EHPRG: The European High Pressure Research Group

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.

Upcoming EHPRG Meeting

The 62nd EHPRG Meeting will take place in Manchester, UK, at the Lowry, in the period August 31-September 5, 2025.
The conference will be chaired by John Proctor, Salford University, UK.
For more information, please visit the official webpage of EHPRG-62.

Immediate past EHPRG Meetings

The 61st EHPRG Meeting has taken place in Thessaloniki, Greece, at the Porto Palace Hotel, in the period September 1-6, 2024.
The conference has been chaired by John Arvanitidis and Dimitris Christofilos, Aristotle University of Thessaloniki.
For more information, please visit the official webpage of EHPRG-61.

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.
A photo album is available on the AIRAPT website.
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.

Can creativity in science be learnt? These researchers think so

by Esme Hedley

Nature, Published online: 08 August 2025; doi:10.1038/d41586-025-01913-3

8 Aug 2025 at 12:00am

Unprecedentedly high global forest disturbance due to fire in 2023 and 2024

by Peter PotapovAlexandra TyukavinaSvetlana TurubanovaMatthew C. HansenLouis GiglioAndres Hernandez-SernaAndré LimaNancy HarrisFred StolleaDepartment of Geographical Sciences, University of Maryland, College Park, MD 20740bWorld Resources Institute, Washington, DC 20002

21 Jul 2025 at 9:00am

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Cold Self-Lubrication of Sliding Ice

by Achraf Atila, Sergey V. Sukhomlinov, and Martin H. Müser

The low kinetic friction between ice and numerous counterbodies is commonly attributed to an interfacial water layer, which is believed to originate from preexisting surface water or from melt water induced by high contact pressures or frictional heat. However, even the currently leading theory of f…

7 Aug 2025 at 12:00pm

Incommensurate Antiferromagnetism in ${\mathrm{UTe}}_{2}$ under Pressure

by W. Knafo, T. Thebault, S. Raymond, P. Manuel, D. D. Khalyavin, F. Orlandi, E. Ressouche, K. Beauvois, G. Lapertot, K. Kaneko, D. Aoki, D. Braithwaite, and G. Knebel

Neutron diffraction reveals that superconductivity in UTe2 emerges near an incommensurate antiferromagnetic phase under pressure, pointing to antiferromagnetic—rather than ferromagnetic—correlations as a key driving force.

30 May 2025 at 12:00pm

Colloquium: Room temperature superconductivity: The roles of theory and materials design

by 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.

7 Apr 2023 at 12:00pm

Thermal and mechanical influences on shear band formation and suppression in shocked 1,3,5-trinitroperhydro-1,3,5-triazine (RDX)

by Brenden W. Hamilton and Timothy C. Germann

High-pressure shear band formation is a critical phenomenon in energetic materials because of its ability to form hotspots and influence mechanical strength. Shear banding is known to occur in a variety of these materials, but the governing dynamics of the mechanisms are not well defined for molecul…

6 Aug 2025 at 12:00pm

Pressure-induced irreversible volume collapse in a high-entropy alloy

by Raimundas Sereika, Caleb M. Knight, Kallol Chakrabarty, Andrew D. Pope, Dean Smith, and Yogesh K. Vohra

At ambient conditions, the high-entropy alloy superconductor $\mathrm{R}{\mathrm{e}}_{0.6}{(\mathrm{NbTiZrHf})}_{0.4}$ exhibits exceptional mechanical properties among high-entropy alloys, with its hexagonal phase achieving nanoindentation hardness of 18.5 GPa. We report on a unique pressure-induced…

24 Jul 2025 at 12:00pm

Slip-dominated structural transitions

by Kanka Ghosh, Oğuz Umut Salman, Sylvain Queyreau, and Lev Truskinovsky

By introducing a novel method of tracking the history of atomic-scale metric tensors in molecular dynamics, the authors uncover hidden micro-slips during pressure-induced square to hexagonal transition. The purely geometrical tessellation of the configurational space of metric tensors creates a possibility to distinguish between elastic and plastic deformations and reveals previously hidden “micro-slips” under “shuffle”, portraying a central role of lattice invariant shears in this class of phase transformation. The discovered slip-dominated mechanism during the square to hexagonal transition contains some generic elements and is expected to be common for most reconstructive transitions including the iconic BCC-HCP and FCC-HCP transitions.

