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.
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The deep sea is a globally connected habitat
Nature, Published online: 23 July 2025; doi:10.1038/d41586-025-02286-3
The deep sea is a distinctive environment, distinguished from surface waters by darkness, cold and immense pressures. Global data reveal how much more connected deep-sea life is than life in the shallows; a deep-sea animal has spread from Iceland to Tasmania, Australia, over a relatively short evolutionary time period.23 Jul 2025 at 12:00am
Expedient access to methylamine with potential
by Tristan von Münchow
Nature Chemistry, Published online: 22 July 2025; doi:10.1038/s41557-025-01877-x
Traditional methylamine synthesis from methanol and ammonia relies on high-temperature and high-pressure reaction conditions, resulting in byproducts and challenging purification. Now, electrochemical nitromethane reduction under mild conditions has been realized with a copper catalyst, enabling selective and sustainable methylamine synthesis.22 Jul 2025 at 12:00am
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Pressure-Driven Moiré Potential Enhancement and Tertiary Gap Opening in Graphene/h-BN Heterostructure
by Yupeng Wang, Jiaqi An, Chunhui Ye, Xiangqi Wang, Di Mai, Hongze Zhao, Yang Zhang, Chiyu Peng, Kenji Watanabe, Takashi Taniguchi, Xiaoyu Sun, Rucheng Dai, Zhongping Wang, Wei Qin, Zhenhua Qiao, and Zengming Zhang
Author(s): Yupeng Wang, Jiaqi An, Chunhui Ye, Xiangqi Wang, Di Mai, Hongze Zhao, Yang Zhang, Chiyu Peng, Kenji Watanabe, Takashi Taniguchi, Xiaoyu Sun, Rucheng Dai, Zhongping Wang, Wei Qin, Zhenhua Qiao, and Zengming Zhang
Pressure serving as a universal knob to dynamically amplify moiré potential strength allows for the observation of a pressure-activated tertiary gap in graphene/h-BN.

[Phys. Rev. Lett. 135, 046303] Published Thu Jul 24, 2025
24 Jul 2025 at 12:00pm
Three-Dimensional Helical-Rotating Plasma Structures in Beam-Generated Partially Magnetized Plasmas
by Jian Chen, Andrew T. Powis, Igor D. Kaganovich, Zhibin Wang, and Yi Yu
Author(s): Jian Chen, Andrew T. Powis, Igor D. Kaganovich, Zhibin Wang, and Yi Yu
Azimuthal structures emerging in beam-generated partially magnetized plasmas are investigated using three-dimensional particle in cell-Monte Carlo collision simulations. Two distinct instability regimes are identified at low pressures. When the gas pressure is sufficiently high, quasineutrality is a…
[Phys. Rev. Lett. 135, 045301] Published Wed Jul 23, 2025
23 Jul 2025 at 12:00pm
Enhanced Superconducting Gap in the Outer ${\mathrm{CuO}}_{2}$ Plane of the Trilayer Cuprate $(\mathrm{Hg},\text{ }\mathrm{Re}){\mathrm{Ba}}_{2}{\mathrm{Ca}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{8+δ}$
by M. Horio, M. Miyamoto, Y. Mino, S. Ishida, B. Thiagarajan, C. M. Polley, C. H. Lee, T. Nishio, H. Eisaki, and I. Matsuda
Author(s): M. Horio, M. Miyamoto, Y. Mino, S. Ishida, B. Thiagarajan, C. M. Polley, C. H. Lee, T. Nishio, H. Eisaki, and I. Matsuda
The material with the highest-temperature superconductivity at ambient pressure has received less attention than its easier-to-prepare relatives—until now.

[Phys. Rev. Lett. 135, 046501] Published Tue Jul 22, 2025
22 Jul 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
Author(s): 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.

[Phys. Rev. X 15, 021075] Published Fri May 30, 2025
30 May 2025 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
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
Author(s): 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…
[Phys. Rev. Materials 9, 073609] Published Thu Jul 24, 2025
24 Jul 2025 at 12:00pm
Slip-dominated structural transitions
by Kanka Ghosh, Oğuz Umut Salman, Sylvain Queyreau, and Lev Truskinovsky
Author(s): 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.

