Find answers to your questions about Matter Modeling or help others by answering their Matter Modeling questions.
Plenty of standard plane-wave codes are able to compute correlation energies on top of DFT solutions using the random-phase approximation (RPA). I was wondering what the typical capabilities are in...
Asked on 08/19/2021 by Michael F. Herbst
1 answerDoes anybody know about an accurate quadrature rule over three Euler angles $theta, phi, chi$?I am trying to calculate the average value of an arbitrary function $f(theta,...
Asked on 08/19/2021 by Emil Zak
1 answerSince the beginning of the century, Wien2K has proven to be a very powerful player in computational condensed matter and materials physics. Wien2K is an all-electron periodic DFT...
Asked on 08/19/2021
4 answerWhen doing VASP calculations for large cells, we get a warning:"You have a (more or less) 'large supercell' and for larger cells itmight be more efficient to use real...
Asked on 08/19/2021
1 answerI am interested in calculating the Fock matrix in the molecular orbital basis with PySCF, though I am not clear on the methodology behind this task.In my attempt, I...
Asked on 08/19/2021 by Wychh
1 answerWe all learned about single vs double vs triple bonds in high school chemistry and biology. We learned that unsaturated fats have double bonds whereas saturated fats have only single...
Asked on 08/19/2021
2 answerStudying magnetic systems, two frequently used approximations are the Heisenberg and Ising models (a discussion about these approximations can be read here): begin{equation}tag{Heisenberg}hat{H}_H=-sum_{langle i jrangle}Jhat{S}_ihat{S}_jend{equation}...
Asked on 08/19/2021
1 answerI am interested in predicting the infrared spectra of bulk phase molecules, it seems that AIMD (ab initio molecular dynamics) is the current best approach. I have found a tutorial...
Asked on 08/19/2021
2 answerIt is understood that finding "the" universal functional is an NP-complete problem. However, progressively better functionals have been constructed decade after decade and fitted to more and more comprehensive datasets....
Asked on 08/19/2021
4 answerToday I tried to get an access to Molden to install it and use for processing the results of my calculations. Unfortunately the ftp seems to be down or is...
Asked on 08/19/2021 by Dmitry Eremin
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