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.

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Superconductivity at 28 K in Sodium Graphite Intercalation Compound under High Pressure
by Guangchen Ma, Yingying Wang, Zefang Wang, Yuki Nakamoto, Katsuya Shimizu, Guangtao Liu, Mi Zhou, Hongbo Wang, Pengyue Gao, and Yanming Ma
Author(s): Guangchen Ma, Yingying Wang, Zefang Wang, Yuki Nakamoto, Katsuya Shimizu, Guangtao Liu, Mi Zhou, Hongbo Wang, Pengyue Gao, and Yanming Ma


The discovery of 15.1 K superconductivity in first-stage ${\mathrm{CaC}}_{6}$ reignited interest in searching for high-temperature superconductors in graphite intercalation compounds (GICs). However, despite nearly two decades of intensive research, progress in exploring high-temperature superconduc…


[Phys. Rev. Lett. 135, 166003] Published Wed Oct 15, 2025
15 Oct 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
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
Thermal properties of hexagonal diamond: Machine learning potential and molecular dynamics study
by Jian Zhang, Zhuo Zhao, Miao Jiang, Yuan Cheng, and Gang Zhang
Author(s): Jian Zhang, Zhuo Zhao, Miao Jiang, Yuan Cheng, and Gang Zhang


Recently, well-crystallized and nearly phase-pure Lonsdaleite (hexagonal diamond) has been successfully synthesized by heating graphite under extreme pressure conditions. Despite ongoing investigations into its physical properties, there remains a lack of high-precision interatomic potentials capabl…


[Phys. Rev. Materials 9, 094603] Published Mon Sep 29, 2025
29 Sep 2025 at 12:00pm
Pressure-tuned spin chains in brochantite, ${\mathrm{Cu}}_{4}{\mathrm{SO}}_{4}{(\mathrm{OH})}_{6}$
by Victoria A. Ginga, Bin Shen, Ece Uykur, Nico Giordano, Philipp Gegenwart, and Alexander A. Tsirlin
Author(s): Victoria A. Ginga, Bin Shen, Ece Uykur, Nico Giordano, Philipp Gegenwart, and Alexander A. Tsirlin


Using high-pressure single-crystal x-ray diffraction combined with thermodynamic measurements and density-functional calculations, we uncover the microscopic magnetic model of the mineral brochantite, ${\mathrm{Cu}}_{4}{\mathrm{SO}}_{4}{(\mathrm{OH})}_{6}$, and its evolution upon compression. The fo…


[Phys. Rev. Materials 9, 094412] Published Wed Sep 24, 2025
24 Sep 2025 at 12:00pm
Evolution of charge correlations in the hole-doped kagome superconductor ${\mathrm{CsV}}_{3−x}{\mathrm{Ti}}_{x}{\mathrm{Sb}}_{5}$
by Ganesh Pokharel, Canxun Zhang, Evgeny Redekop, Brenden R. Ortiz, Andrea N. Capa Salinas, Sarah Schwarz, Steven J. Gomez Alvarado, Suchismita Sarker, Andrea F. Young, and Stephen D. Wilson
Author(s): Ganesh Pokharel, Canxun Zhang, Evgeny Redekop, Brenden R. Ortiz, Andrea N. Capa Salinas, Sarah Schwarz, Steven J. Gomez Alvarado, Suchismita Sarker, Andrea F. Young, and Stephen D. Wilson


The interplay between superconductivity and charge correlations in the kagome metal ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$ can be tuned by external perturbations such as doping or pressure. Here we present a study of charge correlations and superconductivity upon hole doping via Ti substitution on th…


[Phys. Rev. Materials 9, 094805] Published Tue Sep 16, 2025
16 Sep 2025 at 12:00pm
High-temperature superconductivity induced by the Su-Schrieffer-Heeger electron-phonon coupling
by Xun Cai, Zi-Xiang Li, and Hong Yao
Author(s): Xun Cai, Zi-Xiang Li, and Hong Yao


The experimental quest for high-temperature and room-temperature superconductivity (SC) at ambient pressure has been a long-standing research theme in physics. It has also been desired to construct reliable microscopic mechanisms that may achieve high-temperature SC. Here, we systematically explore …


