Questions tagged [software]

For questions about matter modeling software. Questions can be about usage or recommendations.

10 questions with no upvoted or accepted answers
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17
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170 views

What are the tools available for point defects calculations?

As far as I know, there are mainly PyCDT, PyDEF, pylada and some part of pymatgen. As a new user to those tools, which one would be a good choice? It would be appreciated if you could explain one of ...
13
votes
0answers
116 views

Empirically determining thermostat damping factor

Is there a way to determine an appropriate thermostat damping factor given a timestep size and a numerical integration method? I am computing a set of simulations in LAMMPS, using ReaxFF, tracking ...
9
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0answers
63 views

How to create a Potential Energy Surface in Chemcraft?

The Chemcraft website says that it is possible to create a potential energy surface. Nevertheless, it doesn't work for my Gaussian scan job. ...
9
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0answers
79 views

Is there any code that runs WHAM starting from histograms rather than time series?

I'm looking for a way to run the Weighted Histogram Analsys Method, but I don't have a time series to feed to the code as usually happens, but rather I have histograms coming from the debiasing of a ...
7
votes
0answers
32 views

Excited states using ORMAS flag in GAMESS

I am trying to calculate the excited states using single reference CISD on $\ce{CH3OH},$ using ORMAS' CI-X option in GAMESS. As a test example I am using the $\ce{CH3OH}$ that has 2 core, 7 occ. ...
7
votes
0answers
293 views

Is there any code for local-orbital ab initio tight binding molecular dynamics other than fireball?

I was searching for a local-orbital ab-initio tight binding implementation of molecular dynamics and Ive found a code called fireball. Ive tried to compile it but the code seems to be buggy and there ...
6
votes
0answers
32 views

What could be the possible causes of the energy difference in the following calculating using Octopus (TDDFT) code?

I am trying to do a simple ground state energy calculation of methane molecule using the Octopus (TDDFT) code. The example is already available in the octopus manual. ...
6
votes
0answers
94 views

How do the various programs read or write integrals in FCIDUMP format?

The FCIDUMP format was created by Peter Knowles and Nick Handy circa 1989 and now allows many electronic structure software packages to interact with each other. ...
5
votes
0answers
27 views

Interpreting Critic2 charge analysis in metallic systems

I'm using Critic2 software to perform post-processing of the charge density of metallic alloys. With the charge density obtained from the Self-Consistent-Field calculation (for that I'm using Quantum ...
5
votes
0answers
83 views

Fix deposit and USER-REAXC: pre-allocating memory for atoms when using LAMMPS with ReaxFF

I would like to use "fix deposit" with ReaxFF to add atoms to a simulation in which I deposit molecules on a surface. I have built working scripts for my system with other force fields. ...