What Has Been Achieved: This study provides direct evidence of the competing effects of free electrons on thermal conductivity
and discloses that free electrons could lead to a net negative contribution to the thermal conductivity of NbSe3.
Importance of the Achievement: It provide insights into the roles that free electrons plays in thermal transport and should have broad implications in thermal engineering.
Unique Feature(s) of the MIP that Enabled this Achievement: 2DCC-MIP’s bulk growth of high-quality NbSe3 single crystals.
(If Applicable) Publication: Pan, Z., Yang, L., Tao, Y., Zhu, Y., Xu, Y.-Q., Mao, Z. & Li, D. Net negative contributions of free electrons to the thermal conductivity of NbSe3 nanowires. Physical Chemistry Chemical Physics 22, 21131-21138 (2020). https://doi.org/10.1039/D0CP03484C.
The authors thank the financial support from the U.S. National Science foundation (CBET-1805924 and DMR-1532107). Y. T. acknowledges financial support from the China Scholarship Council (CSC, 201806090027). This work was performed in part at Cornell NanoScale Facility, an NNCI member supported by NSF Grant NNCI-1542081. Support for crystal growth and characterization was provided by the National Science Foundation through the Penn State 2D Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under NSF cooperative agreement DMR-1539916. Z. Q. M. acknowledges the support of NSF-DMR-1917579.