Passivation for surface calculations.

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SUMMARY

This discussion focuses on the process of passivation for surface calculations in materials science, specifically targeting the removal of metallic surface states in band structure calculations. The user seeks guidance on selecting appropriate atoms or molecules for effective passivation while minimizing computational load. The goal is to bond unpaired electrons at the surface to create a band gap, enhancing the accuracy of surface electronic property predictions. References and examples beyond basic cases are requested to aid in this complex task.

PREREQUISITES
  • Understanding of band structure calculations in materials science
  • Familiarity with surface chemistry and passivation techniques
  • Knowledge of unpaired electron behavior in surface states
  • Experience with computational modeling tools for material properties
NEXT STEPS
  • Research specific passivation techniques for different materials
  • Explore advanced surface chemistry references and case studies
  • Learn about computational tools like VASP or Quantum ESPRESSO for band structure calculations
  • Investigate methods for optimizing computational efficiency in surface modeling
USEFUL FOR

Materials scientists, computational chemists, and researchers involved in surface property analysis and electronic structure calculations will benefit from this discussion.

dipole
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Hello, I am doing some calculations of the band structures of the surfaces of several materials. I would like to perform passivisation on these surfaces so as to remove any metallic surface states. Unfortunately, I was never great at chemistry and so it's not obvious to me how to choose what atoms or molecules to use to passivate the surface (ideally as few as possible to reduce computation time).

I've been looking for a reference that talks about how one might do so, ideally with some examples that are not just the simplest possible case. Anyone know of a good reference?

To be clear, when I say passivate here what I mean is that I want to pair any unpaired electrons at the surface that result from "cutting" the bulk to form the surface by bonding them with another atom in such a way that there is a band gap at the surface.

Thanks.
 
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