Anisotropic plasmons, Friedel oscillations, and screening in 8-Pmmn borophene

Anisotropic plasmons, Friedel oscillations, and screening in 8-Pmmn borophene 8-Pmmn borophene is a polymorph of borophene which hosts an anisotropic tilted Dirac cone. Using a low-energy effective Hamiltonian for borophene, we analytically calculate the density-density response function of borophene and study its anisotropic plasmon dispersion and screening properties. We find that the anisotropic plasmon mode in 8-Pmmn borophene remains undamped for higher energies along the mirror symmetry direction. The Friedel oscillation in borophene is found to decay as r−3 in the large-r limit, with both the amplitude as well as the periodicity of the Friedel oscillations being anisotropic. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Anisotropic plasmons, Friedel oscillations, and screening in 8-Pmmn borophene

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Anisotropic plasmons, Friedel oscillations, and screening in 8-Pmmn borophene

Abstract

8-Pmmn borophene is a polymorph of borophene which hosts an anisotropic tilted Dirac cone. Using a low-energy effective Hamiltonian for borophene, we analytically calculate the density-density response function of borophene and study its anisotropic plasmon dispersion and screening properties. We find that the anisotropic plasmon mode in 8-Pmmn borophene remains undamped for higher energies along the mirror symmetry direction. The Friedel oscillation in borophene is found to decay as r−3 in the large-r limit, with both the amplitude as well as the periodicity of the Friedel oscillations being anisotropic.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.035410
Publisher site
See Article on Publisher Site

Abstract

8-Pmmn borophene is a polymorph of borophene which hosts an anisotropic tilted Dirac cone. Using a low-energy effective Hamiltonian for borophene, we analytically calculate the density-density response function of borophene and study its anisotropic plasmon dispersion and screening properties. We find that the anisotropic plasmon mode in 8-Pmmn borophene remains undamped for higher energies along the mirror symmetry direction. The Friedel oscillation in borophene is found to decay as r−3 in the large-r limit, with both the amplitude as well as the periodicity of the Friedel oscillations being anisotropic.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Jul 10, 2017

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