Abstract
Frustration and quantum fluctuations are pivotal in stabilizing exotic magnetic phases. Rare-earth triangular-lattice materials serve as ideal platforms for exploring geometrically frustrated magnetism. Thermodynamic and neutron-scattering studies on KErSe₂ crystals reveal long-range stripe order below 0.2 K, with well-defined spin-wave excitations driven by anisotropic spin interactions of Er³⁺ Kramers doublets. These findings elucidate the role of spin-orbit coupling and geometric frustration in shaping magnetic ground states.
In itinerant magnets, the interplay between Kondo-like coupling and frustrated exchange interactions induces complex magnetic orders, impacting band topology and magnetotransport properties, as demonstrated in pyrochlore iridates.
Beyond the SU(2), the large symmetry groups offer a broad theoretical framework for exploring diverse quantum phases and understanding how symmetry and frustration interplay to stabilize unconventional magnetic states. This study highlights the rich landscape of quantum magnetism driven by frustration, symmetry, and electron correlations across diverse systems.
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