This title appears in the Scientific Report :
2016
Please use the identifier:
http://hdl.handle.net/2128/13315 in citations.
Screening and plasmons in pure and disordered single- and bilayer black phosphorus
Screening and plasmons in pure and disordered single- and bilayer black phosphorus
We study collective plasmon excitations and screening of pure and disordered single- and bilayer black phosphorus beyond the low energy continuum approximation. The dynamical polarizability of phosphorene is computed using a tight-binding model that properly accounts for the band structure in a wide...
Saved in:
Personal Name(s): | Jin, Fengping (Corresponding author) |
---|---|
Roldán, R. / Katsnelson, M. I. / Yuan, S. | |
Contributing Institute: |
Jülich Supercomputing Center; JSC |
Imprint: |
2016
|
Conference: | Condensed Matter in Groningen, Groningen (The Netherlands), 2016-09-04 - 2016-09-09 |
Document Type: |
Poster |
Research Program: |
Computational Science and Mathematical Methods |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
We study collective plasmon excitations and screening of pure and disordered single- and bilayer black phosphorus beyond the low energy continuum approximation. The dynamical polarizability of phosphorene is computed using a tight-binding model that properly accounts for the band structure in a wide energy range. Electron-electron interaction is considered within the Random Phase Approximation. Damping of the lasmon modes due to different kinds of disorder, such as resonant scatterers and long-range disorder potentials, is analyzed. We further show that an electric field applied perpendicular to bilayer phosphorene can be used to tune the dispersion of the plasmon modes. For sufficiently large electric field, the bilayer BP enters in a topological phase with a characteristic plasmon spectrum, which is gaped in the armchair direction. |