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cond-mat.str-el2026
Van Hove singularity-induced multiple magnetic transitions in multi-orbital systems
Chen Lu, Lun-Hui Hu
Van Hove singularities (VHSs) amplify electronic correlations, providing a crucial platform for discovering novel quantum phase transitions. Here, we show that VHSs in multi-orbita…
cond-mat.str-el2025
Inter-orbital spin-triplet superconductivity from altermagnetic fluctuations
Chen Lu, Chuang Li, Chao Cao +3
Altermagnetic (AM) fluctuations are a new class of collinear spin fluctuations whose role in mediating superconductivity faces a fundamental tension: their -point peak favors in…
cond-mat.str-el2025
Breakdown of Stoner Ferromagnetism by Intrinsic Altermagnetism
Chen Lu, Chao Cao, Huiqiu Yuan +2
The Stoner criterion for ferromagnetism arises from interaction-driven asymmetric filling of spin bands, requiring that the spin susceptibility: (i) peaks dominantly at $\mathbf{Q}…