1999/11/17 by S. H. Curnoe, S. Curnoe, K. Kikoin +1 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Atomic physics #Chemistry #Condensed matter physics #Conduction band #Doping #Electrical resistivity and conductivity #Electron #Ground state #Impurity #Iron-based superconductors research #Materials science #Physics #Physics of Superconductivity and Magnetism #Polaron #Rare-earth and actinide compounds #Trapping #Valence (chemistry) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.61.15714
published as Phys. Rev. B 61, 15714-15725 (2000) · 12 pages, 3 figures
arxiv created 1999/11/17 · openalex publication_date 2000/06/15 · openalex created_date 2016/06/24 · arxiv updated 2016/08/31 · openalex updated_date 2026/08/05
SmB6 exhibits intermediate valence in the ground state and unusual behavior at low temperatures. The resistivity and the Hall effect cannot be explained either by conventional sf hybridization or by hopping transport in an impurity band. At least three different energy scales determine three temperature regimes of electron transport in this system. We consider the ground-state properties, the soft valence fluctuations, and the spectrum of band carriers in n-doped SmB6. The behavior of excess conduction electrons in the presence of soft valence fluctuations, and the origin of the three energy scales in the spectrum of elementary excitations are discussed. The carriers which determine the low-temperature transport in this system are self-trapped electron-polaron complexes rather than simply electrons in an impurity band. The mechanism of electron trapping is the interaction with soft valence fluctuations.