Averaged cluster approach to including chemical short-range order in KKR-CPA

Averaged cluster approach to including chemical short-range order in KKR-CPA
复制标题

在 KKR-CPA 中包含化学短程有序的平均聚类方法

DOI:
10.1103/physrevb.102.054207
复制
发表时间:
2020
期刊:
影响因子:
3.7
通讯作者:
Widom, Michael
Widom, Michael
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Raghuraman, Vishnu;Wang, Yang;Widom, Michael

文献摘要

参考文献

相似文献

单格点Korringa-Kohn-Rostoker相干势近似(KKR-CPA)忽略了无序金属体系中存在的短程有序。在本文中,我们建立了一种技术来解决这个缺点,通过嵌入一个平均集群,显示化学短程有序(SRO)。SRO的程度可以通过外部定义的序参量来调节。这个平均的簇可以嵌入在单站点CPA介质或自洽获得的有效介质,包含SRO信息。将该方法应用于两个合金体系--CuZn体心立方(BCC)固溶体和AlCrTiV(一种四元体心立方高熵合金),证明了该方法的有效性。对上述两个系统的非自洽模式和自洽模式进行了比较。我们在互联网上提供代码。计划扩展本文进行了讨论。
The single-site Korringa-Kohn-Rostoker coherent potential approximation (KKR-CPA) ignores short-range ordering present in disordered metallic systems. In this paper, we establish a technique to fix this shortcoming by embedding an averaged cluster that displays chemical short-range order (SRO). The degree of SRO can be tuned by externally defined order parameters. This averaged cluster can be embedded in the single-site CPA medium or a self-consistently obtained effective medium that contains SRO information. The validity of this method is demonstrated by applying it to two alloy systems—the CuZn body-centered cubic (BCC) solid solution, and AlCrTiV, a four-element BCC high entropy alloy. A comparison between the non-self-consistent and self-consistent modes is also provided for the two above-mentioned systems. We make the code available on the internet. Planned extensions to this paper are discussed.
具有有限相关长度的无序系统的状态密度
DOI: 10.1103/physrevb.73.125115
发表时间: 2005
期刊: Physical Review B
影响因子: 3.7
作者:
J. C. Flores;M. Hilke
通讯作者: M. Hilke
DOI: 10.1103/physrevb.29.555
发表时间: 1984
期刊: Physical Review B
影响因子: 3.7
作者:
A. Gonis;G. M. Stocks;W. Butler;H. Winter
通讯作者: H. Winter
DOI: 10.1103/physrevb.4.4390
发表时间: 1971
期刊: Physical Review B
影响因子: 3.7
作者:
G. M. Stocks;R. G. Willams;J. Faulkner
通讯作者: J. Faulkner
Ag-Pd 合金中的电子态
DOI: 10.1088/0305-4608/3/9/011
发表时间: 1973
期刊: Journal of Physics F: Metal Physics
影响因子: --
作者:
G. M. Stocks;R. Williams;J. Faulkner
通讯作者: J. Faulkner
DOI: 10.1103/physrevlett.75.2867
发表时间: 1995-10
影响因子: 8.6
作者:
Yang Wang;G. M. Stocks;W. Shelton;D. Nicholson;Z. Szotek;W. Temmerman
通讯作者: Yang Wang;G. M. Stocks;W. Shelton;D. Nicholson;Z. Szotek;W. Temmerman