EHPRG

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.

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

Large contribution of antecedent climate to ecosystem productivity anomalies during extreme events
by Jinghao Qiu


Nature Geoscience, Published online: 21 November 2025; doi:10.1038/s41561-025-01856-4

Extreme events driven by long-term variations in precipitation, temperature and vapour pressure deficit often result in greater losses in ecosystem productivity than short-term extremes, according to an analysis of global eddy covariance flux data from 1995 to 2020.
21 Nov 2025 at 12:00am
A crystal that breathes


Nature Materials, Published online: 19 November 2025; doi:10.1038/s41563-025-02424-2

An organic crystal containing open channels and discrete voids responds to CO2 gas pressure by reversibly elongating along a single crystal axis. Although the voids initially appear too small to host CO2, structural flexibility permits gradual gas penetration and void expansion, triggering a cascading deformation that amplifies macroscopically.
19 Nov 2025 at 12:00am
Pressure-induced redox reversal of iron and the distribution of elements in deep Earth
by Xiaoli WangXiaolei FengJianfu LiYang LvAustin EllisSamantha ScottAbhiyan PanditDalar KhodagholianRussell J. HemleyMatthew G. JacksonFrank SperaSimon A. T. RedfernMaosheng MiaoaSchool of Physics and Electronic Information, Yantai University, Yantai 264005, ChinabSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporecDepartment of Chemistry and Biochemistry, California State University, Northridge, CA 91330dDepartment of Physics, University of Illinois Chicago, Chicago, IL 60607eDepartment of Chemistry, University of Illinois Chicago, Chicago, IL 60607fDepartment of Earth and Environmental Sciences, University of Illinois Chicago, Chicago, IL 60607gDepartment of Earth Science, University of California Santa Barbara, Santa Barbara, CA 93110hAsian School of the Environment, Nanyang Technological University, Singapore 639798, Singapore
Proceedings of the National Academy of Sciences, Volume 122, Issue 46, November 2025.
SignificanceThe oxidation–reduction behavior of iron under pressure in part controls the chemical processes occurring in the deep Earth. Large-scale first-principles calculations show that iron reverses its redox nature under core pressures, shifting from ...
10 Nov 2025 at 9:00am

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Cavity-Enhanced Doppler-Broadening Thermometry via All-Frequency Metrology
by Qi Huang (黄琪), Jin Wang (王进), Rui-Heng Yin (尹睿恒), Yan Tan (谈艳), Cun-Feng Cheng (程存峰), Yu R. Sun (孙羽), An-Wen Liu (刘安雯), and Shui-Ming Hu (胡水明)
Author(s): Qi Huang (黄琪), Jin Wang (王进), Rui-Heng Yin (尹睿恒), Yan Tan (谈艳), Cun-Feng Cheng (程存峰), Yu R. Sun (孙羽), An-Wen Liu (刘安雯), and Shui-Ming Hu (胡水明)


We demonstrate Doppler broadening thermometry (DBT) with all-frequency-domain measurements. Using the R(10) transition of CO at 1567 nm in a high-finesse optical cavity (mode width 0.6 kHz), we resolve Doppler profiles with high signal-to-noise ratios across 2–17 Pa pressures. A global Voigt-profile…


[Phys. Rev. Lett. 135, 223002] Published Tue Nov 25, 2025
25 Nov 2025 at 11:00am
High Pressure Superconducting Transition in Dihydride ${\mathrm{BiH}}_{2}$ with Bismuth Open-Channel Framework
by Liang Ma, Xin Yang, Mei Li, Pengfei Shan, Ziyi Liu, Jun Hou, Sheng Jiang, Lili Zhang, Chuanlong Lin, Pengtao Yang, Bosen Wang, Jianping Sun, Yang Ding, Huiyang Gou, Haizhong Guo, and Jinguang Cheng
Author(s): Liang Ma, Xin Yang, Mei Li, Pengfei Shan, Ziyi Liu, Jun Hou, Sheng Jiang, Lili Zhang, Chuanlong Lin, Pengtao Yang, Bosen Wang, Jianping Sun, Yang Ding, Huiyang Gou, Haizhong Guo, and Jinguang Cheng


Metal hydrides $M{\mathrm{H}}_{x}\text{ }(x≤2$) with low hydrogen content are not expected to show high-${T}_{\mathrm{c}}$ superconductivity owing to the low hydrogen-derived electronic density of states at Fermi level and the limited hydrogen contribution to electron-phonon coupling strength. In th…


