Welcome

 

Welcome to the official website of the European High Pressure Research Group (EHPRG).

EHPRG is non-profitable academic association established in 1963 which is devoted to science and technology of matter under high pressure. It organizes an annual meeting which brings together hundreds of scientists of various fields, mainly physics, chemistry, Earth and planetary sciences, bio- and food science and technology.

The reasonable size of the group, low conference fees, and a friendly relationship between the attendants have made EHPRG meetings a major event in the European high-pressure community for more than half a century.

Immediate past EHPRG Meeting

 


The Joint 28th AIRAPT and 60th EHPRG International Conference on High Pressure Science and Technology (AIRAPT-2023) took place in Edinburgh, UK, at the Edinburgh International Conference Centre (EICC), from July 23-28, 2023.
Immediately prior to AIRAPT/EHPRG, from the 19th to 23rd of July 2023, a Summer School had taken place, also based in Edinburgh, with accommodation provided in University Halls of Residence. The School was aimed at young researchers, and experimentalists wanting a grounding in theory and vice versa.
For more information, please visit the official webpage of AIRAPT-23.

High-pressure in the headlines

 

Selection of high-pressure related titles from top scientific journals.

    Fracturing and tectonic stress drives ultrarapid magma flow into dikes | Science
    Many examples of exposed giant dike swarms can be found where lateral magma flow exceeded hundreds of kilometers. We show that massive magma flow into dikes can be established with only modest overpressure in a magma body, if a large enough pathway opens ...
    8 Feb 2024 at 3:01pm

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    Smectic and Soap Bubble Optofluidic Lasers
    by Zala Korenjak and Matjaž Humar
    Author(s): Zala Korenjak and Matjaž Humar

    Using a soap bubble, researchers have created a laser that could act as a sensitive sensor for environmental parameters including atmospheric pressure.


    [Phys. Rev. X 14, 011002] Published Fri Jan 05, 2024
    5 Jan 2024 at 11:00am
    Optimality Pressures toward Lateralization of Complex Brain Functions
    by Luís F. Seoane
    Author(s): Luís F. Seoane

    A mathematical model shows how increased intricacy of cognitive tasks can break the mirror symmetry of the brain’s neural network.


    [Phys. Rev. X 13, 031028] Published Wed Sep 13, 2023
    13 Sep 2023 at 12:00pm
    Colloquium: Room temperature superconductivity: The roles of theory and materials design
    by Warren E. Pickett
    Author(s): Warren E. Pickett

    Superconductivity, discovered in 1911 and first theoretically understood in 1957, remains a fascinating phenomenon for reasons both fundamental and applied. Reliably calculating the critical temperature of a given material, and even more so predicting it, turned out to be a considerable challenge. This Colloquium explains how theoretical developments have led to increasingly reliable predictions that have culminated in the discovery of the hydride materials that display superconductivity under high pressure at temperatures just shy of room temperature.


    [Rev. Mod. Phys. 95, 021001] Published Fri Apr 07, 2023
    7 Apr 2023 at 12:00pm
    Electronic structure of nitrogen-doped lutetium hydrides
    by Adam Denchfield, Hyowon Park, and Russell J. Hemley
    Author(s): Adam Denchfield, Hyowon Park, and Russell J. Hemley

    Hydrides at high pressures constitute the only materials to be superconducting above 200 K, and are typically marked by an appreciable hydrogen density of states and van Hove singularities at the Fermi energy. Given the recent interest in nitrogen-doped lutetium hydride, the authors focused on finding the structures which would have electronic properties that could plausibly support high-temperature superconductivity within a narrow pressure range. They have identified a narrow range of stoichiometries Lu8H23−xN with hydrogen-dominant conduction states, and found one structure which exhibits a very large hydrogen density of states with an extremely sharp van Hove singularity, whose properties may therefore change dramatically under pressure.


