Acoustic Plasmons in Graphene Sandwiched between Two Metallic Slabs
Autori: Salasnich; Luca
Affiliazione autori: Univ Padua, CNISM, Dipartimento Fis & Astron Galileo Galilei, Via Marzolo 8, I-35131 Padua, Italy; Ist Nazl Fis Nucl, Via Marzolo 8, I-35131 Padua, Italy; Univ Padua, Padua Quantum Technol Res Ctr, Via Gradenigo 6-B, I-35131 Padua, Italy; Consiglio Nazl Ric CNR, Ist Nazl Ott INO, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy
Abstract: We study the effect of two metallic slabs on the collective dynamics of electrons in graphene positioned between the two slabs. We show that if the slabs are perfect conductors, the plasmons of graphene display a linear dispersion relation. The velocity of these acoustic plasmons crucially depends on the distance between the two metal gates and the graphene sheet. In the case of generic slabs, the dispersion relation of graphene plasmons is much more complicated, but we find that acoustic plasmons can still be obtained under specific conditions.
Volume: 13 (4) Da Pagina: 684-1 A: 684-5
Parole chiavi: graphene, quantum many-body theory, acoustic plasmonsDOI: 10.3390/sym13040684