7 Jul 2025 at 12:00pm

Hydrogen-rich hydrate at high pressures up to 104 GPa

by Alexander F. Goncharov, Elena Bykova, Iskander Batyrev, Maxim Bykov, Eric Edmund, Amol Karandikar, Mahmood Mohammad, Stella Chariton, Vitali Prakapenka, Konstantin Glazyrin, Mohamed Mezouar, Gaston Garbarino, and Jonathan Wright

Gas hydrates are considered fundamental building blocks of giant icy planets like Neptune and similar exoplanets. The existence of these materials in the interiors of giant icy planets, which are subject to high pressures and temperatures, depends on their stability relative to their constituent com…

1 Jul 2025 at 12:00pm

Probing the skyrmion phase of MnSi through the field-exponent of the isothermal entropy change

by Tapas Samanta, Chris Taake, and Luana Caron

A detailed study of the field-induced entropy change evolution under hydrostatic pressure ($p$) of the well-known skyrmion-hosting MnSi system was carried with the goal of assessing its magnetocaloric properties and identifying the skyrmion phase. The pressure-induced modification of the first-order…

26 Jun 2025 at 12:00pm

Effective perpendicular electric field as a probe for interlayer pairing in ambient-pressure superconducting ${\mathrm{La}}_{2.85}{\mathrm{Pr}}_{0.15}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ thin films

by Junkang Huang and Tao Zhou

Recent angle-resolved photoemission spectroscopy (ARPES) experiments on ${\mathrm{La}}_{2.85}{\mathrm{Pr}}_{0.15}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ thin films revealed a superconducting gap near the diagonal direction for the ${d}_{{x}^{2}−{y}^{2}}$ orbital, confined to a narrow momentum region. Our…

7 Aug 2025 at 12:00pm

Grüneisen parameter, sound velocity, and shock-induced melting of a Ce-5 wt.% La alloy under dynamic compression up to 100 GPa

by Yun-Jun Gu, Jian-Zhou Zhao, Kai Zhao, Guo-Jun Li, Zhao-Qi Wang, Jia-Xing Gu, and Qi-Feng Chen

Understanding the dynamic response of Ce-La alloys under extreme pressures is critical for unraveling their complex high-pressure behaviors and establishing accurate multiphase equations of states (EOSs). While existing studies focus on pressures below 20 GPa, the shock response at higher pressures …

4 Aug 2025 at 12:00pm

High-pressure polymerization of $cis\text{−}{\mathrm{N}}_{2}{\mathrm{F}}_{2}$ chains

by Guo Chen, Lin Ling, Chengfeng Zhang, Jie Zhang, Gilles Frapper, and Xianlong Wang

Based on first-principles calculations and ab initio molecular-dynamics simulations, the polymerization of the unsaturated cis dinitrogen-difluoride $(cis\text{−}{\mathrm{N}}_{2}{\mathrm{F}}_{2})$ molecular compound is investigated. The thermodynamic, dynamical, and thermal stabilities of the nitrog…

4 Aug 2025 at 12:00pm

Disruption of Lipomyces starkeyi cells grown in hydrolyzed cheese-whey by high pressure homogenization for enhancing lipid extraction

by Ayşe Alara Batıgün Hami Alpas Deniz Cekmecelioglu Department of Food Engineering, Middle East Technical University, Ankara, Turkey

13 Mar 2025 at 11:57am

A new pressure medium, Daphne 7676, with solidification pressure of 5 GPa at 300 K and low melting point of around 110 K at ambient pressure

by K. Murata K. Goto S. Klotz D. Bhoi K. Béneut Y. Uwatoko H. Yoshino S. Aoki a Osaka Metropolitan University, Osaka, Japanb Idemitsu Kosan Co. Ltd, Tokyo, Japanc IMPMC, CNRS UMR 7590, Sorbonne Université, Paris, Franced ISSP, University of Tokyo, Tokyo, Japane Univ. of Electro-Communications, Chofu, Japanf Sorbonne Université, IMPMC, Paris, Franceg Neutron Sci. &Tech. Center (CROSS), Tokai, Ibaraki, Japan

