Thermal Conductivity of M@C82 [M = Dy, Gd] Thin Films

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• 作者：Trisha Mondal ; Ajay Tripathi ; Jinying Zhang ; Thoudinja Shripathi ; Hisanori Shinohara ; Archana Tiwari
• 刊名：Journal of Physical Chemistry C
• 出版年：2017
• 出版时间：February 16, 2017
• 年：2017
• 卷：121
• 期：6
• 页码：3642-3647
• 全文大小：464K
• ISSN：1932-7455

文摘

Temperature dependent Raman spectra of a Dy@C₈₂ thin film are investigated between 80 and 300 K. The first order temperature coefficient is evaluated for both Dy–C and C–C vibrational modes which reveals the presence of thermal and anharmonic contributions to the phonon hardening at low temperatures. The Dy–C mode broadens while decreasing the temperature revealing that the electron–phonon coupling is dominant over phonon–phonon coupling at low temperatures. In addition, laser-power dependent Raman spectra of Dy@C₈₂ and Gd@C₈₂ have been analyzed for estimating their first order power coefficients and the thermal conductivities.