通过电子气体膨胀增强非平衡珀尔帖制冷：蒙特卡罗模拟研究

IF 10 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Physics Pub Date : 2024-09-28 DOI:10.1016/j.mtphys.2024.101561

Mona Zebarjadi , Farjana Ferdous Tonni , Kazuaki Yazawa , Ali Shakouri

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引用次数: 0

摘要

我们展示了利用几何收缩在纳米尺度上增强的珀尔帖冷却。这种喷嘴结构导致电子在外加偏压下膨胀，进而产生额外冷却。当电子与晶格失去平衡时，这种额外的冷却会增强整体的珀尔帖效应。利用集合蒙特卡洛模拟演示了使用纳米级梯形几何约束的电子气体的非平衡膨胀。与一维平面几何相比，所提出的装置在稳态条件下运行，提供了更强的冷却能力。我们观察到，梯形几何与普通平面几何相比，最大冷却温度和冷却功率密度都提高了五倍，达到 5 kW/cm2 以上。

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Enhanced non-equilibrium Peltier cooling through electron gas expansion: A Monte Carlo simulation study

We demonstrate enhanced Peltier cooling at the nanoscale using geometrical constriction. This nozzle structure leads to electron expansion under an applied bias, which in turn results in additional cooling. This extra cooling enhances the overall Peltier effect when the electrons are out of equilibrium with the lattice. An ensemble Monte Carlo simulation is used to demonstrate the non-equilibrium expansion of an electron gas using nanoscale trapezoidal geometric confinement. The proposed device operates under steady-state conditions, providing enhanced cooling compared to a one-dimensional flat geometry. We observe a five-fold increase in both the maximum cooling temperature and cooling power density, reaching more than 5 kW/cm², when comparing the trapezoidal geometry to the regular flat geometry.

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来源期刊

Materials Today Physics Materials Science-General Materials Science

CiteScore

14.00

自引率

7.80%

发文量

284

审稿时长

15 days

期刊介绍： Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.