Thermal boundary resistance from transient nanocalorimetry: a multiscale modeling approach

Abstract

The Thermal Boundary Resistance at the interface between a nanosized Al film and an Al_{2}O_{3} substrate is investigated at an atomistic level. A room temperature value of 1.4 m^{2}K/GW is found. The thermal dynamics occurring in time-resolved thermo-reflectance experiments is then modelled via macro-physics equations upon insertion of the materials parameters obtained from atomistic simulations. Electrons and phonons non-equilibrium and spatio-temporal temperatures inhomo- geneities are found to persist up to the nanosecond time scale. These results question the validity of the commonly adopted lumped thermal capacitance model in interpreting transient nanocalorimetry experiments. The strategy adopted in the literature to extract the Thermal Boundary Resistance from transient reflectivity traces is revised at the light of the present findings. The results are of relevance beyond the specific system, the physical picture being general and readily extendable to other heterojunctions.

arXiv comment12 pages, 8 figures

References in corpus (14)

• Energy Dissipation and Transport in Nanoscale Devices
• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Nanoscale Heat Transfer: from Computation to Experiment
• A new regime of nanoscale thermal transport: collective diffusion counteracts dissipation inefficiency
• Mechanism of Thermal Conductivity Reduction in Few-Layer Graphene
• Thermal Contact Resistance Across Nanoscale Silicon Dioxide and Silicon Interface
• Cooling dynamics and thermal interface resistance of glass-embedded metal nanoparticles
• Thermo-mechanical behavior of surface acoustic waves in ordered arrays of nanodisks studied by near infrared pump-probe diffraction experiments
• Electron-Phonon Coupling and Thermal Conductance at a Metal-Semiconductor Interface: First-principles Analysis
• Influence of the electron-phonon interfacial conductance on the thermal transport at metal/dielectric interfaces
• Design of a surface acoustic wave mass sensor in the 100 GHz range
• Temperature dependence of the thermal boundary resistivity of glass-embedded metal nanoparticles
• Ab-initio calculation of all-optical time-resolved calorimetry of nanosized systems: Evidence of nanosecond-decoupling of electron and phonon temperatures
• Ultrafast laser pulses to detect and generate fast thermo-mechanical transients in matter

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