52 citations · 79 across the 7 of their papers we have counts for
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cond-mat1998★ 4 cited
Ward Identities for Interacting Electronic Systems
H. T. Nieh, Ping Sheng, Xiao-Bing Wang
A Ward-Takahashi identity, as a consequence of gauge invariance and in a form that relates self-energy to the two-particle Bethe-Salpeter scattering kernel, was first derived by Vo…
cond-mat1996
Phase separation in the Hubbard Model
Chi Au, Bao-Heng Zhao, H. T. Nieh
Making use of symmetry properties and known exact results for the Hubbard Model on bipartite lattice, we show that (1) there is no phase separation for repulsive coupling at low do…
cond-mat1994★ 52 cited
Off-Diagonal Long-Range Order: Meissner Effect and Flux Quantization
H. T. Nieh, Gang Su, Bao-Heng Zhao
There has been a proof by Sewell that the hypothesis of off-diagonal long-range order in the reduced density matrix implies the Meissner effect. We present in this note an el…