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Article overview
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Single-Dirac-cone Z2 topological insulator phases in distorted Li2AgSb-class and related quantum critical Li-based spin-orbit compounds | | H. Lin
; L.A. Wray
; Y. Xia
; S.-Y. Xu
; S. Jia
; R.J. Cava
; A. Bansil
; M.Z. Hasan
; | | Date: |
7 Apr 2010 | | Abstract: | We have extended our new materials class search for the experimental
realization of Z2 topological insulators from binary [Bi2Se3-class, Xia et.al.,
Nature Phys. 5, 398 (2009)] and the ternary [Half-Heusler class, Lin et.al.,
arXiv:1003.0155v1 (2010); arXiv:1003.2615v1 (2010)] series to non-Heusler
Li-based ternary intermetallic series Li2M’X ($M’$=Cu, Ag, and Au, $X$=Sb and
Bi) with CuHg2Ti-type structure. We discovered that the distorted-Li2AgSb is a
lightweight compound harboring a 3D topological insulator state with Z2=-1
although the groundstate lies near a critical point, whereas the related
Li2CuSb-type compounds are topologically trivial. Non-Heusler ternary Li2M’X
series (with a number of variant compounds) we identified here is a new
platform for deriving novel stoichiometric compounds, artificial
quantum-well/heterostructures, nano-wires, nano-ribbons and nanocrystals. We
have grown some of these bulk materials (experimental results will be reported
separately). | | Source: | arXiv, 1004.0999 | | Services: | Forum | Review | PDF | Favorites | |
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