In-plane thermal conductivity of disordered layered WSe2 and (W)x(WSe2)y superlattice films
It was recently reported that misoriented layered WSe2 and (W)x(WSe2)y films possess extremely low cross-plane thermal conductivity. Here, we report that the in-plane thermal conductivity results for WSe2 and W4(WSe2)10 films measured by using a suspended device are about 30 times higher than the cr...
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Veröffentlicht in: | Applied physics letters 2007-10, Vol.91 (17) |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng ; jpn |
Online-Zugang: | Volltext |
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Zusammenfassung: | It was recently reported that misoriented layered WSe2 and (W)x(WSe2)y films possess extremely low cross-plane thermal conductivity. Here, we report that the in-plane thermal conductivity results for WSe2 and W4(WSe2)10 films measured by using a suspended device are about 30 times higher than the cross-plane values because of the in-plane ordered and cross-plane disordered structures and about six times lower than that of compacted single-crystal WSe2 platelets. The additional W layers in the W4(WSe2)10 films were found to greatly increase the in-plane electrical conductivity relative to the WSe2 films, but reduce the in-plane lattice thermal conductivity assuming the Wiedemann-Franz law. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.2800888 |