Topological properties and the dynamical crossover from mixed-valence to Kondo-lattice behavior in golden phase of SmS

Abstract

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 4$f$ bands are formed to produce the hybridization induced pseudogap near the Fermi level, and accordingly the topology of 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.

5 + 5 pages, 3 + 4 figures

References in corpus (5)

• Quantum Criticality in Heavy Fermion Metals
• Universal Behavior in Heavy Electron Materials
• Termination-dependent Surface In-gap States in a Mixed-valent Topological Insulator: SmB${}_6$
• Conserving approximations in direct perturbation theory: new semianalytical impurity solvers and their application to general lattice problems
• Excitonic Instability in the Transition from the Black Phase to the Golden Phase of SmS under Pressure Investigated by Infrared Spectroscopy

Cited by in corpus (4)

• Interplay of Valence and Semimetal-to-Insulator Transitions in SmS
• Hard and soft x-ray photoemission spectroscopy study of the new Kondo system SmO thin film
• Large ferromagnetic-like band splitting in ultrathin ${\mathrm{SmC}}_6$ films
• Anomalous 4$f$ fine structure in TmSe${}_{1-x}$Te${}_x$ across the metal-insulator transition