Kinetic frustration via t' on a square-triangular lattice destabilizes the Nagaoka ferromagnet and drives a quantum phase transition to a spiral spin-density wave that connects to the Haerter-Shastry antiferromagnet.
Nagaoka, Ferromagnetism in a narrow, almost half-filled s band, Physical Review 147, 392 (1966)
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Instability of Nagaoka State and Quantum Phase Transition via Kinetic Frustration Control
Kinetic frustration via t' on a square-triangular lattice destabilizes the Nagaoka ferromagnet and drives a quantum phase transition to a spiral spin-density wave that connects to the Haerter-Shastry antiferromagnet.