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Study of Polarons and Solitons on Quasi-One-Dimensional, Mixed Valence Platinum Complexes

Research Project

Project/Area Number 01460032
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionYokohama National University

Principal Investigator

KURITA Susumu  Yokohama National University, Faculty of Engineering, Professor, 工学部, 教授 (30089833)

Co-Investigator(Kenkyū-buntansha) YAGI Mikio  Yokohama National University, Faculty of Ebgineering, Associate Professor, 工学部, 助教授 (00107369)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1990: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1989: ¥6,500,000 (Direct Cost: ¥6,500,000)
KeywordsPolaron / Soliton / One-dimensional material / Photo-induced absorption / Photo-induced defect / Platinum complex / 白金鎖体 / 電荷移動吸収 / 光物性(光学的性質)
Research Abstract

Halogen-bridged, mixed-valence Platinum complexes are typical quasi-one-dimensional semiconductors. The fundamental absorption is characterized by the intervalence charge transfer transition from Pt^<2+> to Pt^<4+> (CT band). We have found that two new absorption bands grow up near the midgap when the CT band is excited by laser. These photo-induced defects are concluded to be an electron and hole polarons pair on single chains by measuring the photo-induced or Halogen dope-induced ESR and optical absorption spectra. Upon halogen doping, singly charged polarons are produced and the formations of confined charged soliton pairs (bipolarons) via the process P^++P^+ -> S^++S^+ (or BP^<2+>) is favored.
The luminescence spectra due to the e-h recombination are studied in details as function of the excitation photon energy (E_X) and temperature. One of results that the luminescence peak shifts to low energy with decreasing E_X at the low energy side of the CT band but is constant above the CT band, is well explained by taking account of the distribution of the e-h distance and the temperature dependence of the mobility of polarons. Transient photocurrent measurements in pure and halogen-doped crystals at room temperature show that the drift mobility of both electron and hole in the E b direction (b ; chain axis) and that of the electron in the E b do not change by halogen-doping. However, the mobility of hole in the E b direction varies from 2 (pure) to 12 cm^2/V・sec (doped) in the iodine compound. These results lead the conclusions that the polarons are mobile only athigh temperature, hole polarons are injected by halogen doping, the doped halogens are located on the interchains and serve as hopping centers.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] H.Oshio: "Structural,Magnetic,and Optical Studies of New MixedーValence Copper(II)ーPlatinum(IV)Complexes with OneーDimensional chain Strures." J.Chem.Soc.DALTON TRANS.1013-1017 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] L.DEgiorgi: "Phonons in OneーDimensional PeierlsーHubbard Systems." Phys.Rev.B42. 4341-4350 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Sato: "Structue of Bis(ethylenediamide)Platinum(II)Dichloride." Acta Ctyst.C46. 1107-1108 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Sato: "Structure of transーDichlorobis(ethylenediamine) platinum(IV)Perchlorate, transー[PtCl_2(NH_2CH_2CH_2NH_2)_2] (ClO_4)_2." Acta Cryst.C46. 1812-1815 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Kurita: "Polaronic States Induced by Photoーexcitation and Halogenーdoping in Quasiーoneーdimensional,Mixedvalence Platinum Complexes." Synth.Metals. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K.Toriumi: "Phase Transitions of the Halogenーbridged M(II)ーXーM(IV)Mixedーvalence Compounds(of [M(en)_2][MX_2(en)_2](ClO_4)_4(M=Pt,Pd;X=Cl,Br)" Acta Cryst.Sect.(1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Kurita and M. Haruki: "Experimental Evidence of Polaronic States in Halogen Bridged Mixed Valence Platinum Complexes." Synth. Metals. 29. 129-136 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] L. Degiorgi, P. Wachter, M. Haruki and S. Kurita: "Far Infrared Reflectivity Measurements on Quasi One Dimensional Halogen Bridged Mixed Valence Compounds." Synth. Metals,. 29. 137-144 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Haruki and S. Kurita: "Polarons and Soliton Pairs (Bipolarons) in Halogen-doped Quasi-one-dimensional Mixed-valence Platinum Complexes." Phys. Rev.,. B39, No. 9. 