137 citations · 386 across the 7 of their papers we have counts for
9 papers
Ferromagnetic fluctuation and superconductivity in Na_0.35CoO_2*1.3H_2O: FLEX study of multi-orbital Hubbard model
Masahito Mochizuki, Youichi Yanase, Masao Ogata
Spin and charge fluctuations and superconductivity in Na_0.35CoO_2*1.3H_2O are studied based on a multi-orbital Hubbard model. By applying the fluctuation exchange (FLEX) approxima…
Ferromagnetic and triplet-pairing instabilities controlled by the trigonal distortion of the CoO_6 octahedra in Na_xCoO_2*yH_2O
Masahito Mochizuki, Youichi Yanase, Masao Ogata
In the recently discovered Co-oxide superconductor Na_xCoO_2*yH_2O, the edge-shared CoO6 octahedra are trigonally contracted along the c-axis in the CoO2-plane. We study how this C…
Orbital Physics in the Perovskite Ti Oxides
Masahito Mochizuki, Masatoshi Imada
In the perovskite Ti oxide RTiO3 (R=rare-earth ions), the Ti t2g orbitals and spins in the 3d^1 state couple each other through the strong electron correlations, resulting in a ric…
Ferromagnetic fluctuation and possible triplet superconductivity in Na_xCoO_2*yH_2O: Fluctuation-exchange study of multi-orbital Hubbard model
Masahito Mochizuki, Youichi Yanase, Masao Ogata
Spin and charge fluctuations and superconductivity in a recently discovered superconductor Na_xCoO_2*yH_2O are studied based on a multi-orbital Hubbard model. Tight-binding paramet…
Unconventional superconductivity in NaCoO1.3DO and proximity to a magnetically ordered phase
Y. J. Uemura, P. L. Russo, A. T. Savici +8
Muon spin relaxation (SR) measurements on the new layered cobalt oxide superconductor NaCoO1.3HO and its parent, non-superconducting compounds, have re…
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…