TY - JOUR
T1 - Charge Gap, Charge Susceptibility and Spin Correlation in the Hubbard Model on a Square Lattice
AU - Furukawa, Nobuo
AU - Imada, Masatoshi
PY - 1991/11
Y1 - 1991/11
N2 - Quantum Monte Carlo study of the Hubbard model on a square lattice in the ground state is reported. For the on-site interaction U=4 scaled by the transfer, the charge excitation gap at the half-filling is estimated to be δ, = 0.58±0.08. Near half-filling, the charge compressibility k follows the form k∝ δ-1 for the doping concentration δ, indicating a divergent behavior as the system approaches half-filling, while k = 0 at the half-filling. The incommensurate spin correlation length ∊ scales as [formula omitted].
AB - Quantum Monte Carlo study of the Hubbard model on a square lattice in the ground state is reported. For the on-site interaction U=4 scaled by the transfer, the charge excitation gap at the half-filling is estimated to be δ, = 0.58±0.08. Near half-filling, the charge compressibility k follows the form k∝ δ-1 for the doping concentration δ, indicating a divergent behavior as the system approaches half-filling, while k = 0 at the half-filling. The incommensurate spin correlation length ∊ scales as [formula omitted].
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U2 - 10.1143/JPSJ.60.3604
DO - 10.1143/JPSJ.60.3604
M3 - Article
AN - SCOPUS:0000756644
SN - 0031-9015
VL - 60
SP - 3604
EP - 3607
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 11
ER -