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4 papers · 2 filters
Entropy-Driven Reentrant Behavior in CMR Manganites
Nobuo Furukawa, Yukitoshi Motome, Naoto Nagaosa
We discuss the origin of the reentrant behaviors of insulating states above the Curie temperature of the colossal magnetoresistance manganites. We consider a system where charge or…
An Origin of CMR: Competing Phases and Disorder-Induced Insulator-to-Metal Transition in Manganites
Yukitoshi Motome, Nobuo Furukawa, Naoto Nagaosa
We theoretically explore the mechanism of the colossal magnetoresistance in manganese oxides by explicitly taking into account the phase competition between the double-exchange fer…
Orbital ordering and one-dimensional magnetic correlation in vanadium spinel oxides AV2O4 (A = Zn, Mg, or Cd)
Yukitoshi Motome, Hirokazu Tsunetsugu
We present our theoretical results on the mechanism of two transitions in vanadium spinel oxides VO (=Zn, Mg, or Cd) in which magnetic V cations constitute a geometri…
Orbital and magnetic transitions in geometrically-frustrated vanadium spinels -- Monte Carlo study of an effective spin-orbital-lattice coupled model --
Yukitoshi Motome, Hirokazu Tsunetsugu
We present our theoretical and numerical results on thermodynamic properties and the microscopic mechanism of two successive transitions in vanadium spinel oxides VO ($A…