Ferromagnetism at singular saddle points via divergent quantum metric and Stoner theory in a 2D t2g-orbital model.
Vanderbilt, Berry phases in electronic structure theory: Elec- tric polarization, orbital magnetization and topological insula- tors, (Cambridge University Press, 2018)
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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.