6 Jun 2025 at 8:33am

Electrical properties of GdF3 under high pressure

by Tingjing Hu Kenan Xu Yuanlin Liu Liyun Yan Jingshu Wang Junkai Zhang Xuefei Li Xiaoyan Cui a School of Physics and Electrical Engineering, Jiaying University, Meizhou, People’s Republic of Chinab Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping, People’s Republic of China

10 Jun 2025 at 2:05pm

Accurate, reproducible, and robust detection of phase transformations in alloys subjected to high isostatic pressure and cooling rates

by Stefan Müller Santiago Benito Leonhard Gertlowski Oliver Schenk Christoph Broeckmann Sebastian Weber a Ruhr University Bochum, Chair of Materials Technology, Bochum, Germanyb RWTH Aachen, Institute of Applied Powder Metallurgy and Ceramics, Aachen, Germany

13 Jun 2025 at 1:52pm

Irreversible changes in amorphous C₃N₄ under pressure: loss of chemical order and graphite-like character

by Murat Durandurdu Department of Materials Science and Nanotechnology Engineering, Abdullah Gül University, Kayseri, Türkiye

21 Apr 2025 at 5:23am

The magnetism and elasticity of ϵ-FeOOH across the pressure-induced electronic spin transition

by Osamu Ikeda Tatsuya Sakamaki Takaya Mitsui Kosuke Fujiwara Hiroshi Uchiyama Hiroshi Fukui Daisuke Ishikawa Alfred Q.R. Baron Akio Suzuki a Department of Earth Science, Graduate School of Science, Tohoku University, Sendai, Japanb Kansai Institute for Photon Science, National Institute for Quantum Science and Technology, Sayo, Japanc Japan Synchrotron Radiation Research Institute, Sayo, Japand Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Japan

19 Feb 2025 at 7:57am

High pressure–temperature picosecond acoustic measurements on Fe using an internal-resistive-heated diamond anvil cell

by Yoshihiro Nagaya Takashi Yagi Ryoto Ebina Kei Hirose Manabu Kodama Shuichiro Hirai Kenji Ohta a Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Meguro, Japanb National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Ibaraki, Japanc Department of Earth and Planetary Science, The University of Tokyo, Bunkyo, Japand Department of Mechanical Engineering, Tokyo Institute of Technology, Meguro, Japan

28 Jun 2025 at 8:57am

LiPF6 under pressure: a symmetry-mode-based structural analysis

by C. J. Ridley C. L. Bull N.P. Funnell a Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USAb Rutherford Appleton Laboratories, ISIS Neutron and Muon Source, Harwell, Didcot, UKc School of Chemistry, The University of Edinburgh, Edinburgh, UK

6 Jul 2025 at 8:31am

Synergistic effects of elevated hydrostatic pressure, mild heat, malic acid, and citricidalTM against wild-type, rifampicin-resistant, and pressure-stressed Shiga toxin-producing Escherichia coli

by Niraj Ghimire Ranju Kafle Junice Sibley Sandhya Thapa Aliyar Cyrus Fouladkhah a Public Health Microbiology Laboratory, Food Science Program, Tennessee State University, Nashville, TN, USAb Public Health Microbiology FoundationSM, Franklin, TN, USA

14 Jul 2025 at 7:17am

Pressure-induced phase transition in α-Bi₂O₃: evidence from synchrotron X-ray diffraction and Raman spectroscopy

by Zhenwu Zeng Hailian Hong Can Tian Jiayu Wang a Department of Physics, Faculty of Mechanical and Electrical Engineering, Sanming University, Sanming, People’s Republic of Chinab Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Urumqi, People’s Republic of Chinac State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, People’s Republic of Chinad School of Physics and Optoelectronic Engineering, Hainan University, Haikou, People’s Republic of China

29 Jul 2025 at 9:29am

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