Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Jacek Piechota"'
Autor:
Konrad Sakowski, Pawel Strak, Pawel Kempisty, Jacek Piechota, Izabella Grzegory, Piotr Perlin, Eva Monroy, Agata Kaminska, Stanislaw Krukowski
Publikováno v:
Materials, Vol 17, Iss 18, p 4581 (2024)
A nonradiative recombination channel is proposed, which does not vanish at low temperatures. Defect-mediated nonradiative recombination, known as Shockley–Read–Hall (SRH) recombination, is reformulated to accommodate Coulomb attraction between th
Externí odkaz:
https://doaj.org/article/6ab727453cec4f758c5eeff9bf9bded8
Ab Initio Molecular Dynamics Insight to Structural Phase Transition and Thermal Decomposition of InN
Autor:
Jacek Piechota, Stanislaw Krukowski, Bohdan Sadovyi, Petro Sadovyi, Sylwester Porowski, Izabella Grzegory
Publikováno v:
International Journal of Molecular Sciences, Vol 25, Iss 15, p 8281 (2024)
Extensive ab initio density functional theory molecular dynamics calculations were used to evaluate stability conditions for relevant phases of InN. In particular, the p-T conditions of the thermal decomposition of InN and pressure-induced wurtzite
Externí odkaz:
https://doaj.org/article/f72987e6e09046799f10def79f7d7c7b
Autor:
Ashfaq Ahmad, Pawel Strak, Pawel Kempisty, Konrad Sakowski, Jacek Piechota, Yoshihiro Kangawa, Izabella Grzegory, Michal Leszczynski, Zbigniew R. Zytkiewicz, Grzegorz Muziol, Eva Monroy, Agata Kaminska, Stanislaw Krukowski
Publikováno v:
Materials, Vol 16, Iss 3, p 1227 (2023)
Polarization doping in a GaN-InN system with a graded composition layer was studied using ab initio simulations. The electric charge volume density in the graded concentration part was determined by spatial potential dependence. The emerging graded p
Externí odkaz:
https://doaj.org/article/0f524f866f2b40e6b62f5fa87309fd46
Autor:
Ashfaq Ahmad, Pawel Strak, Kamil Koronski, Pawel Kempisty, Konrad Sakowski, Jacek Piechota, Izabella Grzegory, Aleksandra Wierzbicka, Serhii Kryvyi, Eva Monroy, Agata Kaminska, Stanislaw Krukowski
Publikováno v:
Materials, Vol 14, Iss 17, p 4935 (2021)
In this paper, ab initio calculations are used to determine polarization difference in zinc blende (ZB), hexagonal (H) and wurtzite (WZ) AlN-GaN and GaN-InN superlattices. It is shown that a polarization difference exists between WZ nitride compounds
Externí odkaz:
https://doaj.org/article/ee1c5a9d55a641c3be4cac52a306fed4
Autor:
Jacek Piechota, Stanislaw Krukowski, Petro Sadovyi, Bohdan Sadovyi, Sylwester Porowski, Izabella Grzegory
Publikováno v:
Materials, Vol 14, Iss 5, p 1306 (2021)
The dissolution of molecular nitrogen in Ga and Fe was investigated by ab initio calculations and some complementary experiments. It was found that the N bonding inside these solvents is fundamentally different. For Ga, it is between Ga4s and Ga4p an
Externí odkaz:
https://doaj.org/article/cf5e990e6c42413eb462b84863ac8987
Autor:
Ashfaq Ahmad, Pawel Strak, Pawel Kempisty, Konrad Sakowski, Jacek Piechota, Yoshihiro Kangawa, Izabella Grzegory, Michal Leszczynski, Zbigniew R. Zytkiewicz, Grzegorz Muziol, Eva Monroy, Agata Kaminska, Stanislaw Krukowski
Publikováno v:
Journal of Applied Physics
Journal of Applied Physics, 2022, 132 (6), pp.064301. ⟨10.1063/5.0098909⟩
Web of Science
Journal of Applied Physics, 2022, 132 (6), pp.064301. ⟨10.1063/5.0098909⟩
Web of Science
In this work, we study the emergence of polarization doping in AlxGa1-xN layers with graded composition from a theoretical viewpoint. We demonstrate that the charge conservation law applies for fixed and mobile charges separately, leading to nonlocal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83fb89e69c9e3755256df780bdedb879
https://hal.science/hal-03944488
https://hal.science/hal-03944488
Autor:
Stanislaw Krukowski, Konrad Sakowski, Paweł Strak, Paweł Kempisty, Jacek Piechota, Izabella Grzegory
Step pattern stability of the vicinal surfaces during growth was analyzed using various surface kinetic models. It was shown that standard analysis of the vicinal surfaces provides no indication on the possible step coalescence and therefore could no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90096f1bc3aa92aeaa02eef7868b255e
Autor:
Pawel Strak, Jacek Piechota, Pawel Kempisty, Kamil Koronski, Konrad Sakowski, Eva Monroy, Izabella Grzegory, Serhii Kryvyi, A. Wierzbicka, Agata Kaminska, Stanislaw Krukowski, Ashfaq Ahmad
Publikováno v:
Materials
Volume 14
Issue 17
Materials, MDPI, 2021, 14 (17), pp.4935. ⟨10.3390/ma14174935⟩
Materials, 2021, 14 (17), pp.4935. ⟨10.3390/ma14174935⟩
Materials, Vol 14, Iss 4935, p 4935 (2021)
Volume 14
Issue 17
Materials, MDPI, 2021, 14 (17), pp.4935. ⟨10.3390/ma14174935⟩
Materials, 2021, 14 (17), pp.4935. ⟨10.3390/ma14174935⟩
Materials, Vol 14, Iss 4935, p 4935 (2021)
In this paper, ab initio calculations are used to determine polarization difference in zinc blende (ZB), hexagonal (H) and wurtzite (WZ) AlN-GaN and GaN-InN superlattices. It is shown that a polarization difference exists between WZ nitride compounds
Autor:
Pawel Strak, Konrad Sakowski, Jacek Piechota, Agata Kaminska, Ashfaq Ahmad, Stanislaw Krukowski, Pawel Kempisty
Publikováno v:
Journal of Applied Physics. 132:164306
Ab initio simulations were applied for nonpolar GaN/AlN superlattices of various widths for the first time giving band diagrams and optical transition oscillator strengths. The results confirmed the absence of electric fields in m-plane GaN/AlN multi
Autor:
Sylwester Porowski, Bohdan Sadovyi, Stanislaw Krukowski, Petro Sadovyi, Izabella Grzegory, Jacek Piechota
Publikováno v:
Materials
Volume 14
Issue 5
Materials, Vol 14, Iss 1306, p 1306 (2021)
Volume 14
Issue 5
Materials, Vol 14, Iss 1306, p 1306 (2021)
The dissolution of molecular nitrogen in Ga and Fe was investigated by ab initio calculations and some complementary experiments. It was found that the N bonding inside these solvents is fundamentally different. For Ga, it is between Ga4s and Ga4p an