[Phys. Rev. Materials 9, 073604] Published Mon Jul 07, 2025
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
Author(s): 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…
[Phys. Rev. Materials 9, 073601] Published Tue Jul 01, 2025
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
Author(s): 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…
[Phys. Rev. Materials 9, 064413] Published Thu Jun 26, 2025
26 Jun 2025 at 12:00pm
Phase stability of materials in sodium-rich silicates at high pressure
by Haoyu Wang, Wenwen Cui, Jian Hao, Jingming Shi, and Yinwei Li
Author(s): Haoyu Wang, Wenwen Cui, Jian Hao, Jingming Shi, and Yinwei Li
Sodium (Na), silicon (Si), and oxygen (O) are main abundant elements to form the minerals inside the Earth's interior. Here, combining first-principles calculations and crystal structural prediction methods, we propose the formation of a distinct stoichiometry, ${\mathrm{Na}}_{6}{\mathrm{SiO}}_{5}$,…
[Phys. Rev. Materials 9, 063603] Published Fri Jun 06, 2025
6 Jun 2025 at 12:00pm
Dynamics of the transition from the metastable tetragonal st12 to the diamond-cubic phase in germanium characterized by neutron spectroscopy
by B. Haberl, M.-E. Donnelly, L. Pineda, V. Ladygin, and G. E. Granroth
Author(s): B. Haberl, M.-E. Donnelly, L. Pineda, V. Ladygin, and G. E. Granroth
The complex phase diagram of germanium allows for exotic crystalline phases recoverable from high pressure. Among these, the tetragonal st12 phase is unusual as it shares characteristics with amorphous Ge resulting in desirable band-gap characteristics. Here, we leverage a high neutron flux and larg…
[Phys. Rev. B 112, 014113] Published Thu Jul 24, 2025
24 Jul 2025 at 12:00pm
Optical spectroscopy evidence of a second-order Mott phase transition
by Ariano De Giovanni Rodrigues, Andrea Perucchi, Luca Tomarchio, Marine Verseils, Paraskevas Parisiades, Benoît Baptiste, Keevin Béneut, Edmondo Gilioli, Stefano Lupi, and Andrea Gauzzi
Author(s): Ariano De Giovanni Rodrigues, Andrea Perucchi, Luca Tomarchio, Marine Verseils, Paraskevas Parisiades, Benoît Baptiste, Keevin Béneut, Edmondo Gilioli, Stefano Lupi, and Andrea Gauzzi
By means of Raman scattering and infrared reflectivity spectroscopies under high pressure, we investigate the metallic phase induced by pressure at ${P}_{cr}=17.5$ GPa in the Mott insulator $({\mathrm{NaMn}}_{3}){\mathrm{Mn}}_{4}{\mathrm{O}}_{12}$ (NMO). Upon approaching ${P}_{cr}$, two signatures o…
[Phys. Rev. B 112, 035161] Published Wed Jul 23, 2025
23 Jul 2025 at 12:00pm
Observation of topological surface states and pressure-induced superconductivity in the Van der Waals crystal $\mathrm{ZrTiT}{\mathrm{e}}_{4}$
by Wei Zhou, Jingwei Zhang, Heping Li, Z. H. Quan, X. Z. Xing, Z. Y. Zhang, Y. L. Huang, J. J. Feng, Xiaofeng Xu, Jincheng Zhuang, B. Qian, and Yi Du
Author(s): Wei Zhou, Jingwei Zhang, Heping Li, Z. H. Quan, X. Z. Xing, Z. Y. Zhang, Y. L. Huang, J. J. Feng, Xiaofeng Xu, Jincheng Zhuang, B. Qian, and Yi Du
Tuning superconductivity in topological materials has been identified as a promising pathway for achieving topological superconductivity, which could accelerate advancements in topological quantum computation. Ternary transition-metal chalcogenides ${ABX}_{4}$ (where $A/B$ = Zr, Hf, or Ti; $X$ = Te)…
[Phys. Rev. B 112, 045138] Published Wed Jul 23, 2025
23 Jul 2025 at 12:00pm
Influence of diameter on high-pressure induced phase transitions in bismuth nanowire networks
by Christopher Schröck, Ioannis Tzifas, Kay-Obbe Voss, Michael F. P. Wagner, Christina Trautmann, Lkhamsuren Bayarjargal, Dominik Spahr, Björn Winkler, and Maria Eugenia Toimil-Molares
Author(s): Christopher Schröck, Ioannis Tzifas, Kay-Obbe Voss, Michael F. P. Wagner, Christina Trautmann, Lkhamsuren Bayarjargal, Dominik Spahr, Björn Winkler, and Maria Eugenia Toimil-Molares
