3 papers
cond-mat.str-el2026
Stoner transitions beyond mean-field in two-dimensional electronic systems: a diagrammatic Monte Carlo study
Yueh-Chen Lee, Nikolay V. Prokof'ev, Andrey V. Chubukov
Stoner instabilities for fermions with repulsive interaction have been well studied within the mean-field (ladder) approximation. In this study, we consider two-dimensional electro…
cond-mat.supr-con2024
Pairing at a single Van Hove point
Risto Ojajärvi, Andrey V. Chubukov, Yueh-Chen Lee +2
We show that an interacting electronic system with a single ordinary or extended Van Hove point, which crosses the Fermi energy, is unstable against triplet superconductivity. The…
cond-mat.str-el2024
The Crossover from Ordinary to Higher-Order van Hove Singularity in a Honeycomb System: A Parquet Renormalization Group Analysis
Yueh-Chen Lee, Dmitry V. Chichinadze, Andrey V. Chubukov
We investigate the crossover from an ordinary van Hove singularity (OVHS) to a higher order van Hove singularity (HOVHS) in a model applicable to Bernal bilayer graphene and rhombo…