论文标题
Anharmonic量子热传输穿过范德华界面
Anharmonic quantum thermal transport across a van der Waals interface
论文作者
论文摘要
我们通过开发基于量子力学的理论来研究弱相互作用界面跨越弱相互作用的界面的散射。我们发现，非谐波三音散射到界面热电导的贡献可以施加到Landauer公式中，而透射功能依赖于温度。令人惊讶的是，在弱耦合极限中，由于温度升高而导致的肛门声子散射引起的传输是无界的，这在两声过程中在物理上是不可能的。我们进一步揭示，即使在室温下，也可以在谐波过程中占主导地位的真实异质界面（例如，在石墨烯和单层钼之间）的非谐作用，突显了非谐性在弱相互作用的异质系统中的重要作用。
We investigate the anharmonic phonon scattering across a weakly interacting interface by developing a quantum mechanics-based theory. We find that the contribution from anharmonic three-phonon scatterings to interfacial thermal conductance can be cast into Landauer formula with transmission function being temperature-dependent. Surprisingly, in the weak coupling limit, the transmission due to anharmonic phonon scattering is unbounded with increasing temperature, which is physically impossible for two-phonon processes. We further reveal that the anharmonic contribution in a real heterogeneous interface (e.g., between graphene and monolayer molybdenum disulfide) can dominate over the harmonic process even at room temperature, highlighting the important role of anharmonicity in weakly interacting heterogeneous systems.
