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.

Pore pressure inhibits clustering of induced earthquakes in Western Canada

by Bing Q. LiaDepartment of Civil and Environmental Engineering, Western University, London, ON N6A 5B9, Canada

6 Jan 2025 at 9:00am

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QCD Constraints on Isospin-Dense Matter and the Nuclear Equation of State

by Ryan Abbott, William Detmold, Marc Illa, Assumpta Parreño, Robert J. Perry, Fernando Romero-López, Phiala E. Shanahan, and Michael L. Wagman (NPLQCD Collaboration)

Simulations of neutron stars provide new bounds on their properties, such as their internal pressure and their maximum mass.

6 Jan 2025 at 11:00am

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

Pressure driven iso-structural phase transition and its implication on the Néel skyrmion host hexagonal PtMnGa

by K. K. Dubey, S. Rastogi, Ajit K. Jena, Gaurav K. Shukla, Parul Devi, Seung-Cheol Lee, Satadeep Bhattacharjee, R. Rawat, Boby Joseph, and Sanjay Singh

Magnetic skyrmions are nanometer-sized whirling spin textures in the magnetic material, which have the potential to revolutionize the field of spintronics. This study explores the influence of pressure on the structural properties of the PtMnGa hexagonal system, recognized for hosting Néel skyrmions…

27 Dec 2024 at 11:00am

Growth and characterization of the ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7−δ}$ thin films: Dominant contribution of the ${d}_{{x}^{2}−{y}^{2}}$ orbital at ambient pressure

by Yuecong Liu, Mengjun Ou, Haifeng Chu, Huan Yang, Qing Li, Ying-Jie Zhang, and Hai-Hu Wen

Using the pulsed-laser-ablation technique, we successfully grew ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7−δ}$ thin films with $c$-axis orientation perpendicular to the film surface. X-ray diffraction showed that the (00l) peaks can be well-indexed to the ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{…

16 Dec 2024 at 11:00am

Breakdown of electron lone pair and insulator-to-metal transition in $\mathrm{Ti}{\mathrm{S}}_{3}$ under high pressure

by A. R. Atique Ulla, P. Modak, and Ashok K. Verma

Solid titanium trisulfide ($\mathrm{Ti}{\mathrm{S}}_{3}$), a layered semiconducting material, has attracted considerable attention in recent times because of its robust anisotropic optical and electronic properties, which opened tremendous application possibilities. In a recent experiment, it was ob…

13 Dec 2024 at 11:00am

Hydrostatic pressure effect on structural and transport properties of co-existing layered and disordered rock-salt phase of ${\mathrm{Li}}_{\mathrm{x}}{\mathrm{CoO}}_{2}$

by Thiagarajan Maran, Anil Jain, Muthukumaran Sundaramoorthy, Aditya Prasad Roy, Boby Joseph, Govindaraj Lingannan, Ashwin Mohan, Dipanshu Bansal, S. M. Yusuf, and Arumugam Sonachalam

It is widely believed that the origin of a significant cause of voltage and capacity fading observed in lithium (Li)-ion batteries is related to structural modifications occurring in the cathode material during the Li-ion insertion/deinsertion process. The Li-ion insertion/deinsertion mechanism and …

2 Dec 2024 at 11:00am

Assessing spin-density wave formation in ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ from electronic structure calculations

by Harrison LaBollita, Victor Pardo, Michael R. Norman, and Antia S. Botana

Materials with strongly interacting electrons can exhibit remarkable behaviors, such as stripe ordering, where charge and spin form periodic patterns. These states often precede unconventional superconductivity, as in the bilayer nickelate La3Ni2O7 under pressure. Using correlated density-functional methods, the authors interrogate possible magnetic ground states of La3Ni2O7. The stripe-ordered ground state reproduces several experimental features, including insulating behavior at ambient pressure and strong antiferromagnetic coupling within the Ni-dz2 orbitals. Moreover, they find that the Ni-dx2−y2 orbitals play a dominant role at low-energy. Overall, their findings provide fresh insights into the stripe ordering and its potential link to superconductivity in this fascinating material.

20 Nov 2024 at 11:00am

First-principles design of ambient-pressure ${\mathrm{Mg}}_{x}{\mathrm{B}}_{2}{\mathrm{C}}_{2}$ and ${\mathrm{Na}}_{x}\mathrm{BC}$ superconductors

by Charlsey R. Tomassetti, Daviti Gochitashvili, Christopher Renskers, Elena R. Margine, and Aleksey N. Kolmogorov

We employ ab initio modeling to investigate the possibility of attaining high-temperature conventional superconductivity in ambient-pressure materials based on the known ${\mathrm{MgB}}_{2}{\mathrm{C}}_{2}$ and recently proposed thermodynamically stable NaBC ternary compounds. The constructed $(T,{P…

14 Nov 2024 at 11:00am

Highly asymmetric superconducting dome and strange metallicity in ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$

by Jiangfan Wang and Yi-feng Yang

The recent discovery of high-temperature superconductivity in ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ under high pressure has stimulated intensive investigations concerning its paring mechanism and a correct description of its effective low-energy physics. Notable experimental observati…

15 Jan 2025 at 11:00am

Prediction of high-temperature ambient-pressure superconductivity in hexagonal boron-rich clathrates

by Bin Li, Yuxiang Fan, Chuanhui Yin, Junjie Zhai, Cong Zhu, Zhisi Cao, Jie Cheng, and Shengli Liu

Inspired by recent predictions of superconductivity in B-C framework clathrates, we employ density functional theory to explore potential superconductors among hexagonal hydride-substituted compounds with compositions $X{\mathrm{B}}_{8}\mathrm{C}, X{\mathrm{B}}_{7}{\mathrm{C}}_{2}, X{\mathrm{B}}_{6}…

13 Jan 2025 at 11:00am

Synchrotron x-ray diffraction and DFT study of non-centrosymmetric EuRhGe3 under high pressure

by N. S. Dhami V. Balédent I. Batistić O. Bednarchuk D. Kaczorowski J. P. Itié S. R. Shieh C. M. N. Kumar Y. Utsumi a Department for Research of Materials Under Extreme Conditions, Institute of Physics, Zagreb, Croatiab Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, Orsay, Francec Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatiad Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, Polande PSICHÉ beamline, Synchrotron SOLEIL, Saint-Aubin, Francef Department of Earth Sciences, Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canadag Department of Molecular Magnetism, The Henryk Niewodniczański, Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland

4 Sep 2024 at 4:50am

Use of molybdenum as a pressure calibrant in a cubic press and sound velocity measurement of tungsten to 5 GPa

by Wei Song Chao Liu Chang Su Yonggang Liu 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 School of Earth Sciences, Institute of Disaster Prevention, Sanhe, People’s Republic of China

11 Nov 2024 at 6:22am

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

24 Dec 2024 at 7:38am

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

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

27 Dec 2024 at 8:15am

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

19 Dec 2024 at 1:29pm

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

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

6 Jan 2025 at 8:55am

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