191 citations · 1.4k across the 36 of their papers we have counts for
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cond-mat.str-el2013★ 9 cited
BCS-BEC Crossover in the Two-Dimensional Attractive Hubbard Model: Variational Cluster Approach
Tatsuya Kaneko, Yukinori Ohta
We use the variational cluster approximation to study the superconducting ground state in the two-dimensional attractive Hubbard model, putting particular emphasis on the significa…
cond-mat.str-el2013★ 56 cited
Order, criticality and excitations in the extended Falicov-Kimball model
S. Ejima, T. Kaneko, Y. Ohta +1
Using exact numerical techniques we investigate the nature of excitonic (electron-hole) bound states and the development of exciton coherence in the one-dimensional half-filled ext…
cond-mat.str-el2013★ 50 cited
Exact-diagonalization study of exciton condensation in electron bilayers
T. Kaneko, S. Ejima, H. Fehske +1
We report on small-cluster exact-diagonalization calculations which prove the formation of electron-hole pairs (excitons) as prerequisite for spontaneous interlayer phase coherence…