207 citations · 2.1k across the 81 of their papers we have counts for
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Quantum paramagnet near spin-state transition
K. Tomiyasu, N. Ito, R. Okazaki +11
Spin-state transition, also known as spin crossover, plays a key role in diverse systems, including minerals and biological materials. In theory, the boundary range between the low…
Double-Exchange Interaction in Optically Induced Nonequilibrium State: A Conversion from Ferromagnetic to Antiferromagnetic Structure
Atsushi Ono, Sumio Ishihara
The double-exchange (DE) interaction, that is, a ferromagnetic (FM) interaction due to a combination of electron motion and the Hund coupling, is a well known source of a wide clas…
Photoinduced charge-order melting dynamics in a one-dimensional interacting Holstein model
Hiroshi Hashimoto, Sumio Ishihara
Transient quantum dynamics in an interacting fermion-phonon system are investigated. In particular, a charge order (CO) melting after a short optical-pulse irradiation and roles of…
Quantum-disordered state of magnetic and electric dipoles in a hydrogen-bonded Mott system
M. Shimozawa, K. Hashimoto, A. Ueda +12
Strongly enhanced quantum fluctuations often lead to a rich variety of quantum-disordered states. A representative case is liquid helium, in which zero-point vibrations of the heli…
Spin and Charge Fluctuations near Metal-Insulator Transition in Dimer-Type Molecular Solid
Naomichi Sato, Tsutomu Watanabe, Makoto Naka +1
Spin and charge fluctuations at vicinity of metal-to-Mott insulator transitions are studied in an organic solid with molecular dimers. The extended Hubbard model taking account of…