Pregled bibliografske jedinice broj: 851042
Changing character of electronic transitions in graphene : From single-particle excitations to plasmons
Changing character of electronic transitions in graphene : From single-particle excitations to plasmons // Physical review. B, Condensed matter and materials physics, 91 (2015), 195407, 8 doi:10.1103/PhysRevB.91.195407 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 851042 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Changing character of electronic transitions in graphene : From single-particle excitations to plasmons
Autori
Novko, Dino ; Despoja, Vito ; Šunjić, Marijan
Izvornik
Physical review. B, Condensed matter and materials physics (1098-0121) 91
(2015);
195407, 8
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Pi plasmon ; graphene ; EELS
Sažetak
In this paper we clarify the nature of π and π + σ electron excitations in pristine graphene. We clearly demonstrate the continuous transition from single particle to collective character of such excitations and how screening modifies their dispersion relations. We prove that π and π + σ plasmons do exist in graphene, though occurring only for a particular range of wave vectors and with finite damping rate. Particular attention is paid to comparing the theoretical results with available EELS measurements in optical (Q ≈ 0) and other (Q = 0) limits. The conclusions, based on microscopic numerical results, are confirmed in an approximate analytical approach.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
