Re: [QE-users] Reg - Absorption spectrum study

2022-04-29 Thread Stefano Baroni
It depends on the level of theory implemented in the codes you want to compare with. SB > On 29 Apr 2022, at 14:09, Vivek Christhunathan wrote: > > Dear Stefano Baroni, > > I apologise for not conveying the message clearly. To convert energy (eV) to > wavelength (nm), I used the formula (nm

Re: [QE-users] Reg - Absorption spectrum study

2022-04-29 Thread Vivek Christhunathan
Dear Stefano Baroni, I apologise for not conveying the message clearly. To convert energy (eV) to wavelength (nm), I used the formula (nm = hc/eV), and I even made graphs like "Wavelength vs Absorption". My main concern is that if I use this approach (eels.x), will I be able to compare my results

Re: [QE-users] Reg - Absorption spectrum study

2022-04-29 Thread Stefano Baroni
I am very sorry to seem even ruder than I am, but it does not take any sophisticated code to convert an energy to a wavelength. A pocket calculator (or even paper and pencil) would do. This is explained in every elementary textbook in quantum mechanics that every user of every sophisticated

Re: [QE-users] Reg - Absorption spectrum study

2022-04-29 Thread Vivek Christhunathan
Dear Iurii, Thank you very much for your prompt response. The provided paper is very useful. I have gone through the paper and the absorption graph of "Photon energy (eV) vs Absorption", but the study I am doing will require "Wavelength (nm) vs Absorption". I want your thoughts on, if I can

Re: [QE-users] Reg - Absorption spectrum study

2022-04-28 Thread Iurii TIMROV via users
Institute of Technology Lausanne (EPFL) CH-1015 Lausanne, Switzerland +41 21 69 34 881 http://people.epfl.ch/265334 From: users on behalf of Vivek Christhunathan Sent: Wednesday, April 27, 2022 11:15:21 PM To: Quantum ESPRESSO users Forum Subject: [QE-users] Reg

[QE-users] Reg - Absorption spectrum study

2022-04-27 Thread Vivek Christhunathan
Hello Everyone, I tried to predict the absorption spectrum properties of pure and TM cations -doped TiO2 by using turbo_davidson, turbo_lanczos, and epsilon.x methods. But I could not bring results due to multiple issues with TDDFT (i.e., PPs issues and metallic properties of the material issues,