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Spectral function in two and three dimensional Dirac electron systems (CROSBI ID 650111)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa

Bonačić Lošić, Željana Spectral function in two and three dimensional Dirac electron systems // Solid-State Science & Research / Juribašić Kulcsár, Marina ; Halasz, Ivan (ur.). Zagreb: Institut Ruđer Bošković, 2017. str. 44-44

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

Povezanost rada

Fizika