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Pregled bibliografske jedinice broj: 830168

Effective numbers of charge carriers in doped graphene: Generalized Fermi liquid approach


Kupčić, Ivan; Nikšić, Goran; Rukelj, Zoran; Pelc, Damjan
Effective numbers of charge carriers in doped graphene: Generalized Fermi liquid approach // Physical review. B, 94 (2016), 7; 075434, 12 doi:10.1103/PhysRevB.94.075434 (međunarodna recenzija, članak, znanstveni)


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Naslov
Effective numbers of charge carriers in doped graphene: Generalized Fermi liquid approach

Autori
Kupčić, Ivan ; Nikšić, Goran ; Rukelj, Zoran ; Pelc, Damjan

Izvornik
Physical review. B (2469-9950) 94 (2016), 7; 075434, 12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
quantum transport equations ; lightly doped graphene ; dc and optical conductivity ; energy loss spectroscopy

Sažetak
The single-band current-dipole Kubo formula for the dynamical conductivity of heavily doped graphene from Kupčić [Phys. Rev. B 91, 205428 (2015)] is extended to a two-band model for conduction pi electrons in lightly doped graphene. Using a posteriori relaxation-time approximation in the two-band quantum transport equations, with two different relaxation rates and one quasi-particle lifetime, we explain a seemingly inconsistent dependence of the dc conductivity of ultraclean and dirty lightly doped graphene samples on electron doping, in a way consistent with the charge continuity equation. It is also shown that the intraband contribution to the effective number of conduction electrons in the dc conductivity vanishes at T=0 K in the ultraclean regime, but it remains finite in the dirty regime. The present model is shown to be consistent with a picture in which the intraband and interband contributions to the dc conductivity are characterized by two different mobilities of conduction electrons, the values of which are well below the widely accepted value of mobility in ultraclean graphene. The dispersions of Dirac and pi plasmon resonances are reexamined to show that the present, relatively simple expression for the dynamical conductivity tensor can be used to study simultaneously single-particle excitations in the dc and optical conductivity and collective excitations in energy loss spectroscopy experiments.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekti:
MZOS-119-1191458-0512 - Niskodimenzionalni jako korelirani vodljivi sustavi (Barišić, Slaven, MZOS ) ( POIROT)

Ustanove:
Prirodoslovno-matematički fakultet, Zagreb

Profili:

Avatar Url Zoran Rukelj (autor)

Avatar Url Damjan Pelc (autor)

Avatar Url Goran Nikšić (autor)

Avatar Url Ivan Kupčić (autor)

Poveznice na cjeloviti tekst rada:

doi arxiv.org journals.aps.org

Citiraj ovu publikaciju:

Kupčić, Ivan; Nikšić, Goran; Rukelj, Zoran; Pelc, Damjan
Effective numbers of charge carriers in doped graphene: Generalized Fermi liquid approach // Physical review. B, 94 (2016), 7; 075434, 12 doi:10.1103/PhysRevB.94.075434 (međunarodna recenzija, članak, znanstveni)
Kupčić, I., Nikšić, G., Rukelj, Z. & Pelc, D. (2016) Effective numbers of charge carriers in doped graphene: Generalized Fermi liquid approach. Physical review. B, 94 (7), 075434, 12 doi:10.1103/PhysRevB.94.075434.
@article{article, year = {2016}, pages = {12}, DOI = {10.1103/PhysRevB.94.075434}, chapter = {075434}, keywords = {quantum transport equations, lightly doped graphene, dc and optical conductivity, energy loss spectroscopy}, journal = {Physical review. B}, doi = {10.1103/PhysRevB.94.075434}, volume = {94}, number = {7}, issn = {2469-9950}, title = {Effective numbers of charge carriers in doped graphene: Generalized Fermi liquid approach}, keyword = {quantum transport equations, lightly doped graphene, dc and optical conductivity, energy loss spectroscopy}, chapternumber = {075434} }
@article{article, year = {2016}, pages = {12}, DOI = {10.1103/PhysRevB.94.075434}, chapter = {075434}, keywords = {quantum transport equations, lightly doped graphene, dc and optical conductivity, energy loss spectroscopy}, journal = {Physical review. B}, doi = {10.1103/PhysRevB.94.075434}, volume = {94}, number = {7}, issn = {2469-9950}, title = {Effective numbers of charge carriers in doped graphene: Generalized Fermi liquid approach}, keyword = {quantum transport equations, lightly doped graphene, dc and optical conductivity, energy loss spectroscopy}, chapternumber = {075434} }

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
  • Nature Index


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