Thermal Conductivity of M@C82 [M = Dy, Gd] Thin Films
2017
Mondal, Trisha | Tripathi, Ajay | Zhang, Jinying | Shripathi, Thoudinja | Shinohara, Hisanori | Tiwari, Archana
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.
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