Sr_2Ca_1)_<1-x>(La_2Y_1)_xcu_2O_Z System"" Physica. C185-189. 967-968 (1991)
[Publications] Hiroyuki Yamaguchi: ""Superconductive-Conjugate Photoconductivity of Nd_2Cu_1O_4"" Physica. C185-189. 965-966 (1991)
[Publications] Hidetoshi Minami: ""Electronic Transport Phenomena in Semiconductive Phase BaPb_<1-x>Bi_xO_3"" Physica. C185-189. 1257-1258 (1991)
[Publications] Taizo Masumi: ""Dielectric Anomalies and Photoconductivity in Host Insulator Cu_2O Correlative with High-T_c superconductivity"" J.Phys.Soc.Japan. 60. 3625-3628 (1991)
[Publications] Taizo Masumi: ""Nonlinear Optical Phenomena in Cyclotron Resonance of Positive Holes and Electrons in Cu_2O"" J.Phys.Soc.Japan. 60. 3629-3628 (1991)
[Publications] Taizo Masumi: ""An Observation of Quantized Step or Clew Temperatures in Superconductive-Conjugate Photoconductivity of Cu_2O"" J.Phys.soc.Japan. 60. 3633-3636 (1991)
[Publications] Taizo Masumi: ""Superconductive-Conjugate Photoconductivity in Host Insulators of the Y_<3-x>Ba_x-Cu_3-O_z System"" J.Phys.soc.Japan. 60. 4036-4039 (1991)
[Publications] Hidetoshi Minami: ""Novel Temperature Dependence of Photoconductivity in New Semiconductor Bi_2O_3;M^<2+>"" J.Phys.soc.Japan. 60. 4040-4043 (1991)
[Publications] Tatsumi Kurosawa: ""Momentum Space Bunching of Carriers in semiconductors under Crossed Magnetic and Intense Microwave Fields.II.Warped Band Case"" J.Phys.soc.Japan. 60. 4245-4252 (1991)
[Publications] Norihisa Ishida: ""DC Field Response of Carriers Bunched in Momentum Space under Crossed Intense Microwave and Magnetic Fields"" Proc.7th Int.Conf.on Hot Carriers,Nara,. (1991)
[Publications] Shoji Mimotogi: ""Transformation of Phonon Modes Behaviour in the AgCl_xBr_<1-x> System"" J.Phys.soc.Japan. 61. 727-734 (1992)
[Publications] Shoji Mimotogi: ""Anomalous Electron-LO Phonon Interaction in Cyclotron Resonance of Polarons in the Mixed AgCl_xBr_<1-x> System"" J.Phys.Soc.Japan. (1992)
[Publications] Hiroshi Shimada: ""Dynamics of Hot Electrons Accumulated in the Velocity Space of CdS with Acoustic Phonon Interaction"" J.Phys.Soc.Japan. (1992)
[Publications] Hidetoshi Minami: ""Spectral Photoconductivity of the BaPb_<1-x>Bi_xO_3 System with a Proposal for the Electronic Structure"" PHASE TRANSITIONS. (1992)
[Publications] Taizo Masumi;Inventor: ""PHOTOCONDUCTIVE-SUBSTANCE OF THE Y-BA-CU-O SYSTEM AND A METHOD FOR PRODUCING THE SAME (AS AMENDED)"" USPTO Notice of ALLowance,US Appln.No.07/696,999:THE UNIVERSITY OF TOKYO,dated January 24,. (1992)

1991 Fiscal Year Annual Research Report

ポ-ラロンなどの素励起の新しい凝縮状態と超伝導性光応答発現機構の研究

Principal Investigator

眞隅 泰三 東京大学, 教養学部, 教授 (20012304)

Research Products

[Publications] Taizo Masumi: ""Nonlinear Energy Spectra,Anomalous Distribution and Life Time of Polarons and Excitons in Silver Halides"" Proc.The 44th annual conf.The Soc.Imaging Science and Technology,May,1991,St.Paul,USA. (1991)

[Publications] Taizo Masumi: ""Superconductive-Conjugate Photoconductivity of the Bi_2(Sr_2Ca_1)_<1-x>(La_2Y_1)_xcu_2O_Z System"" Physica. C185-189. 967-968 (1991)

[Publications] Hiroyuki Yamaguchi: ""Superconductive-Conjugate Photoconductivity of Nd_2Cu_1O_4"" Physica. C185-189. 965-966 (1991)

[Publications] Hidetoshi Minami: ""Electronic Transport Phenomena in Semiconductive Phase BaPb_<1-x>Bi_xO_3"" Physica. C185-189. 1257-1258 (1991)

[Publications] Taizo Masumi: ""Dielectric Anomalies and Photoconductivity in Host Insulator Cu_2O Correlative with High-T_c superconductivity"" J.Phys.Soc.Japan. 60. 3625-3628 (1991)

[Publications] Taizo Masumi: ""Nonlinear Optical Phenomena in Cyclotron Resonance of Positive Holes and Electrons in Cu_2O"" J.Phys.Soc.Japan. 60. 3629-3628 (1991)

[Publications] Taizo Masumi: ""An Observation of Quantized Step or Clew Temperatures in Superconductive-Conjugate Photoconductivity of Cu_2O"" J.Phys.soc.Japan. 60. 3633-3636 (1991)

[Publications] Taizo Masumi: ""Superconductive-Conjugate Photoconductivity in Host Insulators of the Y_<3-x>Ba_x-Cu_3-O_z System"" J.Phys.soc.Japan. 60. 4036-4039 (1991)

[Publications] Hidetoshi Minami: ""Novel Temperature Dependence of Photoconductivity in New Semiconductor Bi_2O_3;M^<2+>"" J.Phys.soc.Japan. 60. 4040-4043 (1991)

[Publications] Tatsumi Kurosawa: ""Momentum Space Bunching of Carriers in semiconductors under Crossed Magnetic and Intense Microwave Fields.II.Warped Band Case"" J.Phys.soc.Japan. 60. 4245-4252 (1991)

[Publications] Norihisa Ishida: ""DC Field Response of Carriers Bunched in Momentum Space under Crossed Intense Microwave and Magnetic Fields"" Proc.7th Int.Conf.on Hot Carriers,Nara,. (1991)

[Publications] Shoji Mimotogi: ""Transformation of Phonon Modes Behaviour in the AgCl_xBr_<1-x> System"" J.Phys.soc.Japan. 61. 727-734 (1992)

[Publications] Shoji Mimotogi: ""Anomalous Electron-LO Phonon Interaction in Cyclotron Resonance of Polarons in the Mixed AgCl_xBr_<1-x> System"" J.Phys.Soc.Japan. (1992)

[Publications] Hiroshi Shimada: ""Dynamics of Hot Electrons Accumulated in the Velocity Space of CdS with Acoustic Phonon Interaction"" J.Phys.Soc.Japan. (1992)

[Publications] Hidetoshi Minami: ""Spectral Photoconductivity of the BaPb_<1-x>Bi_xO_3 System with a Proposal for the Electronic Structure"" PHASE TRANSITIONS. (1992)

[Publications] Taizo Masumi;Inventor: ""PHOTOCONDUCTIVE-SUBSTANCE OF THE Y-BA-CU-O SYSTEM AND A METHOD FOR PRODUCING THE SAME (AS AMENDED)"" USPTO Notice of ALLowance,US Appln.No.07/696,999:THE UNIVERSITY OF TOKYO,dated January 24,. (1992)

眞隅泰三東京大学, 教養学部, 教授 (20012304)