Shigeki FUJIYAMA
Senior Research Scientist		  






March 1996 Department of Physics, The University of Tokyo
March 1998 M. S. Department of Physics, Graduate School of Science, The University of Tokyo
(Supervisor: Prof. Masashi Takigawa)
March 2001 Ph. D, Department of Physics, Graduate School of Science, The University of Tokyo
(Supervisor: Prof. Masashi Takigawa)





April 2001 Research Associate, Institute of Molecular Science, Okazaki
April 2004 Lecturer, Department of Applied Physics, University of Tokyo
April 2008 Research Scientist, Magnetic Materials Laboratory, RIKEN
April 2009 Senior Research Scientist, Magnetic Materials Laboratory, RIKEN
April 2013 Senior Research Scientist, Condensed Molecular Materials Laboratory, RIKEN




  1. S. Fujiyama and R. Kato
    Fragmented Electronic Spins with Quantum Fluctuations in Organic Mott Insulators Near a Quantum Spin Liquid
    Phys. Rev. Lett. 122, 147204 (2019).    New!

  2. S. Fujiyama and R. Kato
    Algebraic Charge Dynamics of the Quantum Spin Liquid β-EtMe3Sb[Pd(dmit)2]2
    Physical Review B, 97, 035131/1-5 (2018).

  3. S. Fujiyama, H. Ohsumi, K. Ohashi, D. Hirai, B. J. Kim, T. Arima, M. Takata, and H. Takagi
    Spin and Orbital Contributions to Magnetically Ordered Moments in 5d Layered Perovskite Sr2IrO4
    Phys. Rev. Lett., 112, 016405/1-016405/5 (2014).

  4. S. Fujiyama, K. Ohashi, H. Ohsumi, K. Sugimoto, T. Takayama, T. Komesu, M. Takata, T. Arima, and H. Takagi
    Weak antiferromagnetism of Jeff=1/2 band in bilayer iridate Sr3Ir2O7
    Phys. Rev. B, 86, 174414 (2012).


  5. S. Fujiyama, H. Ohsumi, T. Komesu, J. Matsuno, B.J. Kim, M. Takata, T. Arima, and H. Takagi
    Two-Dimensional Heisenberg Behavior of Jeff=1/2 Isospins in the Paramagnetic State of the Spin-Orbit Mott Insulator Sr2IrO4
    Phys. Rev. Lett. 108, 247212 (2012).


  6. 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
    Phys. Rev.B rapid. comm. 77 060403(R)(2008).


  7. F. Iwase, K. Miyagawa, S. Fujiyama, K. Kanoda, S. Horiuchi, and Y. Tokura
    Neutral-Ionic phase transition in DMTTF-QCl4 investigated by 35Cl NQR
    J. Phys. Soc. Jpn. 76, 073701 (2007).


  8. S. Fujiyama, M. Takigawa, J. Kikuchi, H-B. Cui, H. Fujiwara, and H. Kobayashi
    Compensation of Local Field in Field-induced Superconductor κ-(BETS)2FeBr4 Observed by 77Se NMR
    Phys. Rev. Lett. 96, 217001 (2006).


  9. S. Fujiyama and T. Nakamura
    Redistribution of Electronic Charges in Spin-Peierls State in (TMTTF)2AsF6 Observed by 13C NMR
    J. Phys. Soc. Jpn. 75, 014705 (7) (2006).


  10. S. Fujiyama, M. Takigawa, J. Kikuchi, K. Kodama, T. Nakamura, E. Fujiwara, and H. Fujiwara, H-B. Cui, and H. Kobayashi
    Nuclear spin-lattice relaxation in κ-(BETS)2FeBr4
    Synth. Met. 154, 253-256 (2005).


  11. S. Fujiyama and T. Nakamura
    13C NMR spectral study of Q1D organic conductor (TMTTF)2AsF6
    J. Phys. IV France, 131, 33-38 (2005).


  12. S. Fujiyama, T. Nakamura
    Charge disproportionation in (TMTTF)2SCN observed by 13C NMR, Phys. Rev. B 70, 045102(6), (2004).


  13. S. Nishihara, T. Akutagawa, T. Hasegawa, Takayoshi Nakamura, S. Fujiyama, Toshikazu Nakamura
    Magnetic and 1H-NMR Spectroscopic Studies of [Ph(NH3)](18-crown-6)[Ni(dmit)2] Having Molecular Spin Ladder Structure
    Synth. Met.137, 1279-1280, (2003).


  14. S. Fujiyama, M. Takigawa, T. Suzuki, N. Yamada, S. Horii, Y. Yamada
    Spin dynamics and antiferromagnetic order in PrBa2Cu4O8 studied by Cu nuclear resonance
    Phys. Rev. B rapid comm. 67, 060404(R)(4)(2003).


