Personal History


Chief Senior Researcher

Curriculum Vitae

  1. Chief Senior Researcher, 2016.06 – present, Flexible Materials Base Team, Flexible Electronics Research Center (FLEC), National Institute of Advanced Industrial Science and Technology (AIST)
  2. Team Leader, 2015.04 – 2016.05, Flexible Materials Base Team, Flexible Electronics Research Center (FLEC), National Institute of Advanced Industrial Science and Technology (AIST)
  3. Team Leader, 2011.4-2015.3, Flexible Organic Semiconductor Team (FOST), Flexible Electronics Research Center (FLEC), AIST
  4. Senior Researcher, 2008.4-2011.3, Photonics Research Institute, AIST
  5. Researcher, 2003.4-2008.3, Correlated Electron Research Center (CERC), AIST
  6. Research Scientist, 2002.4-2003.3, Correlated Electron Research Center (CERC), AIST
  7. Research Scientist, 1997.4-2002.3, Tokura Research Gr., Joint Research Center for Atom Technology (JRCAT), c/o AIST
  8. Ph D., 1993.4-1997.3, Department of Chemistry, Kyoto University

Research Area

Organic Solid-State Chemistry

Research Achievements

  • Developing π-Molecular Compounds for Conductors, Semiconductors, Ferroelectrics
  • Chemical & Physical Controls for Electronic Phases in Molecular System
  • Developing Supramolecular or Hydrogen-Bonded Crystals for High-performance Ferroelectrics


