Summary of group activities in 2013

Theoretical condensed-matter physics
Hideo Aoki, Naoto Tsuji

Our main interests are many-body and topological effects in electron and cold-atom systems, i.e., superconductivity, magnetism and topological phenomena, for which we envisage a materials design for correlated systems and novel non-equilibrium phenomena should be realised. Studies in the 2013 academic year include:

  • Superconductivity
    • High-Tc cuprates: material- and pressure-dependence [1-3]
    • Coexisting electron-electron and electron-phonon interactions
      - Retardation effects, supersolid phases [4]
    • Organic and carbon-based superconductors [1]
    • Fermion and boson systems on flat-band systems [5]
    • Superconductivity induced in non-equilibrium:
  • Topological systems
    • Topological and chiral properties of graphene [6-8]
    • Optical (THz) quantum Hall effect in graphene [9]
    • Graphene quantum dot [10]
  • Non-equilibrium phenomena
    • Non-equilibrium dynamical mean field and dynamical cluster theories[11,12]
    • Dynamical phase transitions in correlated and topological systems
      - Floquet topological insulator
    • Non-thermal fixed points
    • Nonequilibrium quantum spin systems[13]
    • Higgs modes in superconductors in intense laser [11]

[1] Hideo Aoki, J. Superconductivity and Novel Magnetism 25, 1243 (2012).

[2] H. Sakakibara, H. Usui, K. Kuroki, R. Arita and H. Aoki, Phys. Rev. B 85, 064501 (2012) (Editor's Suggestion); H. Sakakibara et al, Phys. Rev. B 86, 134520 (2012).

[3] K. Nishiguchi, K. Kazuhiko, R. Arita, T. Oka, and H. Aoki, arXiv:1212.6320.

[4] Takashi Kambe et al, Phys. Rev. B 86, 214507 (2012) (Editors' Suggestion).

[5] Q. Xin et al, Phys. Rev. Lett. 108, 226401 (2012).

[6] N. Tsuji, T. Oka, H. Aoki and P. Werner, Phys. Rev. B 85, 155124 (2012).

[7] S. Pandey, H. Kontani, D.S. Hirashima, R. Arita and H. Aoki, Phys. Rev. B 86, 060507(R) (2012).

[8] T. Kawarabayashi, Y. Hatsugai, T. Morimoto and H. Aoki, Phys. Rev. B 85, 165410 (2012).

[9] T. Morimoto and H. Aoki, Phys. Rev. B 85, 165445 (2012).

[10] Y. Hatsugai, T. Morimoto, T. Kawarabayashi, Y. Hamamoto and H. Aoki, New J. Phys. 15, 035023 (2013).

[11] R. Shimano, G. Yumoto, J. Y. Yoo, R. Matsunaga, S. Tanabe, H. Hibino, T. Morimoto and H. Aoki, Nature Commun., to be published.

[12] P.A. Maksym and H. Aoki, arXiv:1211.5552.

[13] D. Maryenko, J. Falson, Y. Kozuka, A. Tsukazaki, M. Onoda, H. Aoki and M. Kawasaki, Phys. Rev. Lett. 108, 186803 (2012).

[14] Takashi Koretsune, Ryotaro Arita and Hideo Aoki, Phys. Rev. B 86, 125207 (2012).

[15] Takashi Oka, Phys. Rev. B 86, 075148 (2012).

[16] Shintaro Takayoshi, Hideo Aoki and Takashi Oka, in quantum magnets, arXiv:1302.4460.

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