  15. S. Fujiyama, T. Nakamura
    NMR investigation of (TMTTF)2Br: charge configurations and spin dynamics
    Synth. Met. 133-134, 67-68, (2003).


  16. S. Fujiyama, M. Takigawa, S. Horii
    Charge Freezing in the Zig-zag Chain Cuprate PrBa2Cu4O8 Observed by Cu Nuclear Quadrupole Resonance
    Phys. Rev. Lett. 90, 147004 (2003).


  17. S. Fujiyama, M. Takigawa, S. Horii, N. Motoyama, H. Eisaki, S. Uchida
    NMR observation of charge fluctuations in quasi-one-dimensional cuprates
    J. Phys. Chem. Solids, 63, 1119-1122, (2002).


  18. S. Fujiyama, T. Nakamura
    NMR study of charge localized states of (TMTTF)2Br
    J. Phys. Chem. Solids, 63, 1259-1261, (2002).


  19. S. Nishihara, T. Akutagawa, T. Hasegawa, S. Fujiyama, Toshikazu Nakamura and Takayoshi Nakamura
    Two Polymorphs of (Alminium)(18-crown-6)[Ni(dmit)2]:Structure and Magnetic Properties
    J. Solid State Chem. 168, 661-667, (2002).


  20. S. Fujiyama, M. Takigawa, N. Motoyama, H. Eisaki, S. Uchida
    Low energy spin excitations in Sr14-xCaxCu24O41
    Physica C, 341-348, 461-462, (2000).


  21. S. Fujiyama, M. Takigawa, N. Motoyama, H. Eisaki, S. Uchida
    Spin Correlations in Hole-Doped Spin Ladder Materials
    J. Phys. Soc. Jpn. 69, 46-53 (2000).


  22. S. Fujiyama, M. Takigawa, N. Motoyama, H. Eisaki, S. Uchida
    Nuclear Spin Relaxation in Hole Doped Two-Leg Ladders
    J. Phys. Soc. Jpn. 69, 1610-1613 (2000).


  23. S. Fujiyama, M. Takigawa, Y. Ueda, T. Suzuki, N. Yamada
    Nuclear spin-spin coupling in La2-xSrxCuO4 studied by stimulated echo decay
    Phys. Rev. B60, 9801-9809 (1999).


  24. S. Fujiyama, Y. Itoh, H. Yasuoka, Y. Ueda
    Anomalous Spin Excitation in the Metallic State of La2-xSrxCuO4 Observed by Cu NQR
    J. Phys. Soc. Jpn. 66, 2864-2869(1997).






International Conference
  1. Physics, Chemistry and Biology of Complex Systems, 2012. 11, Kazan, Russia


  2. New Frontiers of Low Temperature Physics, 2011. 8, Daejeong, Korea


  3. Highly Frustrated Magnetism 2010, 2010. 7, Baltimore, USA


  4. Workshop on Emergent Phenomena of Correlated Materials, 2009. 12, Japan


  5. Joint European Japanese Conference: Frustration in Condensed Matter, 2009. 5. Lyon, France


  6. Workshop on Inelastic Neutron and X-Ray Scattering in Strongly Correlated Electron Systems “Magnetic X-ray scattering of spin-orbital strongly coupled antiferromagnet, Sr2IrO4”, 2008.10 Sendai, invited.


  7. International Workshop on Quantum Critical Phenomena and Novel Phases in Superclean Materials, 2009. 1 Hawaii, USA, invited.


  8. Hong-Kong Forum of Physics, 2008. 12 Hong-Kong, invited.


  9. International Symposium on Crystalline Organic Metals, Superconductors, and Magnetism "Microscopic estimation of antiferromagnetic correlation between pi-electrons and local moments in FISC:κ-(BETS)2FeBr4" 2005.9, USA, invited.


  10. International Workshop on ELECTRONIC CRYSTALS "13C NMR spectral study of quasi-one-dimensional organic conductor (TMTTF)2AsF6", Cargese, France, 2005.8


  11. American Physical Society Meeting, "Redistribution of electronic charges in the spin-Peierls state in (TMTTF)2AsF6 observed by 13C NMR", Los Angeles, California, 2005.3


  12. "Franco-Japanese Meeting on High magnetic Fields", ISSP, Univ. Tokyo "NMR studies of the field-induced superconductivity in organic conductors" 2004. 12, invited.


  13. American Physical Society Meeting"13C NMR study of the charge ordering in Q1D (TMTTF)2SCN", Austin, Texas, 2003.3


  14. China-Japan Joint Symposium on Conduction and Photoconduction in Organic Solids and Related Phenomena, "Charge disproportionation in (TMTTF)2Br" Guangzhou, China, 2001. 11, invited.


  15. ISSP International Symposium, "Correlated Electrons", "NMR observation of charge fluctuations in quasi-one-dimensional cuprates", Kashiwa, Chiba, Japan , 2001. 8, invited.





CMM Member