[Phys. Rev. Lett. 135, 226003] Published Tue Nov 25, 2025
25 Nov 2025 at 11:00am
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 and doping effects on the electronic structure and magnetism of the single-layer nickelate ${\mathrm{La}}_{2}{\mathrm{NiO}}_{4}$
by J. B. de Vaulx, F. Bernardini, V. Olevano, Q. N. Meier, and A. Cano
Author(s): J. B. de Vaulx, F. Bernardini, V. Olevano, Q. N. Meier, and A. Cano


${\mathrm{La}}_{2}{\mathrm{NiO}}_{4}$ is a prototypical member of the Ruddlesden-Popper nickelate series that offers a valuable reference point for elucidating the key ingredients behind the intriguing properties of these systems. However, the structural and electronic properties of ${\mathrm{La}}_{…


[Phys. Rev. Materials 9, 114804] Published Mon Nov 24, 2025
24 Nov 2025 at 11:00am
Correlation-promoted electron-phonon coupling and superconductivity in bulk FeSe
by Lan-Lin Du, Shiqi Hu, Yang Yang, Xuande Bu, and Sheng Meng
Author(s): Lan-Lin Du, Shiqi Hu, Yang Yang, Xuande Bu, and Sheng Meng


Electron-phonon coupling (EPC) plays an important role in FeSe, yet theoretical predictions have struggled to reconcile with experiments on doping- and pressure-dependent superconductivity. Here, we employ dynamical mean-field theory to investigate correlation-corrected EPC in FeSe under carrier dop…


[Phys. Rev. Materials 9, 114803] Published Fri Nov 21, 2025
21 Nov 2025 at 11:00am
In-plane Ni–O–Ni bond angles as structural fingerprints of superconductivity in layered nickelates: Effects of pressure, strain, layering, and correlations
by Bipasa Samanta and Alexandru B. Georgescu
Author(s): Bipasa Samanta and Alexandru B. Georgescu


We investigate the structural and electronic conditions conducive to superconductivity in layered nickelates using density-functional theory. For both the bilayer and 1–3 polymorphs of ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$, we find that the in-plane Ni–O–Ni bond angles under pressure …


[Phys. Rev. Materials 9, 114801] Published Mon Nov 03, 2025
3 Nov 2025 at 11:00am
Erratum: Modeling the high-pressure solid and liquid phases of tin from deep potentials with ab initio accuracy [Phys. Rev. Materials 7, 053603 (2023)]
by Tao Chen, Fengbo Yuan, Jianchuan Liu, Huayun Geng, Linfeng Zhang, Han Wang, and Mohan Chen
Author(s): Tao Chen, Fengbo Yuan, Jianchuan Liu, Huayun Geng, Linfeng Zhang, Han Wang, and Mohan Chen
[Phys. Rev. Materials 9, 109903] Published Tue Oct 28, 2025
28 Oct 2025 at 11:00am
Unraveling the interplay of spins, lattice, and pressure in $\mathrm{LuFe}{\mathrm{O}}_{3}$: Inelastic neutron scattering and ab initio simulations
by Sourav Bag, Samiran Malgope, Mayanak K. Gupta, S. K. Mishra, Ranjan Mittal, Stephane Rols, and Samrath L. Chaplot
Author(s): Sourav Bag, Samiran Malgope, Mayanak K. Gupta, S. K. Mishra, Ranjan Mittal, Stephane Rols, and Samrath L. Chaplot


The multiferroic $\mathrm{LuFe}{\mathrm{O}}_{3}$ unusually shows a magnetic order that causes ferroelectricity up to a rather high temperature of 610 K indicating very strong magnetoelectric coupling. We present the inelastic neutron-scattering (INS) measurements and ab initio density-functional the…


[Phys. Rev. Materials 9, 104411] Published Thu Oct 16, 2025
16 Oct 2025 at 12:00pm
Electronic topological transition in zinc under shock compression revealed by electrical resistivity measurements
by Zhenning Wang, Yifeng Zhang, Feng Gao, Xilong Dou, Bo Gan, and Kaile Tang
Author(s): Zhenning Wang, Yifeng Zhang, Feng Gao, Xilong Dou, Bo Gan, and Kaile Tang


Electronic topological transitions (ETTs) are characterized by abrupt changes in Fermi-surface topology, which can lead to pronounced anomalies in the physical properties of transition metals under high pressure-temperature ($P−T$) conditions. Zinc (Zn), a group-IIB transition metal with a fully occ…


