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Linear interband optical refraction and absorption in strained black phosphorene.

M Yarmohammadi1, M Mortezaei Nobahari1, T S Tien2

  • 1Department of Energy Engineering and Physics, Amirkabir University of Technology, Tehran, Iran.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
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Summary

Strain engineering in monolayer black phosphorus (MBP) induces electronic phase transitions and alters optical properties. This study details how in-plane and out-of-plane strains affect band gaps, refraction, and absorption for nano-optoelectronic applications.

Keywords:
electronic phase transitionmechanical effectsoptical refraction and absorptionphosphorene

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Monolayer black phosphorus (MBP) exhibits significant strain effects on atomic orbital hybridization.
  • Understanding strain-induced changes in MBP is crucial for its application in nano-optoelectronics.

Purpose of the Study:

  • To theoretically investigate the impact of strain on the electronic and optical properties of monolayer black phosphorus.
  • To analyze the relationship between band gap modulation and optical refraction/absorption under various strain conditions.

Main Methods:

  • Utilized the tight-binding model, Harrison rule, and Kubo formula for theoretical analysis.
  • Performed analytical studies on the band gap of strained MBP.
  • Investigated both in-plane and out-of-plane strain effects.

Main Results:

  • Identified electronic phase transitions (semiconductor-to-semimetal/metal and semiconductor-to-insulator) in strained MBP.
  • Demonstrated linear dependence of band gap alterations on compressive and tensile strains.
  • Observed distinct effects of in-plane versus out-of-plane strains on band gap, refraction, and absorption.

Conclusions:

  • Strain engineering offers a pathway to tune the electronic and optical properties of MBP.
  • The interplay between band gap and optical properties under strain is clarified.
  • Results provide insights for designing MBP-based nano-optoelectronic devices.