[Phys. Rev. B 112, 144517] Published Fri Oct 24, 2025
24 Oct 2025 at 12:00pm
Electronic temperature driven phase stability and structural evolution of iron at high pressure
by S. Azadi and S. M. Vinko
Author(s): S. Azadi and S. M. Vinko


We present Gibbs free-energy phase diagrams for compressed iron within a pressure range of 20–300 GPa and electronic temperature up to 3 eV, obtained using finite-temperature density functional and density functional perturbation theories. Our results for bcc, fcc, and hcp phases predict solid-solid…


[Phys. Rev. B 112, 134103] Published Thu Oct 23, 2025
23 Oct 2025 at 12:00pm
Evidence for easy-plane XY ferromagnetism in heavy-fermion quantum-critical ${\mathrm{CeRh}}_{6}{\mathrm{Ge}}_{4}$
by Riku Yamamoto, Sejun Park, Zachary W. Riedel, Phurba Sherpa, Joe D. Thompson, Filip Ronning, Eric D. Bauer, Adam P. Dioguardi, and Michihiro Hirata
Author(s): Riku Yamamoto, Sejun Park, Zachary W. Riedel, Phurba Sherpa, Joe D. Thompson, Filip Ronning, Eric D. Bauer, Adam P. Dioguardi, and Michihiro Hirata


By employing 73Ge nuclear quadrupole resonance (NQR) and magnetic resonance (NMR) spectroscopy, the authors unveil here the magnetic anisotropy and structure in the heavy-fermion quantum-critical ferromagnet CeRh6Ge4. They identify a uniform ferromagnetic order and a small ordered moment of 0.26 μB/Ce confined within the ab plane with an XY-type easy-plane character. They also find an involved interplay of hybridization and 4f-electron local moment physics, providing new insights towards designing a more realistic theoretical framework to describe the quantum criticality in this compound under pressure.


[Phys. Rev. B 112, 155152] Published Thu Oct 23, 2025
23 Oct 2025 at 12:00pm
Tuning the magnetic and electronic properties of the double perovskite ${\mathrm{La}}_{2}{\mathrm{CoIr}}_{1−x}{\mathrm{Ti}}_{x}{\mathrm{O}}_{6}$
by Sromona Nandi, Vineeta Yadav, S. Devi, C. S. Yadav, Bikash Das, Subhadeep Datta, Kapildeb Dolui, and Rudra Sekhar Manna
Author(s): Sromona Nandi, Vineeta Yadav, S. Devi, C. S. Yadav, Bikash Das, Subhadeep Datta, Kapildeb Dolui, and Rudra Sekhar Manna


The ${\mathrm{La}}_{2}{\mathrm{CoIr}}_{1−x}{\mathrm{Ti}}_{x}{\mathrm{O}}_{6}$ $(0≤x≤1)$ double perovskite series serves as an effective platform for investigating the evolution of magnetic and electronic properties as a function of chemical pressure (doping) or hydrostatic pressure due to the interp…


[Phys. Rev. B 112, 155144] Published Mon Oct 20, 2025
20 Oct 2025 at 12:00pm
Optical conductivity and band gap in the double-Weyl candidate ${\mathrm{SrSi}}_{2}$ at ambient pressure
by L. Z. Maulana, A. A. Tsirlin, E. Uykur, Y. Saito, M. Dressel, M. Imai, and A. V. Pronin
Author(s): L. Z. Maulana, A. A. Tsirlin, E. Uykur, Y. Saito, M. Dressel, M. Imai, and A. V. Pronin


The authors study here the possible double-Weyl state in cubic SrSi2 using optical spectroscopy and ab initio calculations. The free-carrier density, found from optics, decreases with decreasing temperature, consistent with an activation behavior. Experimental interband conductivity juxtaposed with ab initio calculations shows that conventional density functional theory fails to describe the electronic structure of SrSi2 near the Fermi level. A semilocal exchange-correlation potential allows a much better agreement with the experiment, resulting a gapped band structure of SrSi2 with the direct gap of 35–40 meV.


[Phys. Rev. B 112, 155209] Published Mon Oct 20, 2025
20 Oct 2025 at 12:00pm
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