32 citations · 56 across the 5 of their papers we have counts for
7 papers
Thermodynamic Relations in Correlated Systems
Shinji Watanabe, Masatoshi Imada
Several useful thermodynamic relations are derived for metal-insulator transitions, as generalizations of the Clausius-Clapeyron and Eherenfest theorems. These relations hold in an…
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…
29Si Nuclear-Spin Decoherence Process Directly Observed by Multiple Spin-Echoes for Pure and Carrier-less Silicon
Shinji Watanabe, Susumu Sasaki
We report on the 29Si nuclear spin decoherence time at room temperature for a pure (99.99999%, 7N) and carrier-less (p-type, doping level of 10^15cm-3) silicon in which 29Si nuclei…
New Type of Degenerate Quantum Spin Phase
Masatoshi Imada, Takahiro Mizusaki, Shinji Watanabe
Correlated electrons often crystalize to the Mott insulator usually with some magnetic orders, whereas the "quantum spin liquid" has been a long-sought issue. We report numerical e…
Absence of Translational Symmetry Breaking in Nonmagnetic Insulator Phase on Two-Dimensional Lattice with Geometrical Frustration
Shinji Watanabe, Masatoshi Imada
The ground-state properties of the two-dimensional Hubbard model with nearest-neighbor and next-nearest-neighbor hoppings at half filling are studied by the path-integral-renormali…
Nonmagnetic Insulating States near the Mott Transitions on Lattices with Geometrical Frustration and Implications for -(ET)Cu
Hidekazu Morita, Shinji Watanabe, Masatoshi Imada
We study phase diagrams of the Hubbard model on anisotropic triangular lattices, which also represents a model for -type BEDT-TTF compounds. In contrast with mean-field predicti…