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Topological Properties and the Dynamical Crossover from Mixed-Valence to Kondo-Lattice Behavior in the Golden Phase of SmS SCIE SCOPUS

Title
Topological Properties and the Dynamical Crossover from Mixed-Valence to Kondo-Lattice Behavior in the Golden Phase of SmS
Authors
Kang, CJChoi, HCKim, KMin, BI
Date Issued
2015-04-22
Publisher
AMER PHYSICAL SOC
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 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.
Keywords
SEMICONDUCTOR-METAL TRANSITION; HEAVY-FERMION SYSTEMS; HIGH-PRESSURE; INTERMEDIATE-VALENCE; ELECTRONIC-STRUCTURE; SAMARIUM SULFIDE; SMB6; MONOCHALCOGENIDES; STATES; GAP
URI
https://oasis.postech.ac.kr/handle/2014.oak/13229
DOI
10.1103/PHYSREVLETT.114.166404
ISSN
0031-9007
Article Type
Article
Citation
PHYSICAL REVIEW LETTERS, vol. 114, no. 16, 2015-04-22
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