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.

Surface melting–driven hydrogen absorption for high-pressure polyhydride synthesis
by Ryuhei SatoLewis J. ConwayDi ZhangChris J. PickardKazuto AkagiKartik SauHao LiShin-ichi OrimoaAdvanced Institute for Materials Research, Tohoku University, Sendai 980-8577, JapanbDepartment of Materials Engineering, The University of Tokyo, Tokyo 113-8656, JapancDepartment of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, United KingdomdMathematics for Advanced Materials Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, c/o Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, JapaneInstitute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Proceedings of the National Academy of Sciences, Volume 122, Issue 22, June 2025.
SignificanceRoom-temperature superconductors could revolutionize modern technology by enabling lossless power transmission, powerful magnets, advanced medical imaging (MRI), and quantum computing. Polyhydrides—hydrogen-rich compounds synthesized under ...
29 May 2025 at 9:00am

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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
Superconductivity in Trilayer Nickelate ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$ under Pressure
by Mingxin Zhang et al.
Author(s): 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.


[Phys. Rev. X 15, 021005] Published Fri Apr 04, 2025
4 Apr 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
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
Author(s): 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.


[Phys. Rev. Materials 9, L050801] Published Tue May 27, 2025
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
Author(s): 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…


[Phys. Rev. Materials 9, 053402] Published Fri May 16, 2025
16 May 2025 at 12:00pm
Impact of magnetism on Fe phase diagram under extreme conditions
by Grigory S. Smirnov, Oleg E. Peil, Andrei V. Ruban, Sergei I. Simak, and Anatoly B. Belonoshko
Author(s): Grigory S. Smirnov, Oleg E. Peil, Andrei V. Ruban, Sergei I. Simak, and Anatoly B. Belonoshko


Iron is a major component of the cores of the Earth and inhabited exoplanets. Its phase diagram at extreme pressures (P) and temperatures (T) is the subject of extensive debate. While recent experiments provide evidence for the stability of the body-centered cubic (bcc) phase, several theoretical st…


[Phys. Rev. Materials 9, L040601] Published Wed Apr 23, 2025
23 Apr 2025 at 12:00pm
${\mathrm{Ni}}^{1+δ}$ metallic state and purely $\mathrm{Ni}\text{−}{d}_{{x}^{2}−{y}^{2}}$-occupied Fermi surface in ${\mathrm{SrNiO}}_{2}$-based superlattices at ambient pressure
by Miao Li, Zhenyu Ding, Yuqiang Liu, Liangyu Li, Gang Wu, and Xiaoping Yang
Author(s): Miao Li, Zhenyu Ding, Yuqiang Liu, Liangyu Li, Gang Wu, and Xiaoping Yang


The rich physics of nickelates has garnered widespread attention, particularly for their superconductivity and the prominent $\mathrm{Ni}\text{−}{d}_{{x}^{2}−{y}^{2}}$-dominated Fermi surface. Motivated by the ${\mathrm{Ni}}^{1+δ}$ superconductivity in infinite-layer ${\mathrm{NdNiO}}_{2}$ (${T}_{c}…


[Phys. Rev. Materials 9, 044802] Published Mon Apr 21, 2025
21 Apr 2025 at 12:00pm
High-temperature superconductivity of ternary Cs-In-H compounds at low pressure
by Hongyu Huang, Min Wang, Xiaoyan Yan, Hao Song, Defang Duan, Tian Cui, and Mingyang Du
Author(s): Hongyu Huang, Min Wang, Xiaoyan Yan, Hao Song, Defang Duan, Tian Cui, and Mingyang Du


Hydride superconductors are considered promising candidates for achieving high-temperature superconductivity, yet the ultrahigh pressures required for their stabilization present significant challenges for practical applications. In this study, a series of Cs-In-H ternary hydrides were systematicall…


[Phys. Rev. B 111, 224502] Published Tue Jun 03, 2025
3 Jun 2025 at 12:00pm
Wrinkles in graphene suspended on flat substrates: Structure and collapse under hydrostatic pressure
by Alexander V. Savin and Artem P. Klinov
Author(s): Alexander V. Savin and Artem P. Klinov


The method of molecular dynamics and molecular mechanics has been used to numerically simulate the formation of wrinkle systems during compression of a graphene sheet lying on a flat solid substrate. It is shown that under uniaxial compression the nanosheet can transition into several stable wrinkle…


[Phys. Rev. B 111, 245403] Published Tue Jun 03, 2025
3 Jun 2025 at 12:00pm
Unified equation of state of tungsten up to 527 GPa using modified toroidal diamond anvil cells
by Yingji Ding, Tianmin Fang, Shuqing Jiang, Yuchen Zhang, Xiaoli Huang, and Tian Cui
Author(s): Yingji Ding, Tianmin Fang, Shuqing Jiang, Yuchen Zhang, Xiaoli Huang, and Tian Cui


The equation of state (EoS) of a system is vital in multiple fields, including physics, geophysics, and astrophysics. However, the available EoSs of simple metals under pressures of more than 400 GPa are far from adequate for the research under extreme conditions. In this work, we have extended the …


[Phys. Rev. B 111, 214101] Published Mon Jun 02, 2025
2 Jun 2025 at 12:00pm
High-pressure sulfur frameworks in Mg-S compounds: Tuning superconductivity through covalent connectivity
by Qianhui Wu, Aitor Bergara, Xiaohua Zhang, and Guochun Yang
Author(s): Qianhui Wu, Aitor Bergara, Xiaohua Zhang, and Guochun Yang


Understanding the behavior of compounds with rich covalent connectivity under high pressure is crucial for advancing superconductor design. In this study, we identify two superconducting S-rich Mg-S compounds, $P6$/mmm $\mathrm{Mg}{\mathrm{S}}_{2}$ and $I4/m \mathrm{Mg}{\mathrm{S}}_{4}$, using first…


