Hiroshi M. YAMAMOTO
Senior Research Scientist		  


March 1993 Bachelor of Science, The University of Tokyo
March 1995 Master of Science, Graduate School of Science, The University of Tokyo
March 1998 Doctor of Science, Graduate School of Science, The University of Tokyo
Doctor thesis "Control of the Arrangement and Electronic Structure of Donor Molecules in the Organic Conductors"


1998 - 1999 Research Associate, Faculty of Science, Gakushuin University
1999 - 2000 Special Postdoctoral Researcher, Condensed Molecular Materials Laboratory, RIKEN
2000 - 2006 Research Scientist, Condensed Molecular Materials Laboratory, RIKEN
2007 to date Senior Research Scientist, Condensed Molecular Materials Laboratory, RIKEN


- Supramolecular nanowire
- Supramolecular bi-functional material
- Organic Mott-FET


  1. H. M. Yamamoto, K. Shigeto, K. Tsukagoshi, I. Yagi, and R. Kato (2004-123757)
    "Element, thin film transistor and sensor using the same, and method of manufacturing element"


  2. H. M. Yamamoto (2004-179175）
    "Single crystal, nanowire metal, electric device, and method of manufacturing nanowire metal"


  3. H. M. Yamamoto, and H. Ito (2006-082199）
    "Swiching Device"



  1. Y. Kawasugi, H. M. Yamamoto, N. Tajima, T. Fukunaga, K. Tsukagoshi and R. Kato
    "Field-Induced Carrier Delocalization in the strain-Induced Mott Insulating state of an Organic Superconductor"
    Physical Review Letters, 103(11), 116801/1-116801/4 (2009).   PRL Editors' Suggestions

  2. T. Itou, A. Oyamada, S. Maegawa, K. Kubo, H.m. Yamamoto and R. Kato
    "Superconductivity on the border of a spin-gapped Mott insulator: NMR studies of the quasi-two-dimensional organic system EtMe3P[Pd(dmit)2]2"
    Physical Review B, 79(17), 174517/1-174517/6 (2009).   PRB Editors' Suggestions

  3. H.M. Yamamoto, M. Hosoda, Y. Kawasugi, K. Tsukagoshi, and R. Kato
    "Field effect on organic charge-ordered/Mott insulators"
    Physica B:condensed Matter, 404(3-4), 413-415 (2009).

  4. F. Nad, P. Monceau, and H.M. Yamamoto
    "Charge-ordered state and its stabilization in organic compounds"
    Physica B:condensed Matter, 404(3-4), 473-475 (2009).

  5. F. Nad, P. Monceau, and H.M. Yamamoto
    "A possible glass-like state in.theta.-(BEDIT-TTF)2CsZn(SCN)4 at low temprature"
    Journal of Physics:Condensed Matter, 20(48), 485211/1-485211-6 (2008).

  6. Y. Kawasugi, H. M. Yamamoto, M. Hosoda, N. Tajima, T. Fukunaga, K. Tsukagoshi, and R. Kato　
    "Strain-induced superconductor/insulator transition and field effect in a thin single crystal of molecular conductor"
    Appl. Phys. Lett., 92, 243508/1-243508/3 (2008).

  7. H. M. Yamamoto, Y. Kawasugi, H. Ito, T. Fukunaga, T. Suzuki, K. Tsukagoshi, R. Kato　
    "Conduction properties of micro-crystals of 2,5-dimethyl-N,N'-dicyanoquinonediimine metal (metal = Ag, Cu) complexes on SiO2/Si substrates"
    Solid State Sci., 10(12),1757-1761 (2008).

  8. T. Yamamoto, H. M. Yamamoto, R. Kato, M. Uruichi, K. Yakushi, H. Akutsu, A. Sato-Akutsu, A. Kawamoto, S. S. Turner, and P. Day　
    "Inhomogeneous site charges at the boundary between the insulating, superconducting, and metallic phases of β"-type bis-ethylenedithio-tetrathiafulvalene molecular charge-transfer salts"
    Phys. Rev. B, 77, 205120/1-205120/14 (2008).   PRB Editors' Suggestions

  9. S. Fujiyama, A. Shitade, K. Kanoda, Y. Kosaka, H. M. Yamamoto, and R. Kato
    "Suppression of electronic susceptibility in metal-Mott-insulator alternating material (Me-3,5-DIP)[Ni(dmit)2]2 observed using 13C NMR"
    Phys. Rev. B, 77, 060403/1-060403/4 (2008).

