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arXiv 1904.09752cond-mat.mes-hall
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范德华二维器件中的能量耗散

Energy dissipation in van der Waals two-dimensional devices

Zhun-Yong Ong, Myung-Ho Bae

摘要:

了解能量耗散的物理基础对于基于二维(2D)材料的设备的有效热管理是必要的,并且需要深入了解此类材料中的热生成和扩散之间的相互作用。我们回顾了在二维材料中,如石墨烯,黑磷和半导体过渡金属二硫属化物的焦耳加热和能量耗散过程的微观机制。我们讨论了非平衡载流子的过程,通过瞬态光激发或在稳态下由大电场产生,经历与晶格和衬底的能量弛豫,我们还讨论了这些能量耗散过程是如何受器件结构的影响。(异质结构,衬底材料包括六方氮化硼等)作为不同衬底的使用,封装,无序,等可以引入或去除改变能量弛豫路径的散射过程。最后,我们讨论了如何在石墨烯为基础的VDW异质结构的独特的载流子散射动力学可以利用光发射和光电探测的光电应用。

英文摘要:

Understanding the physics underlying energy dissipation is necessary for the effective thermal management of devices based on two-dimensional (2D) materials and requires insights into the interplay between heat generation and diffusion in such materials. We review the microscopic mechanisms that govern Joule heating and energy dissipation processes in 2D materials such as graphene, black phosphorus and semiconducting transition metal dichalcogenides. We discuss the processes through which non-equilibrium charge carriers, created either transiently through photoexcitation or at steady state by a large electric field, undergo energy relaxation with the lattice and the substrate We also discuss how these energy dissipation processes are affected by the device configuration (heterostructure, substrate material including hexagonal boron nitride, etc) as the use of different substrates, encapsulation, disorder, etc can introduce or remove scattering processes that change the energy relaxation pathways. Finally, we discuss how the unique carrier scattering dynamics in graphene-based vdW heterostructures can be exploited for optoelectronic applications in light emission and photodetection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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