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Achieving controllable multifunctionality through layer sliding.

Mubashar Ali1, Masood Yousaf1, Junaid Munir2

  • 1Department of Physics, University of Education, Lahore, Pakistan.

Journal of Molecular Graphics & Modelling
|September 27, 2023
PubMed
Summary
This summary is machine-generated.

Layer-sliding dynamically tunes the properties of silicene/hexagonal boron nitride heterostructures. Mg intercalation enhances stability and modifies electronic and optical characteristics, offering a route to multifunctional layered materials.

Keywords:
Interfacial electronic propertiesLayer-slidingMg-intercalationMultifunctionalitySilicene/hBN HSTuning of physical properties

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Computational Materials Science

Background:

  • Controllable variation of physical properties is key for developing multifunctional materials.
  • Two-dimensional (2D) van der Waals heterostructures (vdW-HS) offer tunable properties through stacking and functionalization.

Purpose of the Study:

  • To investigate the effects of layer-sliding on the structural, electronic, and optical properties of silicene/hexagonal boron nitride (hBN) vdW-HS.
  • To explore the influence of Magnesium (Mg) intercalation on the stability and properties of these heterostructures.

Main Methods:

  • Screening of stable stacking configurations for silicene/hBN vdW-HS.
  • Simulation of layer-sliding in both unintercalated and Mg-intercalated vdW-HS.
  • Calculation of structural parameters, binding energies, electronic band gaps, charge densities, and optical spectra (dielectric function, electron energy loss, refractive index, etc.).

Main Results:

  • Mg-intercalated vdW-HS exhibit significantly enhanced stability compared to unintercalated counterparts.
  • Layer-sliding induces changes in band gaps and interfacial electronic behavior (charge transfer).
  • Mg intercalation reduces polarization and energy losses, while layer-sliding modifies diverse optical spectra.

Conclusions:

  • Layer-sliding is a viable method to dynamically tune the properties of 2D vdW-HS.
  • Mg intercalation enhances the stability and modifies the electronic and optical responses of silicene/hBN heterostructures.
  • The proposed layer-sliding approach provides a general strategy for achieving multifunctionality in layered materials.