The magnitude of the magnetic exchange interaction in the heavy fermion antiferromagnet CeRhIn${}_5$

Abstract

We have used high-resolution neutron spectroscopy experiments to determine the complete spin wave spectrum of the heavy fermion antiferromagnet CeRhIn${}_5$. The spin wave dispersion can be quantitatively reproduced with a simple $J_1$-$J_2$ model that also naturally explains the magnetic spin-spiral ground state of CeRhIn${}_5$ and yields a dominant in-plane nearest-neighbor magnetic exchange constant $J_0$ = 0.74 meV. Our results pave the way to a quantitative understanding of the rich low-temperature phase diagram of the prominent Ce$T$In${}_5$ ($T$ = Co, Rh, Ir) class of heavy fermion materials.

arXiv comment7 pages, 3 figures

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• Relaxing Kondo screened Kramers-doublets in CeRhSi${}_3$
• A microscopic Kondo lattice model for the heavy fermion antiferromagnet CeIn${}_3$
• Magnetic structure and Kondo lattice behavior in CeVGe${}_3$: an NMR and neutron scattering study
• Evidence for charge delocalization crossover in the quantum critical superconductor CeRhIn${}_5$
• Magnetic properties of the layered heavy fermion antiferromagnet CePdGa${}_6$
• Anisotropic excitonic magnetism from discrete ${\mathrm{C}}_4$ symmetry in CeRhIn${}_5$
• Emergent ferromagnetic ladder excitations in heavy fermion superconductor CeSb${}_2$
• Realization of the Axial Next-Nearest-Neighbor Ising model in U${}_3$Al${}_2$Ge${}_3$
• Tuning the pressure-induced superconductivity in Pd-substituted CeRhIn5
• Excess heat capacity in magnetically ordered Ce heavy fermion metals
• Magnetic field tuned superconducting and normal phase magnetism in CeCo${}_{0.5}$Rh${}_{0.5}$In${}_5$
• Effects of crystal field and momentum-based frustrated exchange interactions on multiorbital square skyrmion lattice