Autor: Potasz, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of the quantum spin Hall and quantum anomalous Hall effects in a two-dimensional decorated lattice using entanglement spectrum
Autorzy:: Piekarska, A.
Potasz, P.
Wójs, A.
Powiązania:: https://bibliotekanauki.pl/articles/1160112.pdf
Data publikacji:: 2016-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.20.At
73.43.Cd
Opis:: We study topological properties of a two-dimensional decorated lattice using entanglement spectrum and trace index. Using these measures, we distinguish various phases of the system predicted recently, including the quantum spin Hall effect and quantum anomalous Hall effect. The topologically trivial and non-trivial phases are identified, with assignment of a Chern number to each of the bands.
Źródło:: Acta Physica Polonica A; 2016, 129, 1a; A-87-A-89
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Analysis of Optical Properties of MoS₂ Monolayer using Minimal-Basis Tight-Binding Models
Autorzy:: Nouri, N.
Potasz, P.
Zia Borujeni, S.
Wójs, A.
Rashedi, G.
Powiązania:: https://bibliotekanauki.pl/articles/1033775.pdf
Data publikacji:: 2017-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.20.At
78.67.-n
78.20.Bh
Opis:: Optical properties of transition metal dichalcogenides monolayer of MoS₂ are analyzed using multi-orbital tight-binding models with only Mo d-orbitals (three-band model) and with an inclusion of S p-orbitals (six-band model). We look at band structures, momentum matrix elements between valence and conduction band, and joint optical density of states. Good agreement between the two models is shown in a vicinity of K point of the Brillouin zone. On line connecting K and Γp points, a local conduction band minimum at Q point is recovered only by six-band model in agreement with density functional theory and experimental results. We show that optical transitions at this point are active for both light polarizations. A peak in joint optical density of states is also seen at this point suggesting its potentially important role in a proper description of excitonic effects.
Źródło:: Acta Physica Polonica A; 2017, 132, 2; 313-315
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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