[Phys. Rev. B 111, 214501] Published Mon Jun 02, 2025
2 Jun 2025 at 12:00pm
Investigating the insulator-metal transition in ${\mathrm{Ca}}_{2}{\mathrm{RuO}}_{4}$ via temperature and electric current: Insights from hard x-ray photoemission spectroscopy
by Daiki Ootsuki, Daisuke Shibata, Giordano Mattoni, Yukie Takasuka, Eiji Ikenaga, Akira Yasui, Chanchal Sow, Shingo Yonezawa, Yoshiteru Maeno, Fumihiko Nakamura, and Teppei Yoshida
Author(s): Daiki Ootsuki, Daisuke Shibata, Giordano Mattoni, Yukie Takasuka, Eiji Ikenaga, Akira Yasui, Chanchal Sow, Shingo Yonezawa, Yoshiteru Maeno, Fumihiko Nakamura, and Teppei Yoshida


Layered ruthenium oxide ${\mathrm{Ca}}_{2}{\mathrm{RuO}}_{4}$ is a Mott insulator and its frozen state can be melted by various stimuli such as temperature variation, chemical substitution, pressure, and current application. In this study, we have investigated the variation of the electronic structu…


[Phys. Rev. B 111, 235107] Published Mon Jun 02, 2025
2 Jun 2025 at 12:00pm
Hybridization-induced quantum phase transition in the bilayer Hubbard model
by Xun Liu and Mi Jiang
Author(s): Xun Liu and Mi Jiang


Inspired by the recent experimental report on the pressure-induced superconductor-insulator transition in cuprate superconductors as well as the superconductivity of the Ruddlesden-Popper-phase ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ under high pressure, we systematically investigated t…


[Phys. Rev. B 111, 245103] Published Mon Jun 02, 2025
2 Jun 2025 at 12:00pm
Spin state of iron in $I\overline{4}2d$-type ${\mathrm{Mg}}_{2}{\mathrm{SiO}}_{4}$ at ultrahigh pressures
by Tianqi Wan, Yang Sun, and Renata M. Wentzcovitch
Author(s): Tianqi Wan, Yang Sun, and Renata M. Wentzcovitch


At extreme pressures of approximately 500 GPa—conditions characteristic of the deep interiors of super-Earths—the combination of NaCl-type MgO and postperovskite-type ${\mathrm{MgSiO}}_{3}$ (PPv) has been reported to produce a postpost-perovskite (PPPv) phase of ${\mathrm{Mg}}_{2}{\mathrm{SiO}}_{4}$…


[Phys. Rev. B 111, 245105] Published Mon Jun 02, 2025
2 Jun 2025 at 12:00pm
In situ electrical conductivity measurement of saturated rocks at shallow crustal temperatures and pressures in an autoclave
by Chaoyi Xiao Shuangming Shan Heping Li Sen Lin Shengbin Li a Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, People’s Republic of Chinab University of Chinese Academy of Sciences, Beijing, People’s Republic of China
Volume 45, Issue 1, March 2025, Page 57-66
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24 Dec 2024 at 7:38am
Temperature gradients in high pressure multi-anvil cell
by Takuya Moriguti Akira Yoneda Eiji Ito a Institute for Planetary Materials, Okayama University, Misasa, Tottori, Japanb Department of Earth and Space Science, Osaka University, Toyonaka, Osaka, Japan
Volume 45, Issue 1, March 2025, Page 1-16
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19 Dec 2024 at 1:29pm
Pressure-sensitive germanate glass-Li2GeO3, a multifunctional energy material: a theoretical study
by R. Zosiamliana L. Celestine Lalhriat Zuala B. Chettri Zodin Mawia G. Abdurakhmanov A. Laref Shalika R. Bhandari D. P. Rai a Physical Sciences Research Center (PSRC), Department of Physics, Pachhunga University College, Mizoram University, Aizawl, Indiab Department of Physics, Mizoram University, Aizawl, Indiac Department of Physics, North-Eastern Hill University, Shillong, Indiad National University of Uzbekistan, Tashkent, Uzbekistane Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabiaf Department of Physics, Bhairahawa Multiple Campus, Tribhuvan University, Rupandehi, Nepal
Volume 45, Issue 1, March 2025, Page 29-56
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25 Dec 2024 at 7:29am
High pressure behavior of incommensurately modulated nyerereite structure
by N. Bogdanov S. Rashchenko P. Gavryushkin V. Thomas D. Fursenko Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia
Volume 45, Issue 1, March 2025, Page 67-78
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27 Dec 2024 at 8:15am
Crystalline state in a pressure region of proceeding amorphization of SnI4
by Kazuhiro Fuchizaki Hiroki Naruta Fumiya Sato Tomohiro Ohuchi Akio Suzuki a Department of Physics, Ehime University, Matsuyama, Japanb Graduate School of Science and Engineering, Ehime University, Matsuyama, Japanc Geodynamics Research Center, Ehime University, Matsuyama, Japand Department of Earth Science, Tohoku University, Sendai, Japan
Volume 45, Issue 1, March 2025, Page 90-107
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13 Jan 2025 at 12:09pm
High pressure Raman spectroscopy of boron-rich boron carbides up to 50 GPa
by Raimundas Sereika Seth Iwan Paul A. Baker Yogesh K. Vohra Department of Physics, University of Alabama at Birmingham, Birmingham, AL, USA
Volume 45, Issue 1, March 2025, Page 79-89
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6 Jan 2025 at 8:55am
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
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13 Mar 2025 at 11:57am
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
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19 Feb 2025 at 7:57am
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
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21 Apr 2025 at 5:23am