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Magnetic bound states in SmB 6
Author(s) -
Riseborough Peter S.
Publication year - 2000
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/1521-3889(200010)9:9/10<813::aid-andp813>3.0.co;2-e
Subject(s) - condensed matter physics , physics , inelastic neutron scattering , ferromagnetism , context (archaeology) , inelastic scattering , bound state , semiconductor , spectral line , electronic structure , band gap , strongly correlated material , scattering , atomic physics , nuclear physics , electron , quantum mechanics , paleontology , biology
The heavy fermion semiconductors such as Ce 3 Bi 4 Pt 3 , YbB 12 , and SmB 6 may be modeled as indirect hybridization gap semiconductors. The magnitudes of the gap are smaller than the gaps predicted by local density functional electronic structure calculations, suggesting strong renormalizations due to electronic correlations. The inelastic neutron scattering spectra Im[ χ ( q , ω )] are examined within the context of this model. Anomalously sharp and temperature dependent peaks are seen at energies within the indirect gap in the inelastic neutron scattering experiments on SmB 6 and YbB 12 The in‐gap features are identified as excitations of magnetic bound states, which are induced by residual anti‐ferromagnetic interactions between the renormalized quasi‐particles.