  10. H. M. Yamamoto, Y. Kosaka, R. Maeda, J. Yamaura, A. Nakao, T. Nakamura, and R. Kato
    "Supramolecular Insulating Networks Sheathing Conducting Nanowires Based on Organic Radical Cations"
    ACS Nano, 2(1), 143-155 (2008).

  11. F. Nad, P. Monceau, and H. M. Yamamoto
    "Effect of cooling rate on charge ordering in θ-(BEDT-TTF)2RbZn(SCN)4"
    Phys. Rev. B, 76(20), 205101/1-205101/6 (2007).

  12. T. Yamamoto, R. Kato, H. M. Yamamoto, A. Fukaya, K. Yamasawa, I. Takahashi, H. Akutsu, A. Akutsu-Sato, and P. Day
    "Technique for anisotropic extension of organic crystals: Application to temperature dependence of electrical resistance"
    Rev. Sci. Instrum., 78, 083906/1-083906/11 (2007).

  13. T. Yamaguchi, T. Konoike, K. Enomoto, M. Nishimura, T. Terashima, S. Uji, and H. M. Yamamoto
    "Large Positive Magnetoresistance of Insulating Organic Crystals in the Non-Ohmic Region"
    Phys. Rev. Lett. 98, 116602/1-116602/4 (2007).

  14. Y. Kosaka, H. M. Yamamoto, A. Nakao, M. Tamura, and R. Kato
    "Coexistence of Conducting and Magnetic Electrons Based on Molecular π-Electrons in the Supramolecular Conductor (Me-3,5-DIP)[Ni(dmit)2]2"
    J. Am. Chem. Soc., 129(11), 3054-3055 (2007).

  15. M. Kimata, Y. Oshima, H. Ohta, K. Koyama, M. Motokawa, H. M. Yamamoto, and R. Kato
    "Low-temperature Fermi surface of the organic conductor β''-(BEDT-TTF)(TCNQ)(1-x)(F1-TCNQ)x (x=0,0.05) from magnetooptical measurements"
    Phys. Rev. B, 75(4), 045126/1-045126/9 (2007).

  16. F. Nad, P. Monceau, and H. M. Yamamoto
    "Dielectric response in the charge-ordered θ-(BEDT-TTF)2RbZn(SCN)4 organic compound"
    J. Phys.: Condensed Matter, 18(41), L509-L514 (2006).

  17. H. M. Yamamoto, H. Ito, M. Ikeda, R. Kato, K. Shigeto, and K. Tsukagoshi
    "Nano-size Molecular Conductors Directly Formed on Silicon Substrates"
    Multifunctional Conducting Molecular Materials, ed. by G. Saito, F. Wudl, R. C. Haddon, K. Tanigaki, T. Enoki, H. E. Katz, and M. Maesato, The Royal Society of Chemistry, Cambridge, UK, 97-100 (2007).

  18. M. Ashizawa, H. M. Yamamoto, A. Nakao, and R. Kato
    "The first methyl antimony linked dimeric tetrathiafulvalene and tetraselenafulvalenes"
    Tetrahedron Letters, 47(50), 8937-8941 (2006).

  19. H. M. Yamamoto, H. Ito, K. Shigeto, I. Yagi, K. Tsukagoshi, and R. Kato
    "Nano-Size Molecular Conductors on Silicon Substrate -Toward Device Integration of Conductive CT Salts-"
    J. Low Temperature Physics, 142(3/4), 215-220 (2006).

  20. M. Ashizawa, A. Nakao, H. M. Yamamoto, and R. Kato
    "Development of the First Methyl Antimony Bridged Tetrachalcogenafulvalene Systems"
    J. Low Temperature Physics, 142(3/4), 449-452 (2006).