[Phys. Rev. B 112, 195130] Published Mon Nov 24, 2025
24 Nov 2025 at 11:00am
Optical and vibrational properties of ${\mathrm{Rb}}_{2}{\mathrm{CuCl}}_{4}({\mathrm{H}}_{2}\mathrm{O}){}_{2}$: Pseudo Jahn-Teller distortion
by L. Gómez, F. Rodríguez, F. Aguado, and R. Valiente
Author(s): L. Gómez, F. Rodríguez, F. Aguado, and R. Valiente


This work investigates the electronic and vibrational structures of the pseudo Jahn-Teller (PJT) compound ${\mathrm{Rb}}_{2}{\mathrm{CuCl}}_{4}{({\mathrm{H}}_{2}\mathrm{O})}_{2}$, along with their pressure dependence using optical absorption and Raman spectroscopy. The rhombic $({\mathrm{D}}_{2\math…


[Phys. Rev. B 112, 174117] Published Fri Nov 21, 2025
21 Nov 2025 at 11:00am
Incommensurate spin fluctuations and competing pairing symmetries in ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$
by Han-Xiang Xu and Daniel Guterding
Author(s): Han-Xiang Xu and Daniel Guterding


The recent discovery of superconductivity in the bilayer Ruddlesden-Popper nickelate ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ under high pressure has generated much interest in the superconducting pairing mechanism of nickelates. Despite extensive work, the superconducting pairing symmet…


[Phys. Rev. B 112, 174519] Published Fri Nov 21, 2025
21 Nov 2025 at 11:00am
Complex spin density wave ordering in ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$
by Yantao Cao, Andi Liu, Bin Wang, Mingxin Zhang, Yanpeng Qi, Thomas J. Hicken, Hubertus Luetkens, Zhendong Fu, Jason S. Gardner, Jinkui Zhao, and Hanjie Guo
Author(s): Yantao Cao, Andi Liu, Bin Wang, Mingxin Zhang, Yanpeng Qi, Thomas J. Hicken, Hubertus Luetkens, Zhendong Fu, Jason S. Gardner, Jinkui Zhao, and Hanjie Guo


The discovery of high-temperature superconductivity in layered nickelates under pressure has recently triggered enormous interest. Studies of these compounds have revealed a density-wave-like transition at ambient pressure, though its connection with superconductivity is still not well understood. H…


[Phys. Rev. B 112, 174423] Published Wed Nov 19, 2025
19 Nov 2025 at 11:00am
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
Volume 45, Issue 3, September 2025, Page 195-209
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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
Volume 45, Issue 3, September 2025, Page 210-214
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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
Volume 45, Issue 3, September 2025, Page 269-287
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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
Volume 45, Issue 3, September 2025, Page 215-233
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29 Jul 2025 at 9:29am
Single-crystal X-ray diffraction study of the incommensurately modulated structure of flamite under high pressure
by Mark A. Ignatov Sergey V. Rashchenko Nikita E. Bogdanov Alexandr V. Romanenko Ella V. Sokol Svetlana N. Kokh a Sobolev Institute of Geology and Mineralogy Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russiab Department of Geology and Geophysics, Novosibirsk State University, Novosibirsk, Russia
Volume 45, Issue 3, September 2025, Page 256-268
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18 Aug 2025 at 4:27am
Structural, elastic and thermodynamic characteristics of trigonal-type Zintl phases CaZn2X2 (X = P or As) under hydrostatic pressure: prospects for advanced materials in high pressure and thermoelectric devices
by Missoum Radjai Abdelmadjid Bouhemadou Saber Saad Essaoud Djamel Allali Rabah Khenata Yarub Al-Douri a Laboratory of Physics of Experimental Techniques and Their Applications (LPTEAM), University of Yahia Fares, Medea, Algeriab Laboratory for Developing New Materials and their Characterizations, Department of Physics, Faculty of Science, Ferhat Abbas University – Setif 1, Setif, Algeriac Department of Physics, Faculty of Sciences, University of M'sila, M'sila, Algeriad Laboratory of materials and renewable energy, Faculty of science, University of M'sila, M'sila, Algeriae Physics and Chemistry of Materials Lab, Department of Physics, University of M'sila, M'sila, Algeriaf Laboratoire de Physique Quantique de la Matière et de Modélisation Mathématique (LPQ3M), Université de Mascara, Mascara, Algeriag College of Health and Medical Techniques, Al-Bayan University, Baghdad, Iraqh Nanotechnology and Catalysis Research Center (NANOCAT), University of Malaya, Kuala Lumpur, Malaysiai Department of Mechanical Engineering, Faculty of Engineering, Piri Reis University, Istanbul, Turkey
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31 Oct 2025 at 10:07am