Ungapped Magnetic Excitations Beyond Hidden Order in URu2-xRexSi2
Nicholas P. Butch, Jose A. Rodriguez, M. Brian Maple
We use inelastic neutron scattering measurements to show that the energy gap in the magnetic excitations of URu2Si2, induced by the Hidden Order transition, is closed by Re substitution. The magnetic excitations remain ungapped in compositions where the specific heat anomaly associated with Hidden Order is no longer observed, which means that the entropy associated with Hidden Order is tied mostly to the magnetic gapping. Further, the onset of ferromagnetic order does not gap the excitations, reflecting the fact that Re substitution does not dramatically affect the Kondo lattice hybridization.
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Ungapped Magnetic Excitations Beyond Hidden Order in URu<sub>2-x</sub>Re<sub>x</sub>Si<sub>2</sub>, Philosophical Magazine, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928887
(Accessed August 9, 2022)