北京天演融智软件有限公司
使用期限:*许可形式:单机原产地:奥地利介质:下载适用平台:windows
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It is well known that for localized electrons (like the 4f states in lanthanides or 3d states in some TM-oxides) the LDA (GGA) method is not accurate enough for a proper description. Thus we have implemented various forms of the LDA+U method as well as the ``Orbital polarization method'' (OP) (see Novak 2001 and references therein).
and the charge densities analogously. Thus no shape approximations are made, a procedure frequently called the ``full-potential`` method.
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立程序,通过C-脚本连接到一起。您不仅可以在任何浏览器和w2web界面上运行Wien2k,也可以输入的短命令来运行。
系统要求
The program is written in FORTRAN90 and runs under Unix on practically all platforms (Linux-PCs, IBM RS6000, HP, SGI, COMPAC-alpha, SUNs).
The most efficient platform changes rapidly with time, although we expect that the best price/performance ratio will also in future be some Linux PC based on an Intel architecture (for current benchmark tests click here ). Install the Intel ifort compiler + Intels mkl-libarary (there is a free non-commercial version or the goto-blas .
It requires at least 128 MB memory for small systems (to about 10 atoms per unit cell) or more for larger systems. At present we recommend a multicore CPU with 1-2GB memory / core and twice as much swap space (don't forget to configure the latter!). We have treated systems up to 100 atoms per unit cell on workstations with large memory (1-2 GB) and with more than 1000 atoms/cell on clusters with 64 - 1024 cores and fast network. 1 GB (or 10-1000GB for large cases) of disk space is required.
k-point parallelization is possible and highly efficient on a cluster of PCs (Gbit network is enough), provided a common NFS-file system is available and login (rsh or ssh) is configured properly.
A fine grain parallelization for a single k-point is also available. It requires fast communication (shared memory or fast networks (Infiniband), Gb Ethernet is not really sufficient), MPI, FFTW and Scalapack.
In order to use all options (including the graphical user interface or XCRYSDEN) the following public domain packages must be installed on your system: ghostview (+png support), gnuplot (+png support), acroread (or similar),(Netscape), Perl.
wien2k是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)。WIEN 2000使用全电子方案,包含相对论影响。
X射线结构因子,Baders的“分子中的原子”概念,总能量,力,平衡结构,结构优化,分子动力学,电场梯度,异构移,**精细场,自旋较化(铁磁性和反铁磁性结构),自旋-轨道耦合,X射线发射和吸收谱,电子能量损失谱计算固体的光学特性费米表面LDA,GGA,meta-GGA,LDA+U,轨道较化中心对称和非中心对称晶格,内置230个空间群图形用户界面和用户指南友好的用户环境W2web (WIEN to WEB)可以很*的产生和修改输入文件。它还能帮助用户执行各种任务(如电子密度,态密度,等)。
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