  21. K. Kubo, A. Nakao, H. M. Yamamoto, and R. Kato
    "Preparation and Characterization of Conducting Trimetallic Nickel-Dithiolene Complexes with Bridging Tetrathiooxalate Ligands"
    J. Am. Chem. Soc., 128(38), 12358-12359 (2006).

  22. Y. Kosaka, H. M. Yamamoto, A. Nakao, and R. Kato
    "Multicomponent Molecular Conductors with Supramolecular Assemblies Prepared from Neutral Iodine-Bearing pBIB (p-Bis(iodoethynyl)benzene) and Derivatives"
    Bull. Chem. Soc. Jpn., 79(7), 1148-1154, (2006).

  23. T. Yamaguchi, T. Konoike, K. Enomoto, M. Nishimura, T. Terashima, S. Uji, and H. M. Yamamoto
    "Current-Voltage Characteristics of Charge-Ordered Organic Crystals"
    Phys. Rev. Lett., 96(13), 136602/1-136602/4 (2006).

  24. R. Jindo, S. Sugawara, N. Tajima, H. M. Yamamoto, R. Kato, Y. Nishio, and K. Kajita
    "Out-of-plane Resistance of Quasi-two Dimensional Metal (BEDT-TTF)3Cl(DFBIB) in Transverse Magnetic Fields"
    J. Phys. Soc. Jan., 75(1), 013705/1-013705/5 (2006).　　Papers of Editors' Choice

  25. H. M. Yamamoto, H. Ito, K. Shigeto, K. Tsukagoshi, and R. Kato
    "Direct Formation of Micro-/nanocrystalline 2,5-dimethyl-N,N'-dicyanoquinonediimine Complexes on SiO2/Si Substrates and Multiprobe Measurement of Conduction Properties"
    J. Am. Chem. Soc., 128(3), 700-701 (2006).

  26. M. Uruichi, K. Yakushi, H. M. Yamamoto, and R. Kato
    "Infrared and Raman Studies of the Charge-Ordering Phase Transition at 〜170 K in the Quarter-Filled Organic Conductor, β"-(ET)(TCNQ)"
    J. Phys. Soc. Jpn., 75(7), 074720/1-074720/10 (2006).

  27. T. Takahashi, K. Hiraki, S. Moroto, N. Tajima, Y. Takano, Y. Kubo, H. Satsukawa, R. Chiba, H. M Yamamoto, R. Kato, and T. Naito
    "Charge Disproportionation, Everywhere!"
    J. Phys. IV France: Proceedings (2005), 131(ECRYS-2005, International Workshop on Electronic Crystals, 2005), 3-8 (2005).

  28. M. Kimata, H. Ohta, K. Koyama, Y. Oshima, M. Motokawa, H. M. Yamamoto, and R. Kato
    "Development of the High Field Magneto-optical Measurement System with a Rotational Cavity for the Study of Organic Conductors"
    High Magnetic Fields in Semiconductor Physics, Proceedings of the International Conference on High Magnetic Fields in Semiconductor Physics, 16th, Tallahassee, FL, United States, Aug. 2-6, 2004, 355-358 (2005).

  29. T. Takahashi, S. Suzuki, K. Hiraki, H. M. Yamamoto, and R. Kato
    "Electronic Properties of a New Layered Organic Conductor, (BEDT-TTF)3Br(pBIB)"
    Synth. Met., 153(1-3), 401-404 (2005).

  30. M. Kimata, Y. Oshima, K. Koyama, H. Ohta, M. Motokawa, H. M. Yamamoto, and R. Kato
    "Fermi Surface Study of β"-(BEDT-TTF)(TCNQ) by Magnetooptical Measurements"
    Synth. Met., 153(1-3), 369-372 (2005).

  31. S. Yasuzuka, S. Uji, K. Enomoto, T. Konoike, M. Nishimura, T. Terashima, D. Graf, E. S. Choi, J. S. Brooks, H. M. Yamamoto, R. Kato, K. Yokogawa, and K. Keizo
    "Pressure Effect on Fermi Surface in β"-(ET)(TCNQ)"
    Synth. Met., 152(1-3), 437-440 (2005).

