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2005 Fiscal Year Final Research Report Summary

Design and development of metallic crystals composed of single-component molecules

Research Project

Project/Area Number 14103005
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Research Field 機能・物性・材料
Research InstitutionThe University of Tokyo

Principal Investigator

KOBAYASHI Akiko  The University of Tokyo, Research Centre for Spectrochemistry, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (50011705)

Co-Investigator(Kenkyū-buntansha) FUJIWARA Emiko  The University of Tokyo, Research Centre for Spectrochemistry, Graduate School of Science, Research Assistant, 大学院・理学系研究科, 助手 (30361562)
Project Period (FY) 2002 – 2005
KeywordsSingle-Component Molecular Metals / Molecular Conductors / Dithiolate Metal Complex / Antiferromagnetic Phase Transition / Molecular Alloy Systems / Three-Dimensional Fermi Surfaces
Research Abstract

In this work, in order to realize the single-component metallic molecular magnets and molecular superconductors with various extended-TTF ligands, the structures, physical properties and molecular functions of a series of new developed single-component complexes were investigated.
To obtain direct evidence for the existence of Fermi surfaces in the first neutral metal complex molecule [Ni(tmdt)_2] (tmdt=trimethylenetetrathiafulvalenedithiolate), we have carried out experiments to measure magnetic quantum oscillations, namely de Haas-van Alphen (dHvA) oscillations, in high magnetic fields up to 33 T using a microcantilever. The observation of the dHvA signal in [Ni(tmdt)_2] demonstrates that it is a single-component molecular crystal which not only shows metallic conductivity behavior down to low temperatures, but also exhibits high-quality quantum oscillations characteristic of a Fermi surface. These results unambiguously show the existence of 3D Fermi surfaces for both holes and electr … More ons in this molecular crystal.
To create the single-component metallic molecular magnets with a high transition temperature, [Au(tmdt)_2] was developed, which is isostructural to that of [Ni(tmdt)_2]. Unlike the neutral bis (dithiolato) nickel complex, the neutral bis (dithiolato) gold complex has an odd number of total electrons. The spin susceptibilities study of [Au(tmdt)_2] showed an unusual antiferromagnetic phase transition around 110K, which is higher than that of the classical antiferromagnetic metal Mn around 100K. More recently, the metallic behavior down to phase transition temperature was observed by the resistivity measurements on a microcrystal of [Au(tmdt)_2], which indicate that the single-component metallic molecular magnets have been realized.
Since the Fermi surfaces of [Ni(tmdt)_2] are quite different from those of [Au(tmdt)_2], the molecular alloy system will be expected to be the single-component molecular superconductor. We have succeeded to prepare the first "single-component alloy system" [Ni_<1-x>Au_x(tmdt)_2](0<x<1). The resistivity of single crystal of [Ni_<0.75>Au_<0.25>(tmdt)_2] was abruptly deceasing below 2K, and the magnetic susceptibility was also slightly decreasing at the temperature range form 1.8 to 0.8K, which maybe stem from the partially appeared superconducting state. We think the "single-component molecular superconductor" may be realized in such an alloy system. Less

  • Research Products

    (42 results)

All 2006 2005 2004 2003 2002

All Journal Article (42 results)

  • [Journal Article] Superconductivity and Bortex Phases in the Two-dimensional Organic conductor -(BETS)_2Fe_xGa_1-xCl_4 (x=0.45)2006

    • Author(s)
      S.Uji et al.
    • Journal Title

      Phys. Rev. B 71

      Pages: 104525-1-104525-7

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ab Initio Electronic Structure Calculation for Single-Component Molecular Conductor Au(tmdt)_2 (tmdt = trimethylenetetrathiafulvalenedithiolate)2005

    • Author(s)
      S.Ishibashi et al.
    • Journal Title

      J. Phys. Soc. Joa., 74

      Pages: 843-846

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Crystal Structures and Physical Prooerties of Single-component Molecular Conductors consisting of Nickel and Gold Complexes with Bis(trifluoromethyl) tetrathiafulvalenedithiolate Ligands2005

    • Author(s)
      M.Sasa et al.
    • Journal Title

      J. Mater. Chem. 15

      Pages: 155-163

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of Metallic Crystals Composed of Single-component Molecules2005

    • Author(s)
      A.Kobayashi et al.
    • Journal Title

      J. Mater. Chem. 15

      Pages: 3449-3451

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Single-Component Molecular Conductor [Zn(tmdt)_2] and Related Zn complexes2005

    • Author(s)
      K.Yamamoto et al.
    • Journal Title

      Chem. Lett. 34

      Pages: 1090-1091

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Molecular Conductors Based on prei-Ditellurium Bridged Donors. 2,3-DMTTeA and TMTTeN2005

