Institute of High Pressure Physics

Dnia 11 października 2023 r. (środa) o godz. 14:30 w sali seminaryjnej Instytutu Wysokich Ciśnień Polskiej Akademii Nauk w Warszawie, ul. Sokołowska 29/37, odbędzie się publiczna obrona rozprawy doktorskiej mgr. Ashfaqa Ahmada.

Temat rozprawy: „Phenomena related to charge distribution in nitride heterostructures and their quantitative determination using density functional theory”

Pełna treść zawiadomienia

Rozprawa doktorska i recenzje dostępne są na stronie BIP IWC PAN

With great sorrow, we announce the passing away of Jean-Louis Robert, retired professor of physics at the University of Montpellier and our longtime Friend, on September 7th. Professor Robert's professional career was closely associated with research on semiconductor materials, ranging from fundamental studies to practical applications. The close connection between research and applications was of particular importance to Professor Robert and led to the practical utilization of the results of the basic research in the industry.

Holy Mass for the deceased prof. Robert will be celebrated on September 29, 2023 at 3:00 p.m. in the church of St. Wojciech in Wola

The research team of Dr. Singh from NL-6 Laboratory of Superconductors has recently published two interesting publications on iron-based superconductors (FBS); both in an open access journal Materials (Impact factor 3.4).

In the first paper, the effect of cometal addition has been studied and reported for FBS at ambient pressure, where the enhancement of the superconducting transition (T_c) and critical current (J_c) properties were observed due to the improvement of the intergrain connections and pinning centres. This paper is published by M. Manasa, M. Azam, T. Zajarniuk, R. Diduszko, T. Cetner, A. Morawski, A. Wiśniewski, and Shiv J. Singh entitled “Cometal Addition Effect on Superconducting Properties and Granular Behaviours of Polycrystalline FeSe_0.5Te_0.5” (Materials 16, 2892 (2023)  https://doi.org/10.3390/ma16072892).

In the second work, optimization of Fe(Se,Te) physical properties was carried out utilizing the high gas pressure and high-temperature approach (HP-HTS). In comparison to the ambient pressure approach, HP-HTS under optimal growth conditions significantly improved the critical current density, the pinning properties, and the transition temperature. This study demonstrates that the high-pressure synthesis method can be a novel approach to studying FBS materials in order to improve sample quality, achieve further superconducting property enhancements, and advance the development of their magnetic applications, particularly for superconducting wires and tapes. This paper is published by M. Azam, M. Manasa, T. Zajarniuk, R. Diduszko, T. Cetner, A. Morawski, J. Więckowski, A. Wiśniewski, and Shiv J. Singh entitled “High-Pressure Synthesis and the Enhancement of the Superconducting Properties of FeSe_0.5Te_0.5” (Materials 16, 5358 (2023) https://doi.org/10.3390/ma16155358).

Note that this is EDITOR's CHOICE ARTICLE, selected by Editors to be particularly interesting to readers and important in the respective research area.

Fig. The variation of hexagonal phase (H), room temperature resistivity (ρ_300K), Residual resistivity ratio (RRR), the onset transition temperature (T_c^onset), transition width (ΔT) and critical current density (J_c) with synthesis pressure.