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Localized orbital scaling correction for periodic systems.

Aaron Mahler1, Jacob Williams2, Neil Qiang Su2,3

  • 1Department of Physics, Duke University, Durham, North Carolina 27708, USA.

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Summary
This summary is machine-generated.

The localized orbital scaling correction (LOSC) method was extended to periodic systems, improving density functional theory predictions for semiconductor band gaps. This approach corrects delocalization errors, enhancing accuracy for materials science applications.

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Area of Science:

  • Computational materials science
  • Quantum chemistry
  • Solid-state physics

Background:

  • Density functional theory (DFT) approximations often exhibit delocalization error, leading to inaccurate predictions of electronic properties.
  • This error affects critical material properties such as energy band gaps, electronic structure, and charge distribution.

Purpose of the Study:

  • To extend the localized orbital scaling correction (LOSC) method to periodic systems for accurate electronic structure calculations.
  • To address the delocalization error in DFT for bulk materials, particularly semiconductors and insulators.

Main Methods:

  • Extension of the LOSC method to periodic systems using dually localized Wannier functions.
  • Modification of the LOSC energy correction to incorporate a screened Coulomb kernel to account for the bulk environment.

Main Results:

  • The screened LOSC method demonstrates consistent improvement in predicting energy band gaps for semiconductors and large-gap insulators.
  • The modified LOSC approach effectively corrects delocalization errors in periodic DFT calculations.

Conclusions:

  • The screened LOSC method offers a robust way to enhance the accuracy of DFT for periodic systems.
  • This advancement is crucial for reliable prediction of electronic properties in condensed matter physics and materials design.