    • Author(s)
      E.fujiwara et al.
    • Journal Title

      Eur. J. Inorg. Chem. 2005

      Pages: 3435-3449

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ab Initio Electronic Structure Calculation for Single-Component Molecular Conductor Au(tmdt)_2 (tmdt=trimethylenetetrathiafulvalenedithiolate)2005

    • Author(s)
      S.Ishibashi et al.
    • Journal Title

      J.Phys.Soc.Jpn. 74

      Pages: 843-846

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Crystal Structures and Physical Properties of Single-component Molecular Conductors Consisting of Nickel and Gold Complexes with Bis (trifluoromethyl) tetrathiafulvalenedithiolate Ligands2005

    • Author(s)
      M.Sasa et al.
    • Journal Title

      J.Mater.Chem. 15

      Pages: 155-163

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of Metallic Crystals Composed of Single- Component Molecules2005

    • Author(s)
      A.Kobayashi et al.
    • Journal Title

      J.Mater.Chem. 15

      Pages: 3449-3451

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Single-Component Molecular Conductor [Zn(tmdt)_2] and Related Zn Complexes2005

    • Author(s)
      K.Yamamoto et al.
    • Journal Title

      Chem.Lett. 34

      Pages: 1090-1091

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Molecular Conductors Based on prei-Ditellurium Bridged Donors, 2,3-DMTTeA and TMTTeN2005

    • Author(s)
      E.Fujiwara et al.
    • Journal Title

      Eur.J.Inorg.Chem. 2005

      Pages: 3435-3449

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Superconductivity and Vortex Phases in the Two-dimensional Organic Conductor ?-(BETS)_2Fe_xGa_<1-x>Cl_4 (x=0.45)2005

    • Author(s)
      S.Uji et al.
    • Journal Title

      Phys.Rev. B 71

      Pages: 104525-1-104525-7

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Infrared Electronic Absorption in a Single-Component Molecular Metal.2004

    • Author(s)
      A.Kobayashi et al.
    • Journal Title

      J. Am. Chem. Soc. 126

      Pages: 426-427

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Syntheses, Structures, and Physical Properties on Nickel Bis(dithiolen) Complexes Containing Tetrathiafulvalene (TTF) Units2004

    • Author(s)
      E.fujiwara et al.
    • Journal Title

      Inorg. Chem. 43

      Pages: 1122-1129

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Recent Progress in Development of Single-Component Molecular Metals2004

    • Author(s)
      a.Kobayashi et al.
    • Journal Title

      J. Phys. IV France 114

      Pages: 419-424

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Obserbation of Three-dimensional Fermi Surfaces in a Single-component Molecular Metal, [Ni(tmdt)_2]2004

    • Author(s)
      H.Tanaka et al.
    • Journal Title

      J. Am. Chem. Soc. 126

      Pages: 10518-10519

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Single-component Molecular Metals with Extended-TTF dithiolate Ligands2004

    • Author(s)
      A.Kobayashi et al.
    • Journal Title

      Chem. Rev. 104

      Pages: 5243-5264

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Organic Metals and Superconductors Based on BETS (BETS-bis(ethylenedithio9tetraselenafulvalene)2004

    • Author(s)
      H.Kobayashi et al.
    • Journal Title

      Chem. Rev. 104

      Pages: 5265-5288

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Infrared Electronic Absorption in a Single-Component Molecular Metal.2004

    • Author(s)
      A.Kobayashi et al.
    • Journal Title

      J.Am.Chem.Soc. 126

      Pages: 426-427

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Syntheses, Structures, and Physical Properties of Nickel Bis (dithiolene) Complexes Containing Tetrathiafulvalene (TTF) Units2004

    • Author(s)
      E.Fujiwara et al.
    • Journal Title

      Inorg.Chem. 43

      Pages: 1122-1129

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Recent Progress in Development of Single-Component Molecular Metals2004

    • Author(s)
      A.Kobayashi et al.
    • Journal Title

      J.Phys. IV France 114

      Pages: 419-424

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Observation of Three-dimensional Fermi Surfaces in a Single-component Molecular Metal, [Ni(tmdt)_2]2004

    • Author(s)
      H.Tanaka et al.
    • Journal Title

      J.Am.Chem.Soc. 126

      Pages: 10518-10519

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Single-component Molecular Metals with Extended-TTF Dithiolate Ligands2004

    • Author(s)
      A.Kobayashi et al.
    • Journal Title

      Chem.Rev. 104

      Pages: 5243-5264

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Organic Metals and Superconductors Based on BETS (BETS=bis (ethylenedithio) tetraselenafulvalene)2004

    • Author(s)
      H.Kobayashi et al.
    • Journal Title

      Chem.Rev. 104

      Pages: 5265-5288

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Highly Conducting Crystals Based on Single-Component Gold Complexes with Extended-TTF Dithiolate Ligands2003

    • Author(s)
      W.Suzuki et al.
    • Journal Title

      J. Am. Chem. Soc. 125

      Pages: 1486-1487

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A Novel TTP Donor Containing a PROXYL Radical for Magnetic Molecular Conductors2003

