Pseudogaps and Their Interplay with Magnetic Excitations in the Doped 2D Hubbard Model
- Institut fuer Theoretische Physik, Am Hubland, D-97074 Wuerzburg (Germany)
On the basis of quantum Monte Carlo simulations of the two-dimensional Hubbard model which cover the doping range from the underdoped to the overdoped regime, we find that the single-particle spectral weight A({rvec k},{omega}) qualitatively reproduces both the momentum (d{sub x{sup 2}{minus}y{sup 2}} symmetry) and doping dependence of the pseudogap as found in photoemission experiments. The drastic doping dependence of the spin response {chi}{sub s}({rvec q},{omega}), which is sharp in both {rvec q}[{approx}({pi},{pi})] and {omega} in the underdoped regime but broad and structureless otherwise, identifies remnants of the antiferromagnetic order as the driving mechanism behind the pseudogap and its evolution with doping. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 528146
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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