Abstract：
:The group-IV tin has been hypothesized to possess intriguing electronic properties in an atom-thick hexagonal form. An attractive pathway of producing sizable 2D crystallites of tin is based on deintercalation of bulk compounds with suitable tin frameworks. Here, we have identified a new synthesizable metal distannide, NaSn2, with a 3D stacking of flat hexagonal layers and examined a known compound, BaSn2, with buckled hexagonal layers. Our ab initio results illustrate that despite being an exception to the 8-electron rule, NaSn2 should form under pressures easily achievable in multi-anvil cells and remain (meta)stable under ambient conditions. Based on calculated Z2 invariants, the predicted NaSn2 may display topologically non-trivial behavior and the known BaSn2 could be a strong topological insulator.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Shao J,Beaufils C,Kolmogorov ANdoi
10.1038/srep28369subject
Has Abstractpub_date
2016-07-08 00:00:00pages
28369issn
2045-2322pii
srep28369journal_volume
6pub_type
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