Stock, C.
, Rodriguez Rivera, J.
, Schmalzl, K.
, Rodriguez, E.
, Stunault, A.
and Petrovic, C.
(2015),
Single to Multiquasiparticle Excitations in the Itinerant Helical Magnet CeRhIn<sub>5</sub>, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=918516
(Accessed October 10, 2025)
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Single to Multiquasiparticle Excitations in the Itinerant Helical Magnet CeRhIn5
Published
Author(s)
C. Stock, , Karin Schmalzl, E. E. Rodriguez, A. Stunault, C. Petrovic
Abstract
CeRhIn5 is an itinerant magnet where the Ce3+ spins order in a simple spiral phase caused by competing exchange interactions. We investigate the spin excitations and observe sharp spin- waves parameterized by a nearest neighbor exchange JRKKY =0.88 ±0.05 meV. At higher energies, the spin fluctuations are heavily damped where single quasiparticle states decay into a continuum constrained by kinematics of energy and momentum conservation. CeRhIn5 represents a case where competing interactions results in a breakdown of a single quasiparticle picture for the excitations.Citation
Physical Review Letters
Volume
114
Issue
24
Pub Type
Journals
Download Paper
Keywords
Neutron Scattering, Heavy fermions, magnetic materials
Citation
Issues
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Created June 18, 2015, Updated October 12, 2021