Naslov
Spectral function in two and three dimensional Dirac electron systems

Autori
Bonačić Lošić, Željana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Solid-State Science & Research / Juribašić Kulcsár, Marina ; Halasz, Ivan - Zagreb : Institut Ruđer Bošković, 2017, 44-44

ISBN
978-953-7941-15-4

Skup
Solid-State Science & Research

Mjesto i datum
Zagreb, Hrvatska, 28.06.2017. - 30.06.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Plasmon, Spectral function

Sažetak
Dirac electrons have been applied in condensed matter physics to study a variety of novel materials, including graphene, three-dimensional topological insulators, monolayer of molybdenum disulfide (MoS2), and recently discovered three-dimensional topological Dirac semimetals which can be seen as the three-dimensional analogs of graphene. We present the study on the spectral properties of the two-dimensional and three-dimensional systems of massless Dirac electrons, related to the ARPES (angle resolved photoemission spectroscopy) data of these materials. We use the G0W0 approximation for the calculation of the one-particle spectral function for conducting Dirac electron band. Starting from the dynamically screened long-range Coulomb electron-electron interaction, we determine the electron self-energy paying particular attention to the contribution coming from the collective plasmon mode. The obtained results show a dispersing feature in the spectral function due to the plasmon mode and a low energy quasi-particle. We expect the results obtained for the two-dimensional system to be qualitatively in agreement with spectral properties of monolayer of MoS2, while our findings for the three-dimensional system set an insight on spectral properties of recently fabricated three-dimensional topological Dirac semimetals.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA