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Selected Publication List

• "Robust quantum spin liquid state in the presence of giant magnetic isotope effect in D₃LiIr₂O₆"
  T. Takayama, A. S. Gibbs, K. Kitagawa, Y. Matsumoto, K. Ishii, A. Kato, R. Takano, S. Bette, R. Dinnebier and H. Takagi
  npj Quantum Materials 10, 7 (2025).
  
  
• “Nearly linear orbital molecules on a pyrochlore lattice”
  A. Krajewska, A. N. Yaresko, J. Nuss, S. Bette, A. S. Gibbs, M. Blankenhorn, R. E. Dinnebier, D. P. Sari, I. Watanabe, J. Bertinshaw, H. Gretarsson, K. Ishii, D. Matsumura, T. Tsuji, M. Isobe, B. Keimer, H. Takagi, and T. Takayama
  Sci. Adv. 10, eadn3880 (2024).
  
  
• “Competing spin-orbital singlet states in the 4d⁴ honeycomb ruthenate Ag₃LiRu₂O₆”
  T. Takayama, M. Blankenhorn, J. Bertinshaw, D. Haskel, N. A. Bogdanov, K. Kitagawa, A. N. Yaresko, A. Krajewska, S. Bette, G. McNally, A. S. Gibbs, Y. Matsumoto, D. P. Sari, I. Watanabe, G. Fabbris, W. Bi, T. I. Larkin, K. S. Rabinovich, A. V. Boris, H. Ishii, H. Yamaoka, T. Irifune, R. Bewley, C. J. Ridley, C. L. Bull, R. Dinnebier, B. Kaimer, and H. Takagi
  Phys. Rev. Res. 4, 043079 (2022).
  
  
• “Almost pure J_eff = 1/2 Mott state of In₂Ir₂O₇ in the limit of reduced inter-site hopping”
  A. Krajewska, T. Takayama, R. Dinnebier, A. Yaresko, K. Ishii, M. Isobe, and H. Takagi
  Phys. Rev. B 101, 121101(R) (2020).
  
  
• “Ordering of hidden multipoles in spin-orbit entangled 5d¹ Ta chlorides”
  H. Ishikawa, T. Takayama, R. K. Kremer, J. Nuss, R. Dinnebier, K. Kitagawa, K. Ishii, and H. Takagi
  Phys. Rev. B 100, 045142 (2019).
  
  
• “Long-range magnetic ordering in rocksalt-type high-entropy oxides”
  M. P. Jimenez-Segura, T. Takayama, D. Berardan, M. Reehuis, A. Hoser, H. Takagi, and N. Dragoe
  Appl. Phys. Lett. 114, 122401 (2019).
  
  
• “A spin-orbital-entangled quantum liquid on a honeycomb lattice”
  K. Kitagawa, T. Takayama, Y. Matsumoto, A. Kato, R. Takano, Y. Kishimoto, S. Bette, R. Dinnebier, G. Jackeli, and H. Takagi
  Nature 554, 341 (2018).
  
  
• “Zero-gap semiconductor to excitonic insulator transition in Ta₂NiSe₅”
  Y. F. Lu, H. Kono, T. I. Larkin, A. W. Rost, T. Takayama, A. V. Boris, B. Keimer, and H. Takagi
  Nat. Commun. 8, 14408 (2017).
  
  
• “Hyperhoneycomb iridate β-Li₂IrO₃ as a platform for Kitaev magnetism”
  T. Takayama, A. Kato, R. Dinnebier, J. Nuss, H. Kono, L.S.I. Veiga, G. Fabbris, D. Haskel, and H. Takagi
  Phys. Rev. Lett. 114, 077202 (2015).
  
  

Reviews

• “Spin-orbit-entangled electronic phases in 4d and 5d transition-metal compounds”
  T. Takayama, J. Chaloupka, A. Smerald, G. Khaliullin, and H. Takagi
  J. Phys. Soc. Jpn. 90, 062001 (2021).
  
  
• “Concept and realization of Kitaev quantum spin liquids”
  H. Takagi, T. Takayama, G. Jackeli, G. Khaliullin, and S. E. Nagler
  Nat. Rev. Phys. 1, 264-280 (2019).