Record Details

Title:
Mechanisms of finite-temperature magnetism in the three-dimensional Hubbard model
Affiliation(s):
EuXFEL staff, Other
Author group:
Theory
Topic:
Scientific area:
Abstract:
We examine the nature of the transition to the antiferromagnetically ordered state in the half-filled three-dimensional Hubbard model using the dual-fermion multiscale approach. Consistent with analytics, in the weak-coupling regime we find that spin-flip excitations across the Fermi surface are important and that the strong-coupling regime is described by Heisenberg physics. In the intermediate-interaction, strong-correlation regime we find aspects of both local and nonlocal correlations. We analyze the critical exponents of the transition in the strong-coupling regime and find them to be consistent with Heisenberg physics down to an interaction of $U/t=10$.
Imprint:
American Physical Society, 2015
Journal Information:
Physical Review B, 92 (14), 144409 (2015)
Related external records:
Language(s):
English
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