  32. Y. Syuma, S. Uji, H. M. Yamamoto, J. Yamaura, C. Terakura, T. Terashima, T. Yakabe, Y. Terai, R. Maeda, and R. Kato
    "Shubnikov-de Haas effect and angular-dependent magnetoresistance in new layered organic conductors ET3Cl(DFBIB) and ET3Br(pBIB)"
    J. Phys. Soc. Jpn., 74(2), 679-685 (2005).

  33. M. Kimata, H. Ohta, K. Koyama, Y. Oshima, M. Motokawa, H. M. Yamamoto, and R. Kato
    "Development of the High field Magneto-optical Measurement System with a Rotational Cavity for the Study of Organic Conductors"
    International Journal of Modern Physics B: Condensed Matter Physics, Statistical Physics, Applied Physics, 18(27, 28 & 29), 3803-3806 (2004).

  34. R. Chiba, K. Hiraki, T. Takahashi, H. M. Yamamoto, and T. Nakamura
    "Extremely Slow Charge Fluctuations in the Metallic State of the Two-Dimensional Molecular Conductor θ -(BEDT-TTF)2RbZn(SCN)4"
    Phys. Rev. Lett., 93(21), 216405/1-216405/4 (2004).

  35. H. Ohta, M. Kimata, Y. Oshima, K. Koyama, M. Motokawa, H. M. Yamamoto, R. Kato, H. Nishikawa, K. Kikuchi, and I. Ikemoto
    "Magnetooptical Measurements of Low Dimensional Organic Conductors"
    Tohoku Daigaku Kinzoku Zairyo Kenkyusho Kyojiba Chodendo Zairyo Kenkyu Senta Nenji Hokoku, Volume Date 2003, 129-132 (2004).

  36. S. Moroto, K. I. Hiraki, Y. Takano, Y. Kubo, T. Takahashi, H. M. Yamamoto, and T. Nakamura
    "Charge Disproportionation in the Metallic State of α -(BEDT-TTF)2I3"
    J. Phys IV France: Proceedings, 114(ISCOM 2003, Fifth International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets, 2003), 339 (2004).

  37. T. Takahashi, R. Chiba, K. Hiraki, H. M. Yamamoto, and T. Nakamura
    "Dynamical Charge Disproportionation in Metallic State in θ -(BEDT-TTF)2RbZn(SCN)4"
    J. Phys IV France: Proceedings, 114(ISCOM 2003, Fifth International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets, 2003), 269-272 (2004).

  38. S. Yasuzuka, D. Graf, E. S. Choi, J. S. Brooks, T. Terashima, T. Konoike, K. Enomoto, M. Nishimura, H. M. Yamamoto, R. Kato, and S. Uji
    "Pressure-induced Fermi Surface Change in Quasi-one-dimensional Conductor β''-(ET)(TCNQ)"
    J. Phys IV France: Proceedings, 114(ISCOM 2003, Fifth International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets, 2003), 157-158 (2004).

  39. M. Kimata, Y. Oshima, H. Ohta, K. Koyama, M. Motokawa, H. M. Yamamoto, and R. Kato
    "Magnetooptical Measurements of β"-(BEDT-TTF)(TCNQ)"
    Physica B: Condensed Matter, 346-347, 382-386 (2004).

  40. K. Yakushi, M. Uruichi, H. Yamamoto, and R. Kato
    "Dynamical fluctuation of the site-charge density in metallic β"-(BEDT-TTF)(TCNQ)"
    J. Phys. IV France, 114, 149-151 (2004).

  41. S. Uji, T. Terashima, S. Yasuzuka, J. Yamaura, H. M. Yamamoto, and R. Kato
    "Fermi Surface and Angular-dependent Magnetoresistance in the Organic Conductor (BEDT-TTF)2Br(DIA)"
    Phys. Rev. B: Condensed Matter and Materials Physics, 68(6), 064420/1-064420/7 (2003).

  42. K. Murata, K. Iwashita, H. M. Yamamoto, H. Yoshino, J. S. Brooks, K. Hiraki, and T. Takahashi
    "Charge Disproportionation and Weak Localization in θ-(BEDT-TTF)2MZn(SCN)4 [M=Cs, Rb]"
    Synth. Met., 135-136, 553-554 (2003).

