Magnitude of the magnetic exchange interaction in the heavy-fermion antiferromagnet cerhin5

Pinaki Das, S. Z. Lin, N. J. Ghimire, K. Huang, F. Ronning, E. D. Bauer, J. D. Thompson, C. D. Batista, G. Ehlers, M. Janoschek

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35 Scopus citations

Abstract

We have used high-resolution neutron spectroscopy experiments to determine the complete spin wave spectrum of the heavy-fermion antiferromagnet CeRhIn5. The spin wave dispersion can be quantitatively reproduced with a simple frustrated J1-J2 model that also naturally explains the magnetic spin-spiral ground state of CeRhIn5 and yields a dominant in-plane nearest-neighbor magnetic exchange constant J0=0.74(3)meV. Our results pave the way to a quantitative understanding of the rich low-temperature phase diagram of the prominent CeTIn5 (T=Co, Rh, Ir) class of heavy-fermion materials.

Original languageEnglish
Article number246403
JournalPhysical Review Letters
Volume113
Issue number24
DOIs
StatePublished - Dec 8 2014

Funding

FundersFunder number
U.S. Department of Energy

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