Thermal Conductivity in Biphasic Silicon Nanowires

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-11-08 DOI:10.1021/acs.nanolett.4c03720

Samik Mukherjee, Zhongwei Zhang, Marcin Wajs, Maria Chiara Spadaro, M. Gonzalez-Catala, Uri Givan, Stephan Senz, Jordi Arbiol, Sebastien Francoeur, Sebastian Volz, Oussama Moutanabbir

{"title":"Thermal Conductivity in Biphasic Silicon Nanowires","authors":"Samik Mukherjee, Zhongwei Zhang, Marcin Wajs, Maria Chiara Spadaro, M. Gonzalez-Catala, Uri Givan, Stephan Senz, Jordi Arbiol, Sebastien Francoeur, Sebastian Volz, Oussama Moutanabbir","doi":"10.1021/acs.nanolett.4c03720","DOIUrl":null,"url":null,"abstract":"The work unravels the previously unexplored atomic-scale mechanism involving the interaction of phonons with crystal homointerfaces. Silicon nanowires with engineered isotopic content and crystal phases were chosen for this investigation. Crystal polytypism, manifested by the presence of both diamond cubic and rhombohedral phases within the same nanowire, provided a testbed to study the impact of phase homointerfaces on phonon transport. The lattice thermal conductivity and its temperature response were found to be markedly different in the presence of polytypism. Its origin, however, was not traced to any acoustic mismatch as the polytypic nanowires presented a similar phonon spectrum as their counterparts. Rather, phenomenological modeling and atomistic simulations identified and quantified the role of atomically rough homointerfaces and the subsequent phonon scattering from such homointerfaces in shaping the phonon behavior. This framework provides the inputs necessary to advance the design and modeling of phonon transport in nanoscale semiconductors.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6000,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acs.nanolett.4c03720","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The work unravels the previously unexplored atomic-scale mechanism involving the interaction of phonons with crystal homointerfaces. Silicon nanowires with engineered isotopic content and crystal phases were chosen for this investigation. Crystal polytypism, manifested by the presence of both diamond cubic and rhombohedral phases within the same nanowire, provided a testbed to study the impact of phase homointerfaces on phonon transport. The lattice thermal conductivity and its temperature response were found to be markedly different in the presence of polytypism. Its origin, however, was not traced to any acoustic mismatch as the polytypic nanowires presented a similar phonon spectrum as their counterparts. Rather, phenomenological modeling and atomistic simulations identified and quantified the role of atomically rough homointerfaces and the subsequent phonon scattering from such homointerfaces in shaping the phonon behavior. This framework provides the inputs necessary to advance the design and modeling of phonon transport in nanoscale semiconductors.

Abstract Image

查看原文本刊更多论文

双相硅纳米线的导热性

这项研究揭示了以前未曾探索过的涉及声子与晶体同界面相互作用的原子尺度机制。这项研究选择了具有工程同位素含量和晶体相的硅纳米线。在同一根纳米线中同时存在金刚石立方相和斜方体相的晶体多型性为研究同界面相对声子传输的影响提供了试验平台。研究发现，在存在多型性的情况下，晶格热导率及其温度响应明显不同。然而，由于多型纳米线呈现出与同类纳米线相似的声子谱，因此其根源并不是声子不匹配。相反，现象建模和原子模拟确定并量化了原子粗糙同界面的作用，以及随后从这些同界面产生的声子散射在塑造声子行为中的作用。这一框架为推进纳米级半导体中声子传输的设计和建模提供了必要的输入。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.