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cond-mat.str-el2026
Avoided Stoner instability at a single ordinary Van Hove point
I. S. Tupitsyn, B. Currie, A. V. Chubukov +3
When the Fermi surface and the Brillouin zone boundary touch at a Van Hove point, mean-field analysis predicts a ferromagnetic (Stoner) instability at finite for any coupl…
cond-mat.str-el2025
Anisotropic scattering rates in strain-tuned SrRuO
Ben Currie, David T. S. Perkins, Evgeny Kozik +2
Motivated by recent angle-resolved photoemission spectroscopy (ARPES) experiments, we analyze the temperature, frequency, and momentum dependence of the single-particle scattering…
cond-mat.str-el2024
Exploiting Parallelism for Fast Feynman Diagrammatics
John Sturt, Evgeny Kozik
Diagrammatic expansions are a paradigmatic and powerful tool of quantum many-body theory. Their evaluation to high order, e.g., by the Diagrammatic Monte Carlo technique, can provi…