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 April 25, 2024)
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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
Created June 18, 2015, Updated October 12, 2021