Theory of the Electron Spin Resonance in the Heavy Fermion Metal β-YbAlB4

Abstract

The heavy fermion metal β-YbAlB4 exhibits a bulk room temperature conduction electron ESR signal which evolves into an Ising-anisotropic f-electron signal exhibiting hyperfine features at low temperatures. We develop a theory for this phenomenon based on the development of resonant scattering off a periodic array of Kondo centers. We show that the hyperfine structure arises from the scattering off the Yb atoms with non zero nuclear spin, while the constancy of the ESR intensity is a consequence of the presence of CEF excitations of the order of the hybridization strength.

References in corpus (9)

• Quantum Criticality in Heavy Fermion Metals
• Heavy Fermions and Quantum Phase Transitions
• Quantum critical state in a magnetic quasicrystal
• Quantum Criticality without Tuning in the Mixed Valence Compound beta-YbAlB4
• Relevance of ferromagnetic correlations for the Electron Spin Resonance in Kondo lattice systems
• Layered Kondo lattice model for quantum critical beta-YbAlB4
• Electron spin resonance in Kondo systems
• β-YbAlB4: a critical nodal metal
• The Role of Crystal Symmetry in the Magnetic Instabilities of $\beta$-YbAlB${}_4$ and $\alpha$-YbAlB${}_4$

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• Kondo-lattice-mediated interactions in flat band systems
• Nature of the unconventional heavy fermion Kondo state in monolayer CeSiI
• Charge Transfer Effect under Odd-Parity Crystalline Electric Field: Divergence of Magnetic Toroidal Fluctuation in $\beta$-YbAlB${}_4$
• Strong in-plane anisotropy in the electronic structure of fixed-valence $\beta$-LuAlB${}_4$
• Quantum Valence Criticality in Heavy Fermions on Periodic and Aperiodic Crystals