Topological Properties and the Dynamical Crossover from Mixed-Valence to Kondo-Lattice Behavior in the Golden Phase of SmS
- Topological Properties and the Dynamical Crossover from Mixed-Valence to Kondo-Lattice Behavior in the Golden Phase of SmS
- Kang, CJ; Choi, HC; Kim, K; Min, BI
- Date Issued
- AMER PHYSICAL SOC
- 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.
- SEMICONDUCTOR-METAL TRANSITION; HEAVY-FERMION SYSTEMS; HIGH-PRESSURE; INTERMEDIATE-VALENCE; ELECTRONIC-STRUCTURE; SAMARIUM SULFIDE; SMB6; MONOCHALCOGENIDES; STATES; GAP
- Article Type
- PHYSICAL REVIEW LETTERS, vol. 114, no. 16, 2015-04-22
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