期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.166404
关键词
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资金
- NRF [2009-0079947, 2011-0025237]
- KISTI supercomputing center [KSC-2013-C3-010]
- POSTECH BK21Plus Physics Division and Basic Science Research Institute grant, Max-Plank POSTECH/KOREA Research Initiative
- National Research Foundation of Korea [2011-0025237, 2009-0079947] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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