Size-dependent behavior of bismuth nanowire networks under high-pressure conditions was investigated at room temperature. Three-dimensional networks of freestanding interconnected bismuth nanowires with diameters between 34 and $85\phantom{\rule{0.16em}{0ex}}\mathrm{n}\mathrm{m}$ were synthesized by…
[Phys. Rev. B 112, 014111] Published Tue Jul 22, 2025
22 Jul 2025 at 12:00pm
Pressure-driven superconductivity in the topological insulator ${\mathrm{GeBi}}_{4}{\mathrm{Te}}_{7}$
by Yalei Huang, Na Zuo, Zheyi Zhang, Chunqiang Xu, Xiangzhuo Xing, Wen-He Jiao, Bin Li, Wei Zhou, Xiaobing Liu, Dong Qian, and Xiaofeng Xu
Author(s): Yalei Huang, Na Zuo, Zheyi Zhang, Chunqiang Xu, Xiangzhuo Xing, Wen-He Jiao, Bin Li, Wei Zhou, Xiaobing Liu, Dong Qian, and Xiaofeng Xu
The van der Waals pseudobinary chalcogenides ${(ACh)}_{m}{(P{n}_{2}C{h}_{3})}_{n}$ ($A=\mathrm{Ge},\mathrm{Mn},\mathrm{Pb},\mathrm{etc}.$; $Pn=\mathrm{Sb}\phantom{\rule{0.28em}{0ex}}\mathrm{or}\phantom{\rule{0.28em}{0ex}}\mathrm{Bi}$; $Ch=\mathrm{Te},\mathrm{Se}$) have recently been reported to host…
[Phys. Rev. B 112, 014515] Published Tue Jul 22, 2025
22 Jul 2025 at 12:00pm
Dimensional crossover and emergence of novel phases in puckered ${\text{PdSe}}_{2}$ under pressure
by Tanima Kundu, Soumik Das, Koushik Dey, Boby Joseph, Chumki Nayak, Mainak Palit, Sanjoy Kr Mahatha, Kapildeb Dolui, and Subhadeep Datta
Author(s): Tanima Kundu, Soumik Das, Koushik Dey, Boby Joseph, Chumki Nayak, Mainak Palit, Sanjoy Kr Mahatha, Kapildeb Dolui, and Subhadeep Datta
We investigate the pressure-driven structural and electronic evolution of ${\mathrm{PdSe}}_{2}$ using powder x-ray diffraction, Raman spectroscopy, and first-principles calculations. Beyond 2.3 GPa, suppression of the Jahn-Teller distortion induces in-plane lattice expansion and metallization. Aroun…
[Phys. Rev. B 112, 024109] Published Tue Jul 22, 2025
22 Jul 2025 at 12:00pm
Melting curve of tin to 61 GPa: Resolving discrepancies through shock experiments and simulations
by Lixin Liu, Hao Wang, Jian Wu, Tao Xue, Yi Sun, Shenggang Liu, Shijia Ye, Long Hao, Huayun Geng, and Jun Li
Author(s): Lixin Liu, Hao Wang, Jian Wu, Tao Xue, Yi Sun, Shenggang Liu, Shijia Ye, Long Hao, Huayun Geng, and Jun Li
Tin (Sn), a well-known element intensively studied for its multiple structural transformations under pressure, exhibits unclear high-pressure melting behavior with limited dynamic experimental data. This study combines shock compression experiments using lithium fluoride (LiF) and magnesium oxide (M…
[Phys. Rev. B 112, 024110] Published Tue Jul 22, 2025
22 Jul 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
Volume 45, Issue 2, June 2025, Page 181-194
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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
Volume 45, Issue 2, June 2025, Page 151-161
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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
Volume 45, Issue 2, June 2025, Page 162-169
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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
Volume 45, Issue 2, June 2025, Page 170-180
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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
Volume 45, Issue 2, June 2025, Page 124-136
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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
Volume 45, Issue 2, June 2025, Page 109-123
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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
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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
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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
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14 Jul 2025 at 7:17am