17 Questions 18 Answers 0 Followers
Questions related from Shakeel Ahmad
During calculations, sometimes I face such graphs. I want to know their physical meaning and why they appear. please
22 December 2023 9,495 1 View
I want to build a crystal structure using the below information: Lattice constant: a=b=c=3.867 A Structure: FCC. I am unable to build. Can anyone guide me on how I can build in CASTEP? Bundles of...
30 November 2023 5,931 2 View
I am working on a material using the GGA-RPBE functional in the CASTEP tool for the elstic constant calculations. I am facing errors again and again and am unable to resolve this issue. I am not...
02 November 2023 2,740 7 View
I am working on hydrogen storage application and I want to find gravimetric hydrogen value kindly help me how I can find it?
25 July 2023 9,382 0 View
Can anyone guide me regarding the above query? I will be thankful.
07 February 2023 7,254 1 View
After doping when I run job failed again and again. The image is attached. Kindly guide me. In advance bundles of thanks.
13 November 2022 5,250 14 View
I want to find the gravimetric ratio but am facing a problem calculating "p". Kindly guide me. Using this formula see the image.
28 August 2022 1,347 0 View
Using CASTEP I studied optical and electronic properties under increasing pressure effect. Observing absorption coefficient, reflectivity, conductivity, and band gap increase with increasing...
02 August 2022 8,702 0 View
What is an absorption edge? what it's the function? how we can locate/ mark?
12 March 2022 243 2 View
For lithium niobate, as I increase the pressure as a result the bandgap also increases but lattice parameters decreases. I am applying equal pressure in all directions (x, y, z). anyone can...
11 March 2022 9,468 6 View
I am finding atomic positions of above mentioned compound with 15-C2/c group. I am not finding please anybody help.
06 January 2022 3,783 1 View
What are the formulae of Voigt, Reuss and Hill Poisson ratio in terms of independent elastic constants (C11, C12, C44) or in terms of bulk and shear moduli for cubic ? Whether they are same or...
28 December 2021 10,014 1 View
One Bulk modulus value we get in BFGS and other bulk modulus value CASTEP give us during elastic constant analysis. Now my question is that what are difference between them ? why they are...
26 December 2021 9,262 0 View
I am working on Perovskites oxides (Niobium based) for orthorhombic phase using space group 62-Pnma with the help of DFT based CASTEP code. I found zero bandgap energy. Now anyone can guide me...
12 November 2021 7,097 4 View
I am working on LiNbO3 (space group: 62-Pnma, orthorhombic with suitable lattice parameters) using DFT based CASTEP code. I found band gap zero eV. Now how me should handle it for different...
11 November 2021 9,685 5 View
Need help and guidance. My system specifications are: Processor - Intel (R) Core (TM) i5-8250U CPU @ 1.60 Hz a.80 GHz Installed Memory - 8.00 GB (7.76 GB useable) System type: 64 bit operating...
28 October 2021 6,718 3 View
I have installed and uninstalled Mendeley Desktop Word Plug-In many times but in MS word Mendeley word plug in is not showing. kindly guide me how I can tackle it.
26 September 2021 2,274 2 View