    [Phys. Rev. Materials 8, L021801] Published Fri Feb 16, 2024
    16 Feb 2024 at 11:00am
    High-pressure effects on structural, magnetic, and vibrational properties of van der Waals antiferromagnet ${\mathrm{MnPS}}_{3}$
    by D. P. Kozlenko, O. N. Lis, N. T. Dang, M. Coak, J.-G. Park, E. V. Lukin, S. E. Kichanov, N. O. Golosova, I. Yu. Zel, and B. N. Savenko
    Author(s): D. P. Kozlenko, O. N. Lis, N. T. Dang, M. Coak, J.-G. Park, E. V. Lukin, S. E. Kichanov, N. O. Golosova, I. Yu. Zel, and B. N. Savenko

    The crystal structure, vibrational spectra, and magnetic structure of quasi-two-dimensional layered van der Waals material ${\mathrm{MnPS}}_{3}$ were studied using x-ray diffraction and Raman spectroscopy at high pressures up to 28 GPa, and neutron diffraction up to 3.6 GPa, respectively. A structur…


    [Phys. Rev. Materials 8, 024402] Published Tue Feb 06, 2024
    6 Feb 2024 at 11:00am
    Pressure-induced loss of metallicity in ${\mathrm{RuO}}_{2}$
    by Melanie White, Daniel Schacher, G. Alexander Smith, Dean Smith, Changyong Park, Keith V. Lawler, and Ashkan Salamat
    Author(s): Melanie White, Daniel Schacher, G. Alexander Smith, Dean Smith, Changyong Park, Keith V. Lawler, and Ashkan Salamat

    The density evolution of the physical properties of the transition-metal oxide ${\mathrm{RuO}}_{2}$ coupled with a deeper understanding of underlying metastable phases is necessary for correlating universality between similar binary systems. Here, we report the pressure-temperature electrical resist…


    [Phys. Rev. Materials 8, 013603] Published Tue Jan 16, 2024
    16 Jan 2024 at 11:00am
    Kondo volume collapse in frustrated antiferromagnet: The case of ${\mathrm{Ce}}_{2}{\mathrm{Pd}}_{2}\mathrm{In}$
    by Petr Král, Ladislav Havela, Daniel Staško, Dominik Daisenberger, Milan Klicpera, Martin Diviš, Inés Puente-Orench, Petr Proschek, Jiří Kaštil, Milan Dopita, and Jiří Prchal
    Author(s): Petr Král, Ladislav Havela, Daniel Staško, Dominik Daisenberger, Milan Klicpera, Martin Diviš, Inés Puente-Orench, Petr Proschek, Jiří Kaštil, Milan Dopita, and Jiří Prchal

    ${\mathrm{Ce}}_{2}{\mathrm{Pd}}_{2}\mathrm{In}$ (${\mathrm{Mo}}_{2}\mathrm{Fe}{\mathrm{B}}_{2}$-type of crystal structure) with the ferromagnetic ground state based on $\text{Ce-}4{f}^{1}$ states exhibits two distinct phases of pressure-driven destruction of magnetic order. For pressures up to 3 GPa…


    [Phys. Rev. Materials 8, 014401] Published Wed Jan 03, 2024
    3 Jan 2024 at 11:00am
    Pairing symmetries of multiple superconducting phases in ${\mathrm{UTe}}_{2}$: Competition between ferromagnetic and antiferromagnetic fluctuations
    by Jushin Tei, Takeshi Mizushima, and Satoshi Fujimoto
    Author(s): Jushin Tei, Takeshi Mizushima, and Satoshi Fujimoto

    The putative spin-triplet superconductor ${\mathrm{UTe}}_{2}$ exhibits multiple superconducting phases under applied pressure [Braithwaite et al., Commun. Phys. 2, 147 (2019)]. The clarification of pairing mechanisms and symmetries of gap functions are essentially important for understanding the mu…


    [Phys. Rev. B 109, 064516] Published Thu Feb 22, 2024
    22 Feb 2024 at 11:00am
    Structural diversity of molecular nitrogen on approach to polymeric states
    by Alexander F. Goncharov, Iskander G. Batyrev, Elena Bykova, Lukas Brüning, Huawei Chen, Mohammad F. Mahmood, Andew Steele, Nico Giordano, Timofey Fedotenko, and Maxim Bykov
    Author(s): Alexander F. Goncharov, Iskander G. Batyrev, Elena Bykova, Lukas Brüning, Huawei Chen, Mohammad F. Mahmood, Andew Steele, Nico Giordano, Timofey Fedotenko, and Maxim Bykov

    Nitrogen represents an archetypal example of material exhibiting a pressure-driven transformation from molecular to polymeric state. Detailed investigations of such transformations are challenging because of a large kinetic barrier between molecular and polymeric structures, making the transformatio…


    [Phys. Rev. B 109, 064109] Published Wed Feb 21, 2024
    21 Feb 2024 at 11:00am
    Martensitic and room-temperature magnetocaloric properties of Mn-rich Mn-Ni-Sn Heusler alloys: Experiment and theory
    by Jyoti Sharma, A. A. Coelho, K. G. Suresh, and Aftab Alam
    Author(s): Jyoti Sharma, A. A. Coelho, K. G. Suresh, and Aftab Alam

