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cond-mat.str-el2005
Orientational symmetry-breaking correlations in square lattice t-J model
Akiharu Miyanaga, Hiroyuki Yamase
We study a tendency to orientational symmetry breaking of the square lattice t-J model by applying the exact diagonalization technique. We introduce a small external anisotropy to…
cond-mat.str-el2005
Mean-field theory for symmetry-breaking Fermi surface deformations on a square lattice
Hiroyuki Yamase, Vadim Oganesyan, Walter Metzner
We analyze a mean-field model of electrons with pure forward scattering interactions on a square lattice which exhibits spontaneous Fermi surface symmetry breaking with a d-wave or…