@article{CTT100716423,
  author = {Taro Tatsuno and Joji Nasu and Eriko Mizoguchi and Makoto Naka and Sumio Ishihara},
  title = {Magnetic Field Effects in a Correlated Electron System with Spin-State Degree of Freedom -Implication of an Excitonic Insulator-},
  journal = {Journal of the Physical Society of Japan},
  year = 2016,
}

@article{CTT100716802,
  author = {Joji Nasu and Tsutomu Watanabe and Makoto Naka and Sumio Ishihara},
  title = {Phase diagram and collective excitations in an excitonic insulator from an orbital physics viewpoint},
  journal = {Physical Review B},
  year = 2016,
}

@article{CTT100716806,
  author = {Naoyuki Katayama and Kenta Kimura and Yibo Han and Joji Nasu and Natalia Drichko and Yoshiki Nakanishi and Mario Halim and Yuki Ishiguro and Ryuta Satake and Eiji Nishibori and Masahito Yoshizawa and Takehito Nakano and Yasuo Nozue and Yusuke Wakabayashi and Sumio Ishihara and Masayuki Hagiwara and Hiroshi Sawa and Satoru Nakatsuji},
  title = {Absence of Jahn-Teller transition in the hexagonal Ba3CuSb2O9 single crystal},
  journal = {Proceedings of the National Academy of Sciences},
  year = 2015,
}

@article{CTT100716810,
  author = {Joji Nasu and Sumio Ishihara},
  title = {Resonating valence-bond state in an orbitally degenerate quantum magnet with dynamical Jahn-Teller effect},
  journal = {Physical Review B},
  year = 2015,
}