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Titolo: Strain-driven onset of nontrivial topological insulating states in Zintl Sr2X compounds (X = Pb, Sn)
Autori: 
Data di pubblicazione: 2011
Rivista: 
PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS  
Abstract: We explore the topological behavior of the binary Zintl phase of the alkaline-earth-metal-based compounds Sr2Pb and Sr2Sn using both standard and hybrid density functional theory. It is found that Sr2Pb lies on the verge of a topological instability which can be suitably tuned through the application of a small uniaxial expansion strain (>3%). The resulting nontrivial topologically insulating state displays well-defined metallic states in the Sr2Pb(010) surface, whose evolution is studied as a function of the film thickness.
Handle: http://hdl.handle.net/11584/88359
Tipologia:1.1 Articolo in rivista

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