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Zagadka kryształów

PostDateIconSunday, 11 May 2025 08:08 |

Dziś w radiowej Trójce o 9:05 w audycji Katarzyny Stoparczyk "Zagadkowa niedziela" będzie można usłyszeć głos Marty Sawickiej z naszego Instytutu oraz Amandy Kierun, utalentowanej pianistki i skrzypaczki. Czy uda się wyjaśnić dzieciom czym jest epitaksja, kryształy i cleanroom?

Audycja edukacyjna dla najmłodszych i ich rodziców
 

FIRST TEAM for dr hab. Henryk Turski

PostDateIconWednesday, 07 May 2025 11:39 |

The Foundation for Polish Science (FNP) has announced the results of the FIRST TEAM competition financed by the FENG program. The aim of this program is to enable young researchers to create new teams that will employ young scientists and conduct innovative research with results that have practical applications.

174 projects were submitted to the 1/2024 recruitment. 18 projects received a total amount of PLN 70,984,310.92 (success rate: 10.34%).

The top three highest rated projects included the project "Double-Sided Epitaxy: A New Approach to Semiconductor Device Integration" leaded by dr hab. Henryk Turski, prof. IWC PAN from our Institute at the MBE Epitaxy Laboratory.

Congratulations!

More details, including a ranking list of projects, are available on the FNP website.

 

Exploration of the superconducting properties of FeSe using the high-pressure technique

PostDateIconMonday, 28 April 2025 13:09 |

FeSe is the simplest iron-based superconductor and has a layered structure with alternating Fe and Se layers. Dr. Singh's research group from our Institute has studied the chemical pressure effect by substitution of the Pr element at Fe sites and As-substitution at Se-sites in FeSe compound. Conventional synthesis process (CSP) at ambient pressure and high-pressure growth technique were used. Interestingly, Pr doping at Fe sites preserves Tconset and improves Jc of FeSe0.5Te0.5 regardless of the doping contents and growth conditions. More detail about this study can be found in the recently published paper by: Priya Singh, Manasa Manasa, Mohammad Azam, Tatiana Zajarniuk, Svitlana Stelmakh, Taras Palasyuk, Jan Mizeracki, Tomasz Cetner, Andrzej Morawski, Cezariusz Jastrzębski, Michał Wierzbicki, Shiv J. Singh entitled “Praseodymium doping effect on the superconducting properties of FeSe0.5Te0.5 bulks under ambient and high-pressure growth conditions” Physica C: Superconductivity and its Applications (Elsevier) 633, 1354729 (2025); https://doi.org/10.1016/j.physc.2025.1354729

Figure: The variation of (a) the onset transition temperature (Tc) (b) the transition width (ΔT) (c) the room temperature resistivity (ρ300K) (d) residual resistivity ratio (RRR = ρ300K / ρ20K) (e) the critical current density (Jc) at 7 K for H = 0 T (closed symbol) and 3 T (open symbol) for PrxFe1-xSe0.5Te0.5 bulks prepared by high pressure growth method with respect to the nominal contents (x) of Pr substitutions or Gd- additions.

In the second research paper, Dr. Singh’s research group has concluded their findings on the effects of As-substitution at Se sites in the FeSe system. The observed superconducting transition temperature is approximately 12 K, which is higher than that of the parent compound FeSe1-x. This paper is published by: Priya Singh, Manasa Manasa, Mohammad Azam, Tatiana Zajarniuk, Konrad Kwatek, Tomasz Cetner, Andrzej Morawski, Jan Mizeracki and Shiv J. Singh entitled “Synthesis and characterizations of arsenic doped FeSe bulks” Journal of Superconductivity and Novel Magnetism 38, 109 (2025) https://doi.org/10.1007/s10948-025-06952-5

 

Top Viewed Article in Wiley

PostDateIconThursday, 24 April 2025 18:06 |

We are delighted to share that the work coauthored by the researchers from our Institute, published in physica status solidi (b) basic solid state physics, has ranked within the top 10% of most-viewed papers published by the journal in 2023*:

Origins of Electrical Compensation in Si-Doped HVPE GaN, Prozheev, I., Iwinska, M., Sochacki, T., Bockowski, M., Bès, R. and Tuomisto, F. Phys. Status Solidi B, 260, 2200568 (2023). https://doi.org/10.1002/pssb.202200568

This achievement is a testament to the recognition of this work within the community. Congratulations!

View the award certificate.

*Among work published in physica status solidi (b) basic solid state physics between January 1, 2023 - December 31, 2023, up to 12 months after publication.

