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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2013     Display Documents



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ID: 668933.0, MPI für Chemische Physik fester Stoffe / publications 2013
Spin excitons from hybridized heavy quasiparticles in YbB12 and CeB6
Authors:Akbari, A.; Thalmeier, P.
Language:English
Date of Publication (YYYY-MM-DD):2013-05-12
Title of Journal:Journal of the Korean Physical Society
Volume:62
Issue / Number:10
Start Page:1418
End Page:1422
Review Status:not specified
Audience:Not Specified
Abstract / Description:In f-electron compounds the small indirect hybridization gap which is on the scale of the Kondo temperature leads to an enhanced bare spin response around the zone boundary wave vector, Q' = (pi, pi, pi). Due to the interaction of hybridized quasiparticles a collective spin exciton resonance mode may appear within or at the gap threshold around Q'. It was found in the small hybridization gap semiconductor YbB12 as well as in the heavy fermion metal CeB6. There are similarities to the spin excitons observed within the excitation gap of unconventional superconductors. We use an Anderson lattice type model supplemented by the molecular fields of hidden and magnetic order in the case of CeB6 to calculate the RPA spin response in these compounds. It exhibits the salient feature in frequency and momentum dependence around Q' found by inelastic neutron scattering.
External Publication Status:published
Document Type:Article
Communicated by:Ina Werner
Affiliations:MPI für chemische Physik fester Stoffe
Identifiers:ISI:000320122700012 [ID No:1]
ISSN:0374-4884 [ID No:2]
DOI:10.3938/jkps.62.1418
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