    • Author(s)
      H.Fujiwara er al.
    • Journal Title

      Chem. Lett. 32

      Pages: 482-483

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Structural, electrical, and magnetic properties of a series of molecular conductors based on BDT-TTP and Lanthanoid nitrate complex anions (BDT-TTP = 2,5-bis (1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene)2003

    • Author(s)
      H.Cui et al.
    • Journal Title

      Inorg. Chem. 42

      Pages: 6114-6122

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Structures of a Single-component Palladium Complex with Extended TTF-type Dithiolate Ligands, Bis8tetrathiafulvalenedithiolat)palladium Determined by Powder X-ray Diffraction2003

    • Author(s)
      W.Suzuki et al.
    • Journal Title

      Chem. Lett. 32

      Pages: 1106-1107

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Highly Conducting Crystals Based on Single-Component Gold Complexes with Extended-TTF Dithiolate Ligands2003

    • Author(s)
      W.Suzuki et al.
    • Journal Title

      J.Am.Chem.Soc. 125

      Pages: 1486-1487

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A Novel TTP Donor Containing a PROXYL Radical for Magnetic Molecular Conductors2003

    • Author(s)
      H.Fujiwara et al.
    • Journal Title

      Chem.Lett. 32

      Pages: 482-483

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Structural, electrical, and magnetic properties of a series of molecular conductors based on BDT-TTP and lanthanoid nitrate complex anions (BDT-TTP=2,5-bis (1,3-dithiol-2-ylidene)-1,3,4,6-tetrathiapentalene)2003

    • Author(s)
      H.Cui et al.
    • Journal Title

      Inorg.Chem. 42

      Pages: 6114-6122

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Structures of a Single-component Palladium Complex with Extended TTF-type Dithiolate Ligands, Bis (tetrathiafulvalenedithiolato) palladium Determined by Powder X-ray Diffraction2003

    • Author(s)
      W.Suzuki et al.
    • Journal Title

      Chem.Lett. 32

      Pages: 1106-1107

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Dual-Action Molecular Supercondutors with Magnetic Anions2002

    • Author(s)
      B.Zhang et al.
    • Journal Title

      J. Am. Chem. Soc. 124

      Pages: 9982-9983

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A conducting crystal based on a single-component paramagnetic molecule, [Cu(dmdt)_2] (dmdt = dimethyltetrathiafulualenedithiolate)2002

    • Author(s)
      T.Tanaka et al.
    • Journal Title

      J. Am. Chem. Soc. 124

      Pages: 10002-10003

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Syntheses, structures and physical properties of palladium complexes with an extended-TTF dithiolate ligand, bis (di-n-propylthiotetrathiafulvalenedithiolato) palladate2002

    • Author(s)
      W, Suzuki et al.
    • Journal Title

      Chem. Lett.

      Pages: 936-937

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Magnetic molecular conductors based on BETS molecules and divalent magnetic anions [BETS = bis(ethylenedithio) tetraselenafulvalene]2002

    • Author(s)
      E.Fujiwara et al.
    • Journal Title

      Inorg. Chem. 41

      Pages: 3230-3238

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Magnetism of metallic molecular crystals with rate-earth complex anions bis(di-n-propylthiotetrathiafulvalenedithiolato) palladate2002

    • Author(s)
      T.Otsuka et al.
    • Journal Title

      J. Solid State Chem. 168

      Pages: 444-449

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Dual-Action Molecular Superconductors with Magnetic Anions2002

    • Author(s)
      B.Zhang et al.
    • Journal Title

      J.Am.Chem.Soc. 124

      Pages: 9982-9983

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A conducting crystal based on a single-component paramagnetic molecule, [Cu(dmdt)_2] (dmdt=dimethyltetrathiafulvalenedithiolate)2002

    • Author(s)
      T.Tanaka et al.
    • Journal Title

      J.Am.Chem.Soc. 124

      Pages: 10002-10003

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Syntheses, structures and physical properties of palladium complexes with an extended-TTF dithiolate ligand, bis (di-n-propylthiotetrathiafulvalenedithiolato) palladate2002

    • Author(s)
      W.Suzuki et al.
    • Journal Title

      Chem.Lett. 31

      Pages: 936-937

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Magnetic molecular conductors based on BETS molecules and divalent magnetic anions [BETS=bis (ethylenedithio) tetraselenafulvalene]2002

    • Author(s)
      E.Fujiwara et al.
    • Journal Title

      Inorg.Chem. 41

      Pages: 3230-3238

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Magnetism of metallic molecular crystals with rare-earth complex anions bis(di-n-propylthiotetrathiafulvalenedithiolato)palladate2002

    • Author(s)
      T.Otsuka et al.
    • Journal Title

      J. Solid State Chem. 168

      Pages: 444-449

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2007-12-13  

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