Spectral function in two and three dimensional Dirac electron systems (CROSBI ID 650111)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Bonačić Lošić, Željana
engleski
Spectral function in two and three dimensional Dirac electron systems
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.
Plasmon, Spectral function
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Podaci o prilogu
44-44.
2017.
objavljeno
Podaci o matičnoj publikaciji
Solid-State Science & Research
Juribašić Kulcsár, Marina ; Halasz, Ivan
Zagreb: Institut Ruđer Bošković
978-953-7941-15-4
Podaci o skupu
Solid-State Science & Research
predavanje
01.01.2017-01.01.2017
Zagreb, Hrvatska