Surface Conductivity of the Ytterbium-Doped Topological Kondo-Insulator SmB6

Autor:	M. I. Gilmanov, V. V. Glushkov, N. Yu. Shitsevalova, M. S. Karasev, V. Voronov, V. B. Filipov, Mikhail A. Anisimov, Sergey Demishev
Rok vydání:	2020
Předmět:	Ytterbium Materials science Phonon Kondo insulator Computational Mechanics General Physics and Astronomy chemistry.chemical_element Atmospheric temperature range Conductivity Topology Surface conductivity chemistry Mechanics of Materials Electrical resistivity and conductivity Surface states
Zdroj:	Doklady Physics. 65:233-237
ISSN:	1562-6903 1028-3358
DOI:	10.1134/s1028335820070022
Popis:	The temperature dependence of the conductivity of the topological Kondo-insulator (TKI) Sm1 – xYbxB6 is investigated in the temperature range 2 < T < 300 K for compositions with x ≤ 0.024. It is found that the ytterbium impurity most strongly affects the low-temperature (T < 20 K) electrical conductivity: when changing from x = 0 to x = 0.024, the activation energy of bulk conductivity decreases by 1.8 times from 4 to 2.2 meV, and the 2D surface conductivity increases by six times. The separation made for the contributions to the conductivity enables us to establish that the one-parameter scaling model can be used for describing the conductivity of 2D surface states in the Sm1 – xYbxB6 TKI in which both the interaction with phonons and the electron–electron scattering effects are taken into account.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::955553194166fa6ce73a7c6c88fc2797 https://doi.org/10.1134/s1028335820070022 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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