Pseudogaps and Their Interplay with Magnetic Excitations in the Doped 2D Hubbard Model

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.1122· OSTI ID:528146

Preuss, R; Hanke, W; Groeber, C; Evertz, H G ^[1]

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1. 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

Related Subjects

66 PHYSICS
ANTIFERROMAGNETISM
COMPUTERIZED SIMULATION
DOPED MATERIALS
ELECTRONIC STRUCTURE
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
MONTE CARLO METHOD
PHOTOEMISSION