129 citations · 144 across the 4 of their papers we have counts for
4 papers
Stability of superfluid Fermi gases in optical lattices
Yoshihiro Yunomae, Ippei Danshita, Daisuke Yamamoto +2
Critical velocities of superfluid Fermi gases in optical lattices are theoretically investigated across the BCS-BEC crossover. We calculate the excitation spectra in the presence o…
Band-Selective Filter in a Zigzag Graphene Nanoribbon
Jun Nakabayashi, Daisuke Yamamoto, Susumu Kurihara
Electric transport of a zigzag graphene nanoribbon through a step-like potential or a barrier potential is investigated by using the recursive Green's function method. In the case…
Green's function theory for spin-1/2 ferromagnets with an easy-plane exchange anisotropy
Daisuke Yamamoto, Synge Todo, Susumu Kurihara
The many-body Green's function theory with the random-phase approximation is applied to the study of easy-plane spin-1/2 ferromagnets in an in-plane magnetic field. We demonstrate…
Antiferromagnetism in two-dimensional t-J model: pseudospin representation
Daisuke Yamamoto, Susumu Kurihara
We discuss a pseudospin representation of the two-dimensional t-J model. We introduce pseudospins associated with empty sites, deriving a new representation of the t-J model that c…