Cao K, Johnson RD, Giustino F, Radaelli PG, Guo G-C, He L1 July 2014Journal article Journal:Physical Review BVolume:90Issue:2, American Physical Society (APS), p.024402No abstract availableKeywords:34 Chemical Sciences , 51 Physical Sciences , 5104 Condensed Matter Physics DOI10.1103/physrevb.90.024402