Questions tagged [metals]

Questions about metals.

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Continuous Coordination Number Definition

I am interesting in quantifying the coordination number of some atoms in metals and am curious what approaches to defining a coordination number are possible for an atom. In particular, I am curious ...
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6 votes
1 answer
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Are there any available tools to implement Jellium models?

I want to solve a Jellium-DFT like problem. Does any of the self-consistent/DFT software packages available allow to solve for the case of a Jellium configuration (no lattice)? If not I would like to ...
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5 votes
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"Failed" running DDEC6 Atomic Charge when using Palladium (Pd) cluster model

I have a problem with running DDEC6 when I used Palladium (Pd) cluster, the main issue was that there were no DDEC6_even_templered_net_atomic_charges.xyz files came ...
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  • 51
5 votes
1 answer
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Smearing values for different codes

I am using Quantum Espresso along with a different code, I am performing calculations on Platinum bulk. After choosing the "cold" smearing (which I read is a good choice for metals) with a ...
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11 votes
2 answers
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Is there any specific name for non-ferrous metals which are not noble metals?

In German there is the name "Buntmetalle" which means "colorful metals" for non-ferrous metals which are also not noble metals: Cadmium (Cd), Cobalt (Co), Copper (Cu), Nickel (Ni),...
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  • 155
8 votes
2 answers
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Can the color of gold metal be reproduced by modeling only the conduction electron band structure, or do atomic absorption lines contribute?

@JohnCuster's answer to Why is gold golden? is based on the band structure of the delocalized conduction electrons in gold, whereas other answers there tend to support the "Gold is gold due to ...
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6 votes
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What will be the cohesive energy of an alloy in LAMMPS? [closed]

The cohesive energy of a pure material is generally termed as the energy of a unit cell divided by the number of atoms. what will be cohesive energy of an alloy in LAMMPS? I am running LAMMPS for $\ce{...
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5 votes
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A doubt about extended dislocation [closed]

I wonder why this phenomenon occurs: "Unlike unextended screw dislocations, the extended screw dislocations define a specific slip plane, the {111} plane of the fault and it will be constrained ...
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6 votes
1 answer
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Generating glass nanocomposite structure in VESTA

I want to draw Pd(75)Au(5)Si(20) metallic glass nanocomposite. How to draw exact this metallic glass nanocomposite.
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11 votes
1 answer
74 views

Modelling nitrogen interstitial barrier to oxygen diffusion in metals

I want to study the effect of nitrogen interstitials on oxygen diffusion in metals and vice-versa. Would you suggest MSD calculations in LAMMPS to be a viable method for this? There aren't many ...
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  • 457
11 votes
1 answer
158 views

Are there any other options beyond increasing the k-sampling and the number of unoccupied bands, to achieve better results?

I am trying to determine the optical properties of bulk Aluminium and related alloys using Quantum ESPRESSO. I am using both the epsilon.x and the simple.x modules to get wavelength-dependent ...
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17 votes
1 answer
204 views

Fermi level change in surfaces with adsorbed molecules

In a DFT standard calculation of a solid 3D material (i.e. bulk metal), one of the properties that can be obtained is the Fermi level $E_F$. This feature is related with the required work to add an ...
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