Počet záznamů: 1
Franckeite as an Exfoliable Naturally Occurring Topological Insulator
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SYSNO ASEP 0545685 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Franckeite as an Exfoliable Naturally Occurring Topological Insulator Tvůrce(i) Paz, W. S. (BR)
Menezes, M. G. (BR)
Batista, N. N. (BR)
Sanchez-Santolino, G. (ES)
Velický, Matěj (UFCH-W) ORCID, RID, SAI
Varela, M. (ES)
Capaz, R. B. (BR)
Palacios, J. J. (ES)Zdroj.dok. Nano Letters. - : American Chemical Society - ISSN 1530-6984
Roč. 21, č. 18 (2021), s. 7781-7788Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova 2D material ; first-principles calculations ; franckeite ; natural superlattice ; topological insulator ; transmission electron microscopy Vědní obor RIV CG - Elektrochemie Obor OECD Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) Způsob publikování Omezený přístup Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000700883900048 EID SCOPUS 85114665116 DOI 10.1021/acs.nanolett.1c02742 Anotace Franckeite is a natural superlattice composed of two alternating layers of different composition which has shown potential for optoelectronic applications. In part, the interest in franckeite lies in its layered nature which makes it easy to exfoliate into very thin heterostructures. Not surprisingly, its chemical composition and lattice structure are so complex that franckeite has escaped screening protocols and high-throughput searches of materials with nontrivial topological properties. On the basis of density functional theory calculations, we predict a quantum phase transition originating from stoichiometric changes in one of franckeite composing layers (the quasihexagonal one). While for a large concentration of Sb, franckeite is a sequence of type-II semiconductor heterojunctions, for a large concentration of Sn, these turn into type-III, much alike InAs/GaSb artificial heterojunctions, and franckeite becomes a strong topological insulator. Transmission electron microscopy observations confirm that such a phase transition may actually occur in nature. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2022 Elektronická adresa http://hdl.handle.net/11104/0322358
Počet záznamů: 1