同位素纯化石墨烯纳米带中声子泊肃叶流的观测
Observation of phonon Poiseuille flow in isotopically-purified graphite ribbons
AI总结：
本研究在5微米宽、13C同位素纯化的悬浮石墨烯纳米带中观测到声子泊肃叶流，并通过第一性原理动力学理论模型验证，为声子流体动力学研究和热操控应用奠定基础。
摘要：
近年来，声子流体动力学的独特集体输运物理激励理论家和实验家在微纳尺度及高温条件下探索这一现象。石墨材料因其固有的强正常散射而被预测能够促进流体动力学热输运。然而，由于实验困难和理论理解的模糊，在石墨系统中观测声子泊肃叶流仍然具有挑战性。在本研究中，基于微尺度实验平台和适用于各向异性固体的相关发生准则，我们展示了在宽度为5微米、具有纯化13C同位素浓度的悬浮石墨烯纳米带中的声子泊肃叶流。我们的观测得到了基于完全第一性原理输入的动力学理论模型的有力支持。因此，本研究为更深入地理解声子流体动力学和前沿热操控应用铺平了道路。
英文摘要：
In recent times, the unique collective transport physics of phonon hydrodynamics motivates theoreticians and experimentalists to explore it in micro- and nanoscale and at elevated temperatures. Graphitic materials have been predicted to facilitate hydrodynamic heat transport with their intrinsically strong normal scattering. However, owing to the experimental difficulties and vague theoretical understanding, the observation of phonon Poiseuille flow in graphitic systems remains challenging. In this study, based on a microscale experimental platform and the pertinent occurrence criterion in anisotropic solids, we demonstrate the phonon Poiseuille flow in a 5 μm-wide suspended graphite ribbon with purified 13C isotope concentration. Our observation is well supported by our theoretical model based on a kinetic theory with fully first-principles inputs. Thus, this study paves the way for deeper insight into phonon hydrodynamics and cutting-edge heat manipulating applications.
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