5706-5712 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] L. Degiorgi, P. Wachter, M. Haruki and S. Kurita: "Far-infrared Optical Investigations on Quasi-one-dimensional Halogen-bridged Mixed Valence Compounds." Phys. Rev.,. B40, No. 5. 3285-3293 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] H. Oshio, K. Toriumi, S. Bandow, K. Miyagawa and S. Kurita: "Structural, Magnetic, and Optical Studies of New Mixed-valence Copper (II)-Platinum (IV) Complexes with One-dimensional Chain Structure." J. Chem. Soc. Dalton Trans.,. 1013-1017 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Sato, M. Haruki and S. Kurita: "Structure of Bis (ethylenediamine) Platinum (II) Dichloride." Acta Cryst.,. C46. 1107-1108 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] L. Degiorgi, P. Wachter, M. Haruki and S. Kurita: "Phonons in One-dimensional Peierls-Habbard Systems." Phys. Rev.,. B42, No. 7. 4341-4350 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Sato, M. Haruki, P. Wachter and S. Kurita: "Structure of trans-Dichlorobis (ethylenediamine) platinum (VI) Perchlorate, trans-[PtCl_2(NH_2CH_2CH_2NH_2)_2] (ClO_4)_2" Acta Cryst.C46. 1812-1915 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Kurita, J. Ishikura and M. Haruki: "Polaronic States Induced by Photo-excitation and Halogen-doping in Quasi-one-dimensional, Mixed-valence Platinum Complexes." Synth. Metals.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K. Toriumi, M. Yamashita, S. Kurita, I. Murase and T. Ito,: "Phase Transitions of the Halogen-bridged M (II)-X-M (IV) Mixed-valence Complexes of [M(en)_2][MX_2(en)_2] (ClO_4)_4 (M=Pt, Pd ; X=Cl, Br)." Acta Cryst. Sect. B.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K. Aida, J. Takeda and S. Kurita: "Excitation Energy Dependence of the Photoluminescence from Self-trapped Exciton in Halogen-bridged Mixed-valence Platinum Complexes." J. Phys. Jpn.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] H.Oshio: "Structural,Magnetic,and Optical Studies of New MixedーValence Copper(II)ーPlatinum(IV) Complexes with OneーDimensional chain Structures." J.Chem.Soc.DALTON TRANS.1013-1017 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] L.Degiorgi: "Phonons in OneーDimensional PeierlsーHubbard Systems." Phys.Rev.B42. 4341-4350 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Sato: "Structure of Bis(ethylenediamide)Platinum(II) Dichloride." Acta Ctyst.C46. 1107-1108 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Sato: "Structure of transーDichlorobis(ethylenediamine) platinum(IV) Perchlorate,transー[PtCl_2(NH_2CH_2CH_2NH_2)_2)]" Acta Cryst.C46. 1812-1815 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Kurita: "Polaronic States Induced by Photoーexcitation and Halogenーdoping in Quasiーoneーdimensional,Mixedーvalence Platinum Complexes." Synth.Metals. (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Toriumi: "Phase Transitions of the Halogenーbridged M(II)ーXーM(IV) Mixedーvalence Compound of [M(en)_2][MX_2(en)_2](ClO_4)_4(M=Pt,Pd;X=Cl,Br)" Acta Cryst.Sect.B. (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] L.Degiorgi: "Far-infrared optical investigations on quasi-onedimensional halogen-bridged mixed-valence compounds" Physical Review B. 40. 3285-3293 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] K.Aida: "Excitation energy dependence of the photoluminescence from self-trapped exciton in halogen-bridged mixedvalence platinum complexes." Journal of physical Society of Japan.

    • Related Report
      1989 Annual Research Report
  • [Publications] L.Degiorgi: "Phonons in one-dimensional Peierls-Hubbard systems" To be submitted to Physical Review B.

    • Related Report
      1989 Annual Research Report
  • [Publications] S.Sato: "Structure of trans-dichlorobis(ethylenediamine)Platinum(4)Perchlorate." Acta Crystallo Graphia. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] S.Sato: "Structure of bis(ethylenediamine)platinum dechloride." Acta Crystallo Graphia. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] 栗田進: "擬一次元ハロゲン架橋白金錯体におけるソリトンとポ-ラロン" 固体物理. 24. 594-605 (1989)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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