  43. Y. Kubo, Y. Takano, K. Hiraki, T. Takahashi, H. M. Yamamoto, and T. Nakamura
    "13C-NMR Studies of the 'Narrow Gap Semiconducting' State of α-(BEDT-TTF)2I3 under Pressure"
    Synth. Met., 135-136, 591-592 (2003).

  44. R. Chiba, K. Hiraki, T. Takahashi, H. M. Yamamoto, and T. Nakamura
    "Pressure Effect on the Charge Ordering in θ-(BEDT-TTF)2MZn(SCN)4[M=Rb, Cs]"
    Synth. Met., 135-136, 595-596 (2003).　

  45. S. Yasuzuka, C. Terakura, T. Terashima, T. Yakabe, Y. Terai, H. M. Yamamoto, R. Kato, and S. Uji
    "Fermi surface and resistance anomalies in ET-TCNQ"
    Synth. Met., 135-136, 647-648 (2003).

  46. H. M. Yamamoto, N. Tajima, M. Hagiwara, R. Kato, and J.-I. Yamaura
    "Strange Electric/Magnetic Behaviour of New (BEDT-TTF)(TCNQ)"
    Synth. Met., 135-136, 623-624 (2003).

  47. Y. Oshima, H. Ohta, K. Koyama, M. Motokawa, H. M. Yamamoto, R. Kato, M. Tamura, Y. Nishio, and K. Kajita
    "Fermi Surface Study of Quasi-Two-Dimensional Organic Conductors by Magnetooptical Measurements"
    J. Phys. Soc. Jpn., 72, 143-148 (2003).

  48. Y. Oshima, H. Ohta, K. Koyama, M. Motokawa, H. M. Yamamoto, and R. Kato
    "Observation of High-Order Harmonic Resonances in Magnetooptical Measurement of (BEDT-TTF)2Br(DIA)"
    J. Phys. Soc. Jpn., 71, 1031-1034 (2002).

  49. Y. Oshima, H. Ohta, H. M. Yamamoto, R. Kato, K. Koyama, and M. Motokawa
    "Magnetooptical measurements of BEDT-TTF salts containing supramolecular assemblies"
    Synth. Met., 133-134, 453-454 (2003).

  50. Y. Kubo, Y. Takano, K. Hiraki, T. Takahashi, H. M. Yamamoto, and T. Nakamura
    "The Electronic State of α-(BEDT-TTF)2I3 under Hydrostatic Pressure"
    Synth. Met., 133-134, 307-308 (2003).　

  51. R. Chiba, K. Hiraki, T. Takahashi, H. M. Yamamoto, and T. Nakamura
    "Charge Ordering in θ-(BEDT-TTF)2MZn(SCN)4 [M = Rb, Cs]"
    Synth. Met., 133-134, 305-306 (2003).　

  52. S. Yasuzuka, C. Terakura, T. Terashima, T. Yakabe, Y. Terai, H. M. Yamamoto, J. Yamaura, R. Maeda, R. Kato, and S. Uji
    "Fermi surface in new layered organic conductors (BEDT-TTF)3Br(pBIB) and (BEDT-TTF)3Cl(DFBIB)"
    Synth. Met., 133-134, 169-171 (2003).

  53. K. Iwashita, H. M. Yamamoto, H. Yoshino, D. Graf, K. Storr, I. Rutel, J. S. Brooks, T. Takahashi, and K. Murata
    "Uniaxial Strain Dependence of Electronic States of θ-(BEDT-TTF)2MZn(SCN)4 [M=Cs, Rb]"
    Synth. Met., 133-134, 153-155 (2003).　

  54. H. M. Yamamoto, M. Hagiwara, and R. Kato
    "New phase of (BEDT-TTF)(TCNQ)"
    Synth. Met., 133-134, 449-451 (2003).

  55. H. M. Yamamoto
    "Anionic supramolecular assemblies in conductive cation radical salts: iodine-containing molecules as building blocks"
    RIKEN Review, 46, 3-6 (2002).

  56. Y. Oshima, H. Ohta, H. M. Yamamoto, and R. Kato
    "ESR Studies of BEDT-TTF Organic Conductors Containing Supramolecular Assemblies"
    Proc. 3rd Asia-Pacific EPR/ESR Symposium (APES'01), 2002, 312-315.

