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Electronic structure Python package for post analysis and large scale tight-binding DFT/NEGF calculations

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Dear developers, I'm sharing some routines to calculate transport properties using SIESTA and sisl. I'm not sure if this submit is done the properly nor I'm an actual developer, so...

@tfrederiksen @pfebrer this is a first stab at 449. I am starting to grow on the idea. However, as you can see in this PR, there are many places in...

Here in `Geometry.translate2uc`, `nsc` is used to understand which axes to translate: https://github.com/zerothi/sisl/blob/8d6da596972b77451376b5492c42ba490f1bec2c/src/sisl/_core/geometry.py#L1741 I think it should check for periodic boundary conditions instead, no?

We are trying to write a .nc file for a tbtrans simulation using a Hamiltonian read with sisl (0.14.3) from a Wannier90 run. Since the Wannier90 Hamiltonian has complex terms,...

**Describe the feature** I think this would be more natural. instead of `[io, jo, a, b, c]`, it should return `[io, jo], [a, b, c]`

high-priority

> > It seems to me that line 35 is then wrong, no? > > Oh, I see. Yes, indeed `index=1` would give the spin density and not the down-component...

medium-priority

E.g. in the case of `Geometry` there are implementations to convert from/to ASE atoms. So with a simple wrapper it should be easy to support: ```python import ase import sisl...

low-priority

**Describe the feature** @pfebrer did #608 in response to #606. I have been looking around on `typer` and trying to get a grasp of where the project is heading. I...

**Describe the bug** Running tests when building sisl with `WITH_FORTRAN=OFF` will create errors. It isn't fully clear to me whether we should have a global variable: ```python sisl.build.with_fortran ``` which...