Size-dependent melting: Numerical calculations of the phonon spectrum
文献类型：期刊论文
| 作者 | Wang, Chuilin; Kang, Kai; Qin, Shaojing ; Kang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
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| 刊名 | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
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| 出版日期 | 2009 |
| 卷号 | 41期号:5页码:817-821 |
| 关键词 | Small Particles Metallic Nanoparticles Nanocrystalline Ni3fe Cohesive Energy Heat-capacities Temperature Thermodynamics Nanoclusters Point |
| ISSN号 | 1386-9477 |
| 英文摘要 | In order to clarify the relationship between the phonon spectra of nanoparticles and their melting temperature, we Studied in detail the size-dependent low energy vibration modes. A minimum model with atoms on a lattice and harmonic potentials for neighboring atoms is used to reveal a general behavior. By calculating the phonon spectra for a series of nanoparticles of two lattice types in different sizes, we found that density of low energy modes increases as the size of nanoparticles decreases, and this density increase causes decrease in melting temperature. And we obtained the linear depression of nanoparticle melting temperature with decreasing size. Size-dependent behavior of the phonon spectra accounts for typical properties of surface-premelting and irregular melting temperature on fine scales. These results show that our microscopic model captures the main physics of nanoparticles. (C) 2009 Elsevier B.V. All rights reserved. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000264967100013 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5370]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Kang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Chuilin,Kang, Kai,Qin, Shaojing,et al. Size-dependent melting: Numerical calculations of the phonon spectrum[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2009,41(5):817-821. |
| APA | Wang, Chuilin,Kang, Kai,Qin, Shaojing,&Kang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China.(2009).Size-dependent melting: Numerical calculations of the phonon spectrum.PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,41(5),817-821. |
| MLA | Wang, Chuilin,et al."Size-dependent melting: Numerical calculations of the phonon spectrum".PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 41.5(2009):817-821. |
入库方式： OAI收割
来源：理论物理研究所
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