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首页> 外文期刊>Physica, B. Condensed Matter >Anisotropic thermal transport of 2D quasicrystals of decagonal Al-Ni-Co system
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Anisotropic thermal transport of 2D quasicrystals of decagonal Al-Ni-Co system

机译：十角形Al-Ni-Co体系二维准晶体的各向异性热输运

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摘要

The anisotropic thermal conductivity of 2D quasicrystals of the decagonal Al-Ni-Co system has been measured over a wide range of temperature. The thermal conductivity value along the periodic axis shows the nearly same behavior as the dirty alloy system. The quasiperiodic thermal conductivity exhibits a typical plateau dependence similar to that of the disordered system. The anisotropic behavior of the measured thermal conductivity is discussed on the basis of phonon relaxation time approximation. The main contributions of phonon scattering processes in the periodic and quasiperiodic directions are phonon-electron interaction and point-defect-like scattering effect arising from Penrose tiling, respectively. A small increase above the plateau region in the quasiperiodic transport indicates hopping conduction of localized vibration modes assisted by phonons such as fracton excitations in the disordered system.
机译：已在很宽的温度范围内测量了十边形Al-Ni-Co系统的2D准晶体的各向异性热导率。沿周期轴的热导率值显示出与脏合金系统几乎相同的行为。准周期性热导率表现出与无序系统相似的典型平台依赖性。在声子弛豫时间近似的基础上，讨论了所测量的热导率的各向异性行为。声子在周期和准周期方向上的散射过程的主要贡献分别是由Penrose平铺产生的声子-电子相互作用和类似点缺陷的散射效应。在拟周期性输运过程中，高原区域上方的小幅增加表明局部振动模式的跳跃传导由声子（例如无序系统中的分数子激发）辅助。

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