Waseda Institute for Advanced Study (WIAS)Waseda University


NAKA, Makoto


NAKA, Makoto


Ph. D in Physics


Assistant Professor



Research Topic

Theoretical study of valence transition and cross-correlation phenomena due to valence skipping elements

Repulsive Coulomb interaction between electrons is a source of important concepts in strongly correlated electron systems such as magnetism and high-Tc superconductivity. On the other hand, in materials including specific elements called “valence skippers”, effective attractive interaction acts between electrons, so that novel physical properties emerge, e.g., colossal negative thermal expansion and magneto-electric effect. My research aims to elucidate a microscopic origin and role of valence skipping nature, and to explore new physical properties and functionality in strongly correlated materials.

Education and Academic Employment

Apr 2017-: Assistant Professor, Waseda Institute for Advanced Studies, Waseda University
Apr 2015-Mar 2017: Assistant Professor, Theoretical Condensed Matter and Statistical Physics Group, Department of Physics, Tohoku University
Apr 2014-Mar 2015: Part-time Lecturer, College of Engineering, Shibaura Institute of Technology
Apr 2013-Mar 2015: Postdoctoral Research Associate, Center for Emergent Matter Science (CEMS), RIKEN
Mar 2013: Ph. D. in Physics, Tohoku University

Fields of Research Interests

condensed matter theory, strongly correlated electron system

Academic Publications
  1. Aya Nagano, Makoto Naka, Joji Nasu, Sumio Ishihara, Theory of Layered Iron Oxide on Frustrated Geometry: Electric Polarization, Magnetoelectric Effect and Orbital State, Phys. Rev. Lett., 99, 217202-1-4 (2007).
  2. Makoto Naka, Aya Nagano, Sumio Ishihara, Magnetodielectric phenomena in a charge- and spin-frustrated system of layered iron oxide, Phys. Rev. B, 77, 224441-1-15 (2008).
  3. Joji Nasu, Aya Nagano, Makoto Naka, Sumio Ishihara, Doubly degenerate orbital system in honeycomb lattice: Implication of orbital state in layered iron oxide, Phys. Rev. B, 78, 024416-1-12 (2008).
  4. Makoto Naka, Sumio Ishihara, Electronic Ferroelectricity in a Dimer Mott Insulator, J. Phys. Soc. Jpn., 79, 063707-1-4 (2010).
  5. Makoto Naka, Sumio Ishihara, Collective Charge Excitation in a Dimer Mott Insulating System, J. Phys. Soc. Jpn., 82, 023701-1-5 (2013).
  6. K. Itoh, H. Itoh, M. Naka, S. Saito, I. Hosako, N. Yoneyama, S. Ishihara, T. Sasaki, and S. Iwai, Collective Excitation of an Electric Dipole on a Molecular Dimer in an Organic Dimer-Mott Insulator, Phys. Rev. Lett., 110, 106401-1-5, (2013).
  7. Makoto Naka and Hitoshi Seo, Long-Period Charge Correlations in Charge-Frustrated Molecular θ-(BEDT-TTF)2X, J. Phys. Soc. Jpn., 83, 053706-1-5 (2014).
  8. Makoto Naka and Sumio Ishihara, Charge Dynamics in a Correlated Fermion System on a Geometrically Frustrated Lattice, J. Phys. Soc. Jpn., 84, 023703-1-4 (2015).
  9. K. Hashimoto, R. Kobayashi, H. Okamura, H. Taniguchi, Y. Ikemoto, T. Morikawa, S. Iguchi, M. Naka, S. Ishihara, and T. Sasaki, Emergence of charge degrees of freedom under high pressure in an organic dimer-Mott insulator β’-(BEDT-TTF)2ICl2, Phys. Rev. B, 92, 085149-1-7 (2015).
  10. Makoto Naka, Hitoshi Seo, and Yukitoshi Motome, Theory of Valence Transition in BiNiO3, Phys. Rev. Lett., 116, 056402-1-5 (2016).
  11. Makoto Naka and Sumio Ishihara, Magnetoelectric effect in organic molecular solids, Sci. Rep., 6, 20781-1-7 (2016).
  12. M. Yoshida, K. Ishii, M. Naka, S. Ishihara, I. Jarrige, K. Ikeuchi, Y. Murakami, K. Kubo, Y. Koike, T. Nagata, Y. Fukuda, N. Ikeda, and J. Mizuki, Observation of momentum-resolved charge fluctuation proximate to the charge-order phase using resonant inelastic x-ray scattering, Sci. Rep., 6, 23611-1-8 (2016).
  13. Makoto Naka and Sumio Ishihara, Quantum melting of magnetic order in an organic dimer Mott-insulating system, Phys. Rev. B, 93, 195114-1-5 (2016).
  14. Joji Nasu, Tsutomu Watanabe, Makoto Naka, and Sumio Ishihara, Phase diagram and collective excitation in excitonic insulator: from the orbital physics viewpoint, Phys. Rev. B, 93, 205816-1-15 (2016).
  15. Taro Tatsuno, Eriko Mizoguchi, Joji Nasu, Makoto Naka, and Sumio Ishihara, Magnetic Field Effect in a Correlated Electron System with Spin-state Degree of Freedom – Implication of an Excitonic Insulator -, J. Phys. Soc. Jpn., 85, 083706-1-5 (2016).
  1. Sumio Ishihara and Makoto Naka, Physical properties of electronic ferroelectric materials, kotai butsuri, AGNE Gijutsu Center, 46, 337-350 (2011).
Other Interests

Affiliated Academic Organizations

The Physical Society of Japan

  1. JPSJ Papers of Editors’ Choice (2010)
  2. 2017 Young Scientist Award of the Physical Society of Japan [Division 7 (Molecular Solids)]

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