TY - JOUR
T1 - Deformation of Fermi surface due to antiferromagnetic correlation
AU - Morita, K.
AU - Miyake, K.
N1 - Funding Information:
We acknowlege O. Narikiyo for fruitful discussions. One of us (K.M.) is grateful to Y. Okuno and T. Takimoto for their useful comments and advice on the technique of numerical calculation. This work is supported by a Grant-in-Aid for COE Research (10CE2004) of Ministry of Education, Science, Sports and Culture.
PY - 2000/6/1
Y1 - 2000/6/1
N2 - It is investigated, on the basis of the fluctuation exchange approximation, as to how the shape of the Fermi surface is modified in two-dimensional t-t′-U Hubbard model at half-filling as the strength of the onsite Coulomb interaction U is increased. The antiferromagnetic (AF) correlation length is shown to be enhanced as the Coulomb interaction gets closer to the critical value Uc for the onset of AF order. At the same time, the shape of the renormalized Fermi surface is deformed showing the tendency of nesting near Uc.
AB - It is investigated, on the basis of the fluctuation exchange approximation, as to how the shape of the Fermi surface is modified in two-dimensional t-t′-U Hubbard model at half-filling as the strength of the onsite Coulomb interaction U is increased. The antiferromagnetic (AF) correlation length is shown to be enhanced as the Coulomb interaction gets closer to the critical value Uc for the onset of AF order. At the same time, the shape of the renormalized Fermi surface is deformed showing the tendency of nesting near Uc.
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U2 - 10.1016/S0921-4526(99)00913-8
DO - 10.1016/S0921-4526(99)00913-8
M3 - Conference article
AN - SCOPUS:0033885313
VL - 281-282
SP - 812
EP - 813
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
T2 - Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99)
Y2 - 24 August 1999 through 28 August 1999
ER -