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Existence of a novel metallic ferromagnetic phase in models for undoped manganites
Takashi Hotta
The existence of a novel metal-insulator transition in the ferromagnetic state of models for undoped manganites is here discussed using numerical techniques applied to the $e_{\rm…
Superconductivity in the Orbital Degenerate Model for Heavy Fermion Systems
Tetsuya Takimoto, Takashi Hotta, Kazuo Ueda
Magnetism and superconductivity of new heavy fermion compounds CeTIn (T=Co, Rh and Ir) are investigated by applying fluctuation exchange approximation to an orbital degenerate…
Theory of Manganites
Takashi Hotta, Elbio Dagotto
In this review, the present status of theories for manganites is discussed. The complex phase diagrams of these materials, with a variety of spin-charge-orbital ordering tendencies…
Electronic Structure and Fermiology of PuCoGa
Takahiro Maehira, Takashi Hotta, Kazuo Ueda +1
By using a relativistic linear augmented-plane-wave method, we clarify energy band structures and Fermi surfaces of recently discovered plutonium-based superconductor PuCoGa. W…
Construction of microscopic model for f-electron systems on the basis of j-j coupling scheme
Takashi Hotta, Kazuo Ueda
We construct a microscopic model for f-electron systems, composed of f-electron hopping, Coulomb interaction, and crystalline electric field (CEF) terms. In order to clarify the me…
Unveiling New Magnetic Phases of Undoped and Doped Manganites
Takashi Hotta, Mohammad Moraghebi, Adrian Feiguin +3
Novel ground-state spin structures in undoped and lightly-doped manganites are here investigated based on the orbital-degenerate double-exchange model, by using mean-field and nume…