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Showing 2003 · cond-mat.str-elShow all
3 papers · 2 filters
cond-mat.str-el2003★ 32 cited
Precise Determination of Phase Diagram for Two-Dimensional Hubbard Model with Filling- and Bandwidth-Control Mott Transitions: Grand-Canonical Path-Integral Renormalization Group Approach
Shinji Watanabe, Masatoshi Imada
A new numerical algorithm for interacting fermion systems to treat the grand-canonical ensemble is proposed and examined by extending the path-integral renormalization group method…
cond-mat.str-el2003★ 34 cited
G-type antiferromagnetism and orbital ordering due to the crystal field from the rare-earth ions induced by the GdFeO_3-type distortion in RTiO_3 with R=La, Pr, Nd and Sm
Masahito Mochizuki, Masatoshi Imada
The origin of the antiferromagnetic order and puzzling properties of LaTiO_3 as well as the magnetic phase diagram of the perovskite titanates are studied theoretically. We show th…
cond-mat.str-el2003★ 70 cited
Quantum-number projection in the path-integral renormalization group method
Takahiro Mizusaki, Masatoshi Imada
We present a quantum-number projection technique which enables us to exactly treat spin, momentum and other symmetries embedded in the Hubbard model. By combining this projection t…