2014/12/26 by Chang‐Jong Kang, Chang-Jong Kang, Hong Chul Choi +2 · 1 citation
Materials Science · Physics and Astronomy · #Band gap #Condensed matter physics #Electrical resistivity and conductivity #Electron #Fermi level #Fermi surface #Geometric phase #Iron-based superconductors research #Kondo effect #Kondo insulator #Physics #Pseudogap #Quantum mechanics #Rare-earth and actinide compounds #Semimetal #Superconductivity #Surface (topology) #Surface states #Topological Materials and Phenomena #Topology (electrical circuits) #Valence (chemistry) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.114.166404
published as Phys. Rev. Lett. 114, 166404 (2015) · 5 + 5 pages, 3 + 4 figures
arxiv created 2014/12/26 · openalex publication_date 2015/04/22 · arxiv updated 2015/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have investigated temperature-dependent behaviors of electronic structure and resistivity in a mixed-valent golden phase of SmS, based on the dynamical mean-field-theory band-structure calculations. Upon cooling, the coherent Sm 4f bands are formed to produce the hybridization-induced pseudogap near the Fermi level, and accordingly the topology of the Fermi surface is changed to exhibit a Lifshitz-like transition. The surface states emerging in the bulk gap region are found to be not topologically protected states but just typical Rashba spin-polarized states, indicating that SmS is not a topological Kondo semimetal. From the analysis of anomalous resistivity behavior in SmS, we have identified universal energy scales, which characterize the Kondo-mixed-valent semimetallic systems.