TY - JOUR
T1 - Plasmons and screening in monolayer and multilayer black phosphorus
AU - Low, Tony
AU - Roldán, Rafael
AU - Wang, Han
AU - Xia, Fengnian
AU - Avouris, Phaedon
AU - Moreno, Luis Martín
AU - Guinea, Francisco
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/9/4
Y1 - 2014/9/4
N2 - 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 nβ, where n is the carrier concentration, and β<12. Screening and charge distribution in the out-of-plane direction are also studied using a nonlinear Thomas-Fermi model.
AB - 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 nβ, where n is the carrier concentration, and β<12. Screening and charge distribution in the out-of-plane direction are also studied using a nonlinear Thomas-Fermi model.
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U2 - 10.1103/PhysRevLett.113.106802
DO - 10.1103/PhysRevLett.113.106802
M3 - Article
AN - SCOPUS:84908242519
SN - 0031-9007
VL - 113
JO - Physical review letters
JF - Physical review letters
IS - 10
M1 - 106802
ER -