Plasmons and screening in monolayer and multilayer black phosphorus

Low, T. ; Roldán, R. ; Wang, H. ; Xia, F. ; Avouris, P. ; Moreno, L.M. (Universidad de Zaragoza) ; Guinea, F.

Resumen: Black phosphorus exhibits a high degree of band anisotropy. However, we find that its in-plane static screening remains relatively isotropic for momenta relevant to elastic long-range scattering processes. On the other hand, the collective electronic excitations in the system exhibit a strong anisotropy. Band nonparabolicity, due to interband couplings, leads to a plasmon frequency which scales as nß, where n is the carrier concentration, and ß<12. Screening and charge distribution in the out-of-plane direction are also studied using a nonlinear Thomas-Fermi model.

Idioma: Inglés

DOI: 10.1103/PhysRevLett.113.106802

Año: 2014

Publicado en: Physical Review Letters 113, 10 (2014), -
ISSN: 0031-9007

Factor impacto JCR: 7.512 (2014)

Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 6 / 78 = 0.077 (2014) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2011-23713

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)