Quantum hydrodynamic modeling of edge modes in chiral Berry plasmons

Quantum hydrodynamic modeling of edge modes in chiral Berry plasmons A quantum hydrodynamic model is used to study the edge modes of chiral Berry plasmons in two-dimensional materials with nonzero Berry flux. A quantum effect of collective electron motions appears in systems with a high electron density. For the considered edge plasmon, the transcendental equation of the dispersion relation is solved nonlinearly and semianalytically. We predict a one-way chiral edge state in the presence of the quantum statistical effect and quantum diffraction effect. Indeed, the plasmon frequencies for counterpropagating edge modes exhibit different long-wavelength limits. The quantum effect can enhance the chirality of edge plasmons and their spatial confinement. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Quantum hydrodynamic modeling of edge modes in chiral Berry plasmons

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Quantum hydrodynamic modeling of edge modes in chiral Berry plasmons

Abstract

A quantum hydrodynamic model is used to study the edge modes of chiral Berry plasmons in two-dimensional materials with nonzero Berry flux. A quantum effect of collective electron motions appears in systems with a high electron density. For the considered edge plasmon, the transcendental equation of the dispersion relation is solved nonlinearly and semianalytically. We predict a one-way chiral edge state in the presence of the quantum statistical effect and quantum diffraction effect. Indeed, the plasmon frequencies for counterpropagating edge modes exhibit different long-wavelength limits. The quantum effect can enhance the chirality of edge plasmons and their spatial confinement.
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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.96.045104
Publisher site
See Article on Publisher Site

Abstract

A quantum hydrodynamic model is used to study the edge modes of chiral Berry plasmons in two-dimensional materials with nonzero Berry flux. A quantum effect of collective electron motions appears in systems with a high electron density. For the considered edge plasmon, the transcendental equation of the dispersion relation is solved nonlinearly and semianalytically. We predict a one-way chiral edge state in the presence of the quantum statistical effect and quantum diffraction effect. Indeed, the plasmon frequencies for counterpropagating edge modes exhibit different long-wavelength limits. The quantum effect can enhance the chirality of edge plasmons and their spatial confinement.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Jul 5, 2017

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