  1. S.Horiuchi,J.Tsutsumi,K.Kobayashi,R.KUMAI and S.Ishibashi , "Piezoelectricity of Strongly Polarized Ferroelectrics in Prototropic Organic Crystals",J. Mater. Chem. C,6, 4714 - 4719(2018).
  2. Sachio Horiuchi, Kensuke Kobayashi, Reiji Kumai, and Shoji Ishibashi, "Proton tautomerism for strong polarization switching",Nature Commun. 8, 14426-1-9 (2017).
  3. S. Horiuchi, Y. Noda, T. Hasegawa, F. Kagawa, and S. Ishibashi, "Correlated Proton Transfer and Ferroelectricity along Alternating Zwitterionic and Nonzwitterionic Anthranilic Acid Molecules",Chem. Mater. Vol. 27, No. 18, pp 6193–6197(2015).
  4. S.Horiuchi, K.Kobayashi, R.Kumai, N.Minami, F.Kagawa, Y.Tokura, "Quantum Ferroelectricity in Charge-Transfer Complex Crystals", Nature Commun. 6 , 7469-1-7(2015).
  5. K.Kobayashi,S.Horiuchi,S.Ishibashi,F.Kagawa,Y.Murakami,and R.Kumai,"Structure–Property Relationship of Supramolecular Ferroelectric [H-66dmbp][Hca] Accompanied by High Polarization, Competing Structural Phases, and Polymorphs",Chemistry - A European Journal Vol.20 (52),17515–17522.(2014) .
  6. S. Horiuchi, K. Kobayashi, R. Kumai, S. Ishibashi, "Ionic versus Electronic Ferroelectricity on Donor-Acceptor Molecular Sequence",Chem. Lett. (Highlight Review) 43, 26-35(2014).
  7. S. Horiuchi, R. Kumai, Y. Tokura, "High-Temperature and Pressure-Induced Ferroelectricity in Hydrogen-Bonded Supramolecular Crystals of Anilic Acids and 2,3-Di(2-pyridinyl)pyrazine",J. Am. Chem. Soc. 135(11),4492-4500 (2013).
  8. S. Horiuchi, F. Kagawa, K. Hatahara, K. Kobayashi, R. Kumai, Y. Murakami,Y. Tokura, "Above-room-temperature ferroelectricity and antiferroelectricity in benzimidazoles", Nat. Commun. 3:1308 doi: 10.1038/ncomms2322 (2012).
  9. K. Kobayashi, S. Horiuchi, R. Kumai, F. Kagawa, Y. Murakami, Y. Tokura,"Electronic Ferroelectricity in a Molecular Crystal with LargePolarization Directing Antiparallel to Ionic Displacement", Phys. Rev.Lett, 108, (2012) 237601.
  10. R. Kumai, S. Horiuchi, J. Fujioka, and Y. Tokura , "Ferroelectricity and Pressure-Induced Phenomena Driven by Neutral Ionic Valence Instability of Acid-Base Supramolecules", J. Am. Chem. Soc. 134(2), 1036-1046 (2012).
  11. S. Horiuchi, "Ferroelectricity in Organic Molecular Crystals", Mol. Sci. (in Japanese) vol.5, A0041 (2011).
  12. S. Horiuchi, R. Kumai, Y. Tokura, "Hydrogen Bonding Molecular Chains for High-Temperature Ferroelectricity", Adv. Mater. 23, 2098 (2011).
  13. S. Horiuchi, R. Kumai, J. Fujioka, Y. Tokura, "Supramolecular approach to organic ferroelectrics", Physica B, 405, S334 (2010)
  14. S. Horiuchi, Y. Tokura, "Croconic acid: An Above-Room-Temperature Organic Ferroelectric of High Polarization", Kotai Butsuri (in Japanese) 45, No.3 149 (2010).
  15. Sachio Horiuchi, Yusuke Tokunaga, Gianluca Giovannetti, Silvia Picozzi, Hirotake Itoh, Ryo Shimano, Reiji Kumai & Yoshinori Tokura,"Above-room-temperature ferroelectricity in a single-component molecular crystal", Nature 463, 789-792 (11 February 2010).
  16. S. Horiuchi, R. Kumai, Y. Tokura, "Proton-displacive ferroelectricity in neutral cocrystals of anilic acids with phenazine", J. Mater. Chem., 19, 4421-4434 (2009).
  17. S. Horiuchi, R. Kumai, Y. Tokunaga, Y. Tokura, "Proton dynamics and room-temperature ferroelectricity in anilate salts with a proton sponge", J. Am. Chem. Soc., 130, 13382-13391 (2008).
  18. S.Horiuchi and Y.Tokura, “Organic Ferroelectrics”, Nat. Mater., 7, 357-366 (2008) (Review Article).
  19. S.Horiuchi, R.Kumai, and Y.Tokura, “Hydrogen-Bonded Donor-Acceptor Compounds for Organic Ferroelectric Materials”, Chem. Commun., 2321-2329 (2007) (Feature Articles).
  20. S.Horiuchi, R.Kumai, and Y.Tokura, “A Supramolecular Ferroelectric Realized by Collective Proton Transfer”, Angew. Chem. Int. Ed., 46, 3497-3501 (2007).
  21. S.Horiuchi, T.Hasegawa, and Y.Tokura, “Molecular Donor-Acceptor Compounds as Prospective Organic Electronics Materials”, J. Phys. Soc. Jpn. 75, 051016 (2006).
  22. S.Horiuchi, R.Kumai, Y.Okimoto, and Y.Tokura, “Chemical Approach to Neutral-Ionic Valence Instability, Quantum Phase Transition, and Relaxor Ferroelectricity in Organic Charge-Transfer Complexes”, Chem. Phys., 325, 78-91 (2006).
  23. S.Horiuchi, R.Kumai, and Y.Tokura, “Room-Temperature Ferroelectricity and Gigantic Dielectric Susceptibility on a Supramolecular Architecture of Phenazine and Deuterated Chloranilic Acid”, J. Am. Chem. Soc., 127, 5010-5011 (2005).
  24. S.Horiuchi, F.Ishii, R.Kumai, Y.Okimoto, H.Tachibana, N.Nagaosa, and Y.Tokura, “Ferroelectricity near Room-Temperature in Co-crystals of Nonpolar Organic Molecules”, Nat. Mater., 4, 163-166 (2005).
  25. S.Horiuchi, Y.Okimoto, R.Kumai, and Y.Tokura, "Quantum Phase Transition in Organic Charge-Transfer Complexes", Science, 299, 229-232 (2003).
  26. S.Horiuchi, Y.Okimoto, R.Kumai, and Y.Tokura, "Ferroelectric Valence Transition and Phase diagram of a Series of Charge-Transfer Complexes of 4,4'-Dimethyltetrathiafulvalene and Tetrahalo-p-benzoquinone", J. Am. Chem. Soc., 123, 665-670 (2001).
  27. S.Horiuchi, R.Kumai, Y.Okimoto, and Y.Tokura, "Neutral-Ionic Phase Separation and One-Dimensional Ferroelectricity in Organic Relaxors", Phys. Rev. Lett., 85, 5210-5213 (2000).
  28. S.Horiuchi, R.Kumai, Y.Okimoto, and Y.Tokura, "Order-Disorder Transition of Nonplanar Molecules and Dielectric Anomaly in a Crystal of Charge-Transfer Complex", J. Am. Chem. Soc., 121, 6757-6758 (1999).
  29. S.Horiuchi, R.Kumai, and Y.Tokura, "Chemical Control of Ferroelectric Neutral-Ionic Transition in Charge-Transfer Complexes, TTF1-xTSFxQCl4 [TTF = Tetrathiafulvalene; TSF = Tetraselenafulvalene; QCl4 = p-Chloranil]", J. Am. Chem. Soc., 120, 7379-7380 (1998).