Questions tagged [vibrations]
Questions concerning molecular and solid vibrational modes.
5
questions with no upvoted or accepted answers
19
votes
0
answers
217
views
Is there a software that can do derivatives with respect to user defined vibrational modes?
I'm doing some property calculations that depend on a sum of derivatives of some quantity with respect to normal vibrational modes. I was hoping to find some physical intuition relating the type of ...
- 15.2k
7
votes
0
answers
148
views
How do you calculate a full quartic force field for anharmonic frequencies?
I am an experimental chemist interested in anharmonicity—I am particularly interested in how to calculate anharmonic frequencies. The method I have the most experience with is (generalised) second ...
- 315
6
votes
0
answers
228
views
How do you Select a Time Step for Molecular Dynamics Simulations?
It seems there is a general agreement among the practitioners of Molecular Dynamics that 1fs is a fairly reasonable time step, with shorter time steps being required for materials with higher ...
- 929
5
votes
0
answers
48
views
2D Infrared spectroscopy for bulk systems using molecular dynamics
There are some questions and answers (1,2) on this site regarding simple infrared and vibrational density of states calculations with molecular dynamics and there any simple algorithmic descriptions ...
- 2,262
3
votes
0
answers
16
views
Carbon Capture Research - Force Constants & Basis Sets
Greetings Matter Modeling,
I'm researching carbon capture dynamics in the context of sorbent regeneration.
The UN IPCC Net-Zero goal requires 75 Mt-CO₂/year captured by 2030. According to the IEA, we ...
- 31