 

Publiczna obrona rozprawy doktorskiej mgr. inż. Jakuba Kalabińskiego

PostDateIconThursday, 08 May 2025 15:58 |

Dnia 20 maja 2025 r. (wtorek) o godz. 14.00 w sali seminaryjnej Instytutu Wysokich Ciśnień Polskiej Akademii Nauk w Warszawie, ul. Sokołowska 29/37, odbędzie się publiczna obrona rozprawy doktorskiej mgr. inż. Jakuba Kalabińskiego.
Temat rozprawy: „Charakterystyka równowag fazowych w mieszaninach o ograniczonej mieszalności z wykorzystaniem nowej, autorskiej metody określenia krzywych współistnienia faz”

Pełna treść zawiadomienia

Rozprawa doktorska i recenzje dostępne są na stronie BIP IWC PAN.

 

Wyróżnienie dla prof. Michała Leszczyńskiego

PostDateIconMonday, 28 April 2025 18:20 |

Miło nam podzielić się informacją, że prof. Michał Leszczyński z naszego Instytutu został wyróżniony tytułem Ambasadora Kongresów Polskich za organizację 8th European Conference on Crystal Growth w Warszawie (w 2024 roku). Prof. Leszczyński będzie wraz z dr Pawłem Prystawko w 2026 roku organizował konferencję WOCSDICE-EXMATEC 2026 w Gdańsku (w 2025 roku współorganizuje ją w Hiszpanii).

Program Ambasadorów Kongresów Polskich funkcjonuje od 1998 roku. Dotychczas w gronie Ambasadorów znalazło się ponad 330 osób, które swoją wiedzą, reputacją i zaangażowaniem przyczyniły się do sprowadzenia do Polski prestiżowych wydarzeń naukowych i branżowych o zasięgu międzynarodowym. Listę wyróżnionych 21 osób w czasie Gali Ambasadorów Kongresów Polskich można znaleźć pod linkiem.

Prof. Michał Leszczyński odbiera wyróżnienie Ambasadora Kongresów Polskich. Fot. Magda Drewnicka Bajeczne Historie

 

Dr. Szpakiewicz-Szatan earns PhD at WUT

PostDateIconThursday, 24 April 2025 18:18 |

Congratulations to Dr. Eng. Aleksander Szpakiewicz-Szatan on receiving his academic title. On March 21, 2025, he successfully defended his doctoral dissertation at the Faculty of Physics of the Warsaw University of Technology (WUT), titled: "Nanocomposites from pressure-formed sodium-phosphate and bismuth glasses for applications in energy storage and conversion devices." A summary of the dissertation is available at the provided link. More information here.

Supervisors: Prof. Jerzy Garbarczyk, (Faculty of Physics, Warsaw University of Technology) and Prof. Sylwester Rzoska (Institute of High Pressure Physics, Polish Academy of Sciences).

The conferment of the PhD degree was approved today (April 24, 2025), by the Scientific Discipline Council of the Faculty of Physics, WUT.

The dissertation was developed as part of an ongoing collaboration between the NL-10 Laboratory (X-Press Matter) at the Institute of High Pressure Physics, PAS, and the Solid State Ionics Division of the Faculty of Physics, WUT. This collaboration will continue under a joint research grant.

 

Insights into spontaneous and piezoelectric polarization in nitrides

PostDateIconTuesday, 15 April 2025 13:44 |

We are pleased to inform about the work on spontaneous and piezoelectric polarization published recently in Materials: P. Strak, P. Kempisty, K. Sakowski, J. Piechota, I. Grzegory, E. Monroy, A. Kaminska, S. Krukowski, Spontaneous and Piezo Polarization Versus Polar Surfaces: Fundamentals and Ab Initio Calculations, Materials 2025, 18(7), 1489; https://doi.org/10.3390/ma18071489

The study discusses the fundamental properties of spontaneous and piezoelectric polarization as well as surface polarization. It has been shown that Landau’s definition of polarization as dipole density can be applied to infinite systems. Two components of polarization were distinguished: bulk polarization and surface polarization. This division is consistent with numerous experimental data. A local model of spontaneous polarization was introduced and used to calculate spontaneous polarization in the form of electric dipole density. This model correctly predicted the values of spontaneous polarization for wurtzite-type nitride semiconductors. At the same time, the model showed zero polarization for the zinc blende lattice. The values of spontaneous polarization obtained for wurtzite group III nitrides were consistent with previous calculations carried out using the Berry phase method. First-principles calculations for wurtzite nitride superlattices using the Heyd–Scuseria–Ernzerhof approximation were performed to calculate polarization fields in regularly strained lattices, showing good agreement with the polarization results. These data were used to determine the piezoelectric parameters of wurtzite nitrides, yielding values consistent with earlier results.

 
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