wien2k版本 诚信代理
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关 键 词:wien2k版本
行 业:IT 软件 股票软件
发布时间:2021-02-24
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The linearized augmented plane wave (LAPW) method is among the most accurate methods for performing electronic structure calculations for crystals. It is based on the density functional theory for the treatment of exchange and correlation and uses e.g. the local spin density approximation (LSDA). Several forms of LSDA potentials exist in the literature , but recent improvements using the generalized gradient approximation (GGA) are available too. For valence states relativistic effects can be included either in a scalar relativistic treatment (Koellin
This adaptation is achieved by dividing the unit cell into (I) non-overlapping atomic spheres (centered at the atomic sites) and (II) an interstitial region. In the two types of regions different basis sets are used:
The APW+lo method
Sjöstedt, Nordström and Singh (2000) have shown that the standard LAPW method with the additional constraint on the PWs of matching in value AND slope to the solution inside the sphere is not the most efficient way to linearize Slater's APW method. It can be made much more efficient when one uses the standard APW basis, but of course with ul(r,El) at a fixed energy El in order to keep the linear eigenvalue problem. One then adds a new local orbital (lo) to have enough variational flexibility in the radial basisfunctions:
Wien2k 密度泛函理论计算固体的电子结构软件
Wien2k使用密度泛函理论计算固体的电子结构。它基于键结构计算准确的方案——完全势能(线性)增广平面波((L)APW)+局域轨道(lo)方法。在密度泛函中可以使用局域(自旋)密度近似(LDA)或广义梯度近似(GGA)。它已被近3000个用户组授权,在Google scholar上有大约12000个引用。
Wien2k包含很多Frotran90独立程序,通过C-脚本连接到一起。您不仅可以在任何www-浏览器和w2web界面上运行Wien2k,也可以输入的短命令来运行。
The current version is
WIEN2k_18.2
and was released on 17. July 2019. Version 18.2 is a minor update, while WIEN2k_18.1 was an important update, with new features (3ddens, afmsim, pes, speed-up for non-local der Waals) and fixing some bugs. Upgrading from WIEN2k_17 (or earlier) is highly recommended.
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