Mode-resolved transmission functions: an individual Caroli formula.

IF 2.3 4区 物理与天体物理 Q3 PHYSICS, CONDENSED MATTER
Hocine Boumrar, Hand Zenia, Mahdi Hamidi
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引用次数: 0

Abstract

Efficient manipulation of energy at the nanoscale is crucial for advancements in modern computing, energy harvesting, and thermal management. Specifically, controlling quasiparticle currents is critical to these ongoing technological revolutions. This work introduces a novel and physically consistent approach for computing polarization-resolved transmission functions, a crucial element in understanding and controlling energy transport across interfaces. We show that this new method, unlike several previously derived formulations, consistently yields physically meaningful results by addressing the origin of unphysical behavior in other methods. We demonstrate that while multiple decompositions of the transmission function are possible, only there is a unique and unambiguous route to obtaining physically meaningful results. We highlight and critique the arbitrary nature of these alternative decompositions and their associated failures. While developed within the framework of phonon transport, the individual Caroli formula is general and applicable to other fermionic and bosonic quasiparticles, including electrons, and to internal degrees of freedom such as spin and orbital polarization. Through a comparative analysis using a simple model system, we validate the accuracy and reliability of the individual Caroli formula in capturing polarization-specific transmission properties. This new method provides a more accurate understanding of both phonon and electron transport, offering novel ways for optimization of thermoelectric devices and energy-efficient computing technologies.

模式解析传输函数:单个卡罗里公式。
在纳米尺度上有效地操纵能量对于现代计算、能量收集和热管理的进步至关重要。具体来说,控制准粒子电流对这些正在进行的技术革命至关重要。这项工作引入了一种新的、物理上一致的方法来计算 ;偏振分辨透射函数,这是理解和控制跨界面能量传输的关键元素。 ;我们表明,与之前的几种推导公式不同,这种新方法通过解决其他方法中非物理行为的 ;起源,始终产生物理上有意义的结果。我们证明,虽然传输函数的多重分解是可能的,但只有一条独特而明确的途径才能获得物理上有意义的结果。我们强调并批判了这些替代分解及其相关失效的任意性。虽然在声子输运的框架内发展,但单个卡罗里公式是一般的,适用于其他费米子和玻色子准粒子,包括电子,以及内部自由度,如自旋和轨道极化。通过使用一个简单的模型系统进行比较分析,我们验证了单个Caroli公式在捕获偏振特定的传输特性方面的准确性和可靠性。这种新方法提供了对声子和电子传递的更准确的理解,为优化热电器件和节能计算技术提供了新的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Physics: Condensed Matter
Journal of Physics: Condensed Matter 物理-物理:凝聚态物理
CiteScore
5.30
自引率
7.40%
发文量
1288
审稿时长
2.1 months
期刊介绍: Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.
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