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.

Global pandemic agreement needs sustained pressure to succeed

by WooJung Jon

Nature, Published online: 01 July 2025; doi:10.1038/d41586-025-02078-9

1 Jul 2025 at 12:00am

Migrating shallow slow slip on the Nankai Trough megathrust captured by borehole observatories | Science

26 Jun 2025 at 3:01pm

How surface charges affect interdroplet freezing

by Siyan YangBingqiang JiYawei FengYuankai JinWanghuai XuJingyi LuXuezhi QinHuanhuan ZhangMingyu LiZhenyu XuXiaonan LiuLuqing XuDehui WangRongfu WenZhenying WangSteven WangXuehu MaZuankai WangaDepartment of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, ChinabDepartment of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, ChinacDepartment of Aerospace Propulsion, School of Astronautics, Beihang University, Beijing 100191, ChinadInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, ChinaeState Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, ChinafDepartment of Aeronautics and Astronautics, Kyushu University, Fukuoka 8190395, Japan

18 Jun 2025 at 9:00am

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Neural Canonical Transformations for Quantum Anharmonic Solids of Lithium

by Qi Zhang, Xiaoyang Wang, Rong Shi, Xinguo Ren, Han Wang, and Lei Wang

Lithium is a typical quantum solid, characterized by cubic structures at ambient pressure. As the pressure increases, it forms more complex structures and undergoes a metal-to-semiconductor transformation, complicating theoretical and experimental analyses. We employ the neural canonical transformat…

20 Jun 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

Superconductivity in Trilayer Nickelate ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$ under Pressure

by Mingxin Zhang et al.

The emergence of superconductivity in the Ruddlesden-Popper phase nickelate La4Ni3O10 around 25 K under high pressure opens new search avenues for unconventional superconductivity in bulk materials.

4 Apr 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

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

Phase stability of materials in sodium-rich silicates at high pressure

by 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, ${\mathrm{Na}}_{6}{\mathrm{SiO}}_{5}$,…

6 Jun 2025 at 12:00pm

Fully thermal meta-GGA exchange correlation free-energy density functional

by Katerina P. Hilleke, Valentin V. Karasiev, S. B. Trickey, R. M. N. Goshadze, and S. X. Hu

Warm dense matter (WDM) is the materials regime that bridges condensed matter and plasmas that occurs in giant-planet centers and the state trajectory of inertial confinement fusion experiments. Predictive density functional theory simulations of WDM must use an explicitly temperature-dependent free-energy exchange-correlation functional. Incorporating thermal effects at the meta-GGA level of refinement, the newly developed fully thermal fTSCAN functional provides high accuracy across the entire temperature and pressure range from ambient to extreme conditions. Tests on model systems highlight the contributions of thermal and density inhomogeneity effects, while molecular dynamics simulations demonstrate accuracy for materials ranging from water under ambient conditions to dense hydrogen at a wide range of temperatures.

27 May 2025 at 12:00pm

High-pressure floating zone crystal growth of ${\text{Sr}}_{2}{\text{IrO}}_{4}$

by Steven J. Gomez Alvarado, Yiming Pang, Pedro A. Barrera, Dibyata Rout, Claudia Robison, Zach Porter, Hanna Z. Porter, Erick A. Lawrence, Euan N. Bassey, and Stephen D. Wilson

Here we demonstrate the floating zone crystal growth of the ${J}_{\mathrm{eff}}=1/2$ Mott insulator ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$. Historically, the growth of iridates from a ternary melt has been precluded by the extreme vapor pressure of the metal oxide species and the difficulty of mainta…

16 May 2025 at 12:00pm

Near-room-temperature ferromagnetic ordering in the pressure-induced collapsed-tetragonal phase in $\mathrm{SrC}{\mathrm{o}}_{2}{\mathrm{P}}_{2}$

by S. Huyan, J. Schmidt, A. Valadkhani, H. Wang, Z. Li, A. Sapkota, J. L. Petri, T. J. Slade, R. A. Ribeiro, W. Bi, W. Xie, I. I. Mazin, R. Valenti, S. L. Bud'ko, and P. C. Canfield

We present high-pressure electrical transport, magnetization, and single-crystal x-ray diffraction data on $\mathrm{SrC}{\mathrm{o}}_{2}{\mathrm{P}}_{2}$ single crystals, revealing a transition from the uncollapsed tetragonal (ucT) to the collapsed tetragonal (cT) phase >∼10 GPa. This structural …

1 Jul 2025 at 12:00pm

Modulation of superconductivity and superhardness in $X{\mathrm{B}}_{4}{\mathrm{C}}_{4} (X=\mathrm{Be},\mathrm{B},\mathrm{Al},\mathrm{Si},\mathrm{P}, \text{and} \mathrm{Ti})$ borocarbides at ambient pressure

by Qiwen Jiang, Zihao Huo, Zhengtao Liu, Ling Chen, Tiancheng Ma, Shuqing Jiang, Defang Duan, and Tian Cui

Diamond and its doped materials have garnered widespread attention for their potential applications in superconductivity and superhardness. Here we introduce a class of heavily boron-doped diamond, $X{\mathrm{B}}_{4}{\mathrm{C}}_{4} (X=\mathrm{Be},\mathrm{B},\mathrm{Al},\mathrm{Si},\mathrm{P},\mathr…

30 Jun 2025 at 12:00pm

Evidence of a Kondo lattice quantum critical point and of non-Fermi liquid behavior in the intercalated layered system ${\mathrm{V}}_{5}{\mathrm{S}}_{8}$

by Hancheng Yang, Hicham Moutaabbid, Benoît Baptiste, David Hrabovsky, Andrea Gauzzi, and Yannick Klein

By means of a specific heat, susceptibility, and high-pressure electrical resistivity study, we show that the local magnetic moments of the intercalated V ions in ${\mathrm{V}}_{5}{\mathrm{S}}_{8}$ realize a prototype of Kondo lattice system, where an antiferromagnetic order of the moments coexists …

30 Jun 2025 at 12:00pm

Efficient first-principles approach to Gibbs free energy with thermal expansion

by Kota Hashimoto, Tomonori Tanaka, and Yoshihiro Gohda

We propose a method to evaluate the Gibbs free energy from constant-volume first-principles phonon calculations. The volume integral of the pressure is performed by determining the volume and the bulk modulus in equilibrium at finite temperatures, where the pressure and its volume derivative are eva…

27 Jun 2025 at 12:00pm

Effective $K$-valley Hamiltonian for transition metal dichalcogenide bilayers under pressure and application to twisted bilayers with pressure-induced topological phase transitions

by Miftah Hadi Syahputra Anfa, Sabri Elatresh, Hocine Bahlouli, and Michael Vogl

Motivated by recent studies on topologically nontrivial moiré bands in twisted bilayer transition metal dichalcogenides (TMDs), we study ${\mathrm{MoTe}}_{2}$ bilayer systems subject to pressure, which is applied perpendicular to the material surface. We start our investigation by first considering …

26 Jun 2025 at 12:00pm

Deep variational free energy prediction of dense hydrogen solid at 1200 K

by Xinyang Dong, Hao Xie, Yixiao Chen, Wenshuo Liang, Linfeng Zhang, Lei Wang, and Han Wang

We perform deep variational free-energy calculations to investigate the dense hydrogen system at 1200 K and high pressures. In this computational framework, neural networks are used to model the free energy through the proton Boltzmann distribution and the electron wave function. By directly minimiz…

25 Jun 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

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