    Here, we study the effect of external pressure on martensitic transition, magnetic, and magnetocaloric properties of Mn-rich ${\mathrm{Mn}}_{50}{\mathrm{Ni}}_{\text{41-}x}{\mathrm{Sn}}_{\text{9}+x}$ $(x=\mathrm{0} \mathrm{and} 2)$ Heusler alloys by using a combined experimental and first principles …


    [Phys. Rev. B 109, 064418] Published Wed Feb 21, 2024
    21 Feb 2024 at 11:00am
    Pressure-induced superconductivity and enhanced optoelectronic property in the ternary pentagonal semiconductor PdPSe
    by Nixian Qian, Zheng Chen, Yonghui Zhou, Liangyu Li, Chunhua Chen, Shuyang Wang, Ranran Zhang, Xuliang Chen, Chao An, Ying Zhou, Min Zhang, Xiaoping Yang, and Zhaorong Yang
    Author(s): Nixian Qian, Zheng Chen, Yonghui Zhou, Liangyu Li, Chunhua Chen, Shuyang Wang, Ranran Zhang, Xuliang Chen, Chao An, Ying Zhou, Min Zhang, Xiaoping Yang, and Zhaorong Yang

    The ternary van der Waals (vdW) pentagonal semiconductor PdPSe has gathered significant attention due to its unique anisotropic structure and exotic optoelectronic properties originating from the distinct Cairo pentagonal tiling topology. Here, we report pressure tuning of the photoelectronic and el…


    [Phys. Rev. B 109, 054517] Published Tue Feb 20, 2024
    20 Feb 2024 at 11:00am
    Pressure-induced surface superconductivity in the noncentrosymmetric superconductor ${\mathrm{PbTaSe}}_{2}$: Pressure-dependent point-contact Andreev spectroscopy
    by Hai Zi, Yu-qing Zhao, Ming-chong He, Yu-jia Long, Lin-xiao Zhao, Xing-yuan Hou, Huan-xing Yang, Yi-feng Yang, Lei Shan, Zhi-an Ren, Jian-qi Li, Jiang-ping Hu, Geng-fu Chen, Peng Xiong, and Cong Ren
    Author(s): Hai Zi, Yu-qing Zhao, Ming-chong He, Yu-jia Long, Lin-xiao Zhao, Xing-yuan Hou, Huan-xing Yang, Yi-feng Yang, Lei Shan, Zhi-an Ren, Jian-qi Li, Jiang-ping Hu, Geng-fu Chen, Peng Xiong, and Cong Ren

    A notable characteristic of ${\mathrm{PbTaSe}}_{2}$, a prototypical noncentrosymmetric superconductor (NCS), is that its superconductivity can be modulated through a structural transition under hydrostatic pressure [Kaluarachchi et al. Phys. Rev. B 95, 224508 (2017)]. Here we report on a combined p…


    [Phys. Rev. B 109, 064510] Published Tue Feb 20, 2024
    20 Feb 2024 at 11:00am
    High-pressure synthesis of half-doped perovskites MnV0.5Nb0.5O3 and MnV0.5Ta0.5O3 with unusual A-site small Mn2+ cations
    by Xun KangHiroaki HayashiAlexei A. BelikYoshihiro TsujimotoKazunari Yamauraa Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japanb Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido, Japan
    Volume 44, Issue 1, March 2024, Page 25-37
    .

    21 Nov 2023 at 6:09am
    Scintillator efficiency enhancement potential consequent to the pressure-dependent electronic, optical and elastic properties of CaI2: first-principles calculations
    by Pradeep KumarAgnikumar G. Vedeshwara Department of Physics, Hansraj College, University of Delhi, Delhi, Indiab Thin Film Laboratory, Department of Physics & Astrophysics, University of Delhi, Delhi, India
    Volume 44, Issue 1, March 2024, Page 69-83
    .

    2 Feb 2024 at 7:12am
    Simultaneous compression of NaCl, Au, and ruby: toward mutually consistent pressure scales
    by Yanbin WangGuoyin ShenJesse S. Smitha Center for Advanced Radiation Sources, The University of Chicago, Argonne, IL, USAb HPCAT, X-Ray Science Division, Argonne National Laboratory, Argonne, IL, USA
    Volume 44, Issue 1, March 2024, Page 53-68
    .

    9 Jan 2024 at 3:57am