Plasmons and screening in a monolayer of MoS2
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Physical SocietyDate
2013-07-25Citation
10.1103/PhysRevB.88.035135
Physical Review B 88.3 (2013): 035135
ISSN
1550-235X (online); 1098-0121 (print)DOI
10.1103/PhysRevB.88.035135Funded by
This work was supported by Deutsche Forschungsgemeinschaft via Grant No. GRK 1570, by FCT under Grants No. PTDC/FIS/101434/2008 and No. PTDC/FIS/113199/2009, and MIC under Grant No. FIS2010-21883-C02-02Project
Gobierno de España. FIS2010- 21883-C02-02Editor's Version
http://dx.doi.org/10.1103/PhysRevB.88.035135Subjects
FísicaRights
© 2013 American Physical SocietyAbstract
We investigate the dynamical dielectric function of a monolayer of molybdenum disulfide within the random phase approximation. While in graphene damping of plasmons is caused by interband transitions, due to the large direct band gap in monolayer MoS2 collective charge excitations enter the intraband electron hole continuum similarly to the situation in two-dimensional electron and hole gases. Since there is no electron-hole symmetry in MoS 2, the plasmon energies in p- and n-doped samples clearly differ. The breaking of spin degeneracy caused by the large intrinsic spin-orbit interaction leads to a beating of Friedel oscillations for sufficiently large carrier concentrations, for holes as well as for electrons
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Google Scholar:Scholz, Andreas
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Stauber, Tobias
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Schliemann, John
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