Unanswered Questions
47 questions with no answers
11
votes
0
answers
145
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Have FDTD methods made inroads into dynamical simulation of electron and/or X-ray scattering by crystals?
I'm afraid this question might be too basic or too naive or both, but here goes!
For optical diffraction by periodic nano-structures (gratings, semiconductor manufacturing metrology) the rigorous ...
8
votes
0
answers
96
views
How do I identify an oblique surface mesh?
I have drawn three surface meshes from a hexagonal material for the $(0001)$, $(1\bar{1}00)$ and $(1\bar{1}01)$.
The first one would be the top horizontal surface of the hexagonal structure, the ...
- 15.9k
7
votes
0
answers
57
views
Database (or table) of functions obeying symmetry properties of space groups
I'm looking for a table or database containing mathematical functions that belong to crystallographic space groups by having the same symmetry elements.
Imagine a 2D square planar lattice. It has a 4-...
7
votes
0
answers
449
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Straightforward formalism to get sets of lattice vectors of fcc (111), (110) and (100) facet surfaces that I can also cite?
I am simulating low energy electron diffraction (LEED) from a polyfaceted sample. Usually it's a single, well-defined flat crystalline surface.
Since low energy electrons (below a few hundred eV) only ...
- 2,074
7
votes
0
answers
201
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How to convert lab frame quaternions and plane normal to misorientation quaternion and crystal plane normal for grain boundaries?
Background
Let qA and qB represent unit, orientation quaternions of grain A and grain B of a grain boundary in the lab reference ...
- 15.9k
5
votes
0
answers
41
views
Rich editing of ASE images
I want to produce some images related to graphene-like materials.
I was able to draw them using ASE visualize module after constructing the atomistic model. However ...
- 24.2k
5
votes
0
answers
397
views
How can I properly plot this .cube file in Python?
Motivation for Post: I saw a question about how to plot a .cube file recently on the Mathematica & Wolfram Language Stack Exchange. It was marked "off-...
- 143
5
votes
0
answers
86
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Packages that can model effects of intense electric fields from femtosecond compressed IR and EUV laser pulses on surfaces?
Laser-based and time-resolved ARPES are relatively1 new techniques to study atomic and especially electronic structure (necessarily) near crystal surfaces and of adsorbed 2D materials on those ...
- 2,074
5
votes
0
answers
47
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How to transform a perturbed surface structure to a reference surface structure?
Say I have a bulk FCC Pt structure obtained from Materials Project with a lattice constant a = 3.94 Å. I first did DFT to relax the bulk structure, and the optimized lattice constant becomes for ...
- 1,970
5
votes
0
answers
120
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How to find the most stable facet for a crystal?
I am trying to find the most stable facet for a crystal, but since there are many possible choices, like (1 0 0),(1 1 0),(1 1 1),(2 1 0), etc. My questions is:
I am wondering how should I determine ...
4
votes
0
answers
45
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Doubt regarding Ehull (energy above convex hull) and formation energy
I am creating a ML model for predicting thermodynamic-stability of 2-d materials, for predicting stability formation energy and Ehull (Energy above convex hull) is used and this is how it is also ...
- 24.2k
4
votes
0
answers
180
views
How to Change the Color Palette of Atoms in ASE GUI
I know that there is a configuration file called gui.py that would be initialized if it is placed in a directory like ...
- 3,770
4
votes
0
answers
115
views
How to load xcrysden GUI in OSX after installing through Macports?
I am using MacOS Ventura, and would like to use xcrysden to visualize my Quantum espresso input and output files. For that, I have installed xcrysden on using Macports. But I am not able to laod the ...
4
votes
0
answers
190
views
Which is the best way to display bonds?
We know that bonds, per se, are only characterized after topological studies but their visualizations is an easy and fast way to see if there are "connections" between some particles.
I ...
- 24.2k
4
votes
0
answers
65
views
Basic principles (and vocabulary) necessary to begin modeling the rate of atom surface diffusion and thermal planarization of ground metal surfaces?
Background:
Surface science experiments very often start with atomically smooth crystal surfaces as substrates. After one experiment ends the surface is sputter cleaned with cycles of keV energy argon ...
- 2,074