  57. R. Kato, T. Imakubo, H. Yamamoto, R. Maeda, M. Fujiwara, J.-I. Yamaura, and H. Sawa
    "An Application of Supramolecular Chemistry to Molecular Conductors"
    Mol. Cryst. Liq. Cryst., 380, 61-68 (2002).

  58. H. M. Yamamoto, R. Maeda, J. Yamaura, and R. Kato
    "Structural and Physical Properties of Conducting Cation Radical Salts Containing Supramolecular Assemblies Based on p-Bis(iodoethynyl)benzene Derivatives"
    J. Mater. Chem., 11, 1034-1041 (2001).

  59. Y. Takano, K. Hiraki, H. M. Yamamoto, T. Nakamura, and T. Takahashi
    "Charge Ordering in α-(BEDT-TTF)2I3"
    Synth. Met., 120, 1081-1082 (2001).

  60. R. Chiba, H. M. Yamamoto, K. Hiraki, T. Takahashi, and T. Nakamura
    "Charge Ordering in q-(BEDT-TTF)2RbZn(SCN)4"
    Synth. Met., 120, 919 (2001).　

  61. H. M. Yamamoto, R. Maeda, J. Yamaura, and R. Kato
    "Multicomponent Molecular Conductors with Supramolecular Assembly : Supramolecules with Various Dimensionality"
    Synth. Met., 120, 781-782 (2001).

  62. R. Chiba, H. M. Yamamoto, K. Hiraki, T. Takahashi, and T. Nakamura
    "Charge disproportionation in (BEDT-TTF)2RbZn(SCN)4"
    J. Phys. Chem. Solids, 62, 389-391 (2001).　

  63. Y. Takano, H. M. Yamamoto, K. Hiraki, T. Nakamura, and T. Takahashi
    "Charge disproportionation in the organic conductor, a-(BEDT-TTF)2I3"
    J. Phys. Chem. Solids, 62, 393-395 (2001).　

  64. H. M. Yamamoto and R. Kato
    "Design, Preparation, and Characterization of Novel ET Salts with Supramolecular Assembly --Sheet and Chain Structures Based on Difluorotetraiodobenzene--"
    Chem. Lett., 2000, 970-971 (2000).

  65. S. Uji, C. Terakura, T. Terashima, H. Aoki, H. M. Yamamoto, J. Yamaura, and R. Kato
    "Fermi Surface of (BEDT-TTF)2Br(DIA)"
    Synth. Met., 103, 1978-1978 (1999).

  66. H. M. Yamamoto, J. Yamaura, and R. Kato
    "Physical Properties of Multi-Component Molecular Conductors with Supramolecular Assembly"
    Synth. Met., 102, 1515-1516 (1999).

  67. H. M. Yamamoto, J. Yamaura, and R. Kato
    "Preparation of Multi-component Molecular Conductors with Supramolecular Assembly"
    Synth. Met., 102, 1448-1451 (1999).

  68. H. M. Yamamoto, J. Yamaura, and R. Kato
    "Multicomponent Molecular Conductors with Supramolecular Assembly: Iondine-Containing Neutral Molecules as Building Blocks"
    J. Am. Chem. Soc., 120(24), 5905-5913 (1998).

  69. H. M. Yamamoto, J. Yamaura, and R. Kato
    "Structural and Electrical Properties of (BEDT-TTF)2X(diiodoacetylene) (X=Cl, Br): The Novel Self-assemby of Neutral Lewis-acidic Molecules and Halide Anions in a Molecular Metal"
    J. Mater. Chem., 8(1), 15-16 (1998).

  70. H. M. Yamamoto, J. Yamaura, and R. Kato
    "Azulene-substituted TTF Derivatives"
    J. Mater. Chem., 8(2), 289-294 (1998).

  71. H. M. Yamamoto, H. Sakurai, and K. Narasaka
    "One-pot Synthesis of Unsymmetrical Ketones by the Reaction of Decacarbonyldimanganese with Two Kinds of Alkyllithiums"
    Bull. Chem. Soc. Jpn., 69, 157 (1996).　

CMM Member