(color online) (a) Cross-sectional view of GaAs/InAs (zinc blend) and InAs/GaAs (wurtzite) core-shell nanowire. The As, In, and Ga atoms are identified by black, blue, and orange, respectively. (b) Time-averaged temperature profile of the InAs/GaAs core-shell nanowire. (c)–(f) Distribution of heat flux in the cross section of InAs/GaAs core-shell nanowire. (c) is for pure InAs nanowire. (e), (f) are for InAs/GaAs core-shell nanowire with shell thickness of 0.43 nm, 0.86 nm, and 1.29 nm, respectively. Reprinted with permission from Ref. [133]. Copyright (2013) by AIP Publishing LLC.