Ferromagnetism at singular saddle points via divergent quantum metric and Stoner theory in a 2D t2g-orbital model.
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The paper introduces vector-field overlaps from quantum geometry to identify maximal mean-field susceptibilities and correlation lengths for orders in flat bands, with examples of hidden antiferromagnetic nesting and FFLO-like states checked via DQMC.
False vacuum decay in flat-band ferromagnets shows that quantum geometry governs magnetization bubble dynamics in metals and allows dynamical access to chiral edge modes in quantum Hall ferromagnets.
Magnetic instabilities in generic two-orbital systems are governed by the full interplay of the bare susceptibility tensor and spin interaction matrix, not solely by the quantum geometry of a single-channel susceptibility.
citing papers explorer
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Quantum geometric ferromagnetism by singular saddle point
Ferromagnetism at singular saddle points via divergent quantum metric and Stoner theory in a 2D t2g-orbital model.
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Identifying Instabilities with Quantum Geometry in Flat Band Systems
The paper introduces vector-field overlaps from quantum geometry to identify maximal mean-field susceptibilities and correlation lengths for orders in flat bands, with examples of hidden antiferromagnetic nesting and FFLO-like states checked via DQMC.
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False Vacuum Decay in Flat-Band Ferromagnets: Role of Quantum Geometry and Chiral Edge States
False vacuum decay in flat-band ferromagnets shows that quantum geometry governs magnetization bubble dynamics in metals and allows dynamical access to chiral edge modes in quantum Hall ferromagnets.