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.

The future of universities: a Nature special report


Nature, Published online: 24 September 2025; doi:10.1038/d41586-025-03086-5

The world’s universities are under intense pressure. Nature examines the threats they face and asks how the sector can and must adapt to survive.
24 Sep 2025 at 12:00am

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Unified High-Pressure Phase-Transition Sequence in the $f$-Electron Metals: $oF16→oF8$ Transition in Terbium
by C. V. Storm, S. E. Finnegan, J. D. McHardy, M. J. Duff, M. I. McMahon, S. G. MacLeod, E. Plekhanov, and C. Weber
Author(s): C. V. Storm, S. E. Finnegan, J. D. McHardy, M. J. Duff, M. I. McMahon, S. G. MacLeod, E. Plekhanov, and C. Weber


The lanthanide elements have long been reported as having a common series of structural phase transitions on compression, but recent diffraction studies have revealed two series of transitions: one in the low-Z lanthanides (Nd and Sm) involving an 8-atom orthorhombic structure ($oF8$), also seen in …


[Phys. Rev. Lett. 135, 136101] Published Wed Sep 24, 2025
24 Sep 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
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
Pressure suppresses the density wave order in kagome metal ${\mathrm{LuNb}}_{6}{\mathrm{Sn}}_{6}$
by William R. Meier, David E. Graf, Brenden R. Ortiz, Shirin Mozaffari, and David Mandrus
Author(s): William R. Meier, David E. Graf, Brenden R. Ortiz, Shirin Mozaffari, and David Mandrus


The density waves that develop in kagome metals ${\mathrm{ScV}}_{6}{\mathrm{Sn}}_{6}$ and ${\mathrm{LuNb}}_{6}{\mathrm{Sn}}_{6}$ at low temperature appear to arise from underfilled atomic columns within a V-Sn or Nb-Sn scaffolding. Compressing this network with applied pressure in ${\mathrm{ScV}}_{6…


[Phys. Rev. Materials 9, L082001] Published Thu Aug 21, 2025
21 Aug 2025 at 12:00pm
Thermal and mechanical influences on shear band formation and suppression in shocked 1,3,5-trinitroperhydro-1,3,5-triazine (RDX)
by Brenden W. Hamilton and Timothy C. Germann
Author(s): Brenden W. Hamilton and Timothy C. Germann


High-pressure shear band formation is a critical phenomenon in energetic materials because of its ability to form hotspots and influence mechanical strength. Shear banding is known to occur in a variety of these materials, but the governing dynamics of the mechanisms are not well defined for molecul…


[Phys. Rev. Materials 9, 085601] Published Wed Aug 06, 2025
6 Aug 2025 at 12:00pm
Manifold role of a Ta adhesion layer in pressure-tuned Co/Pt multilayers
by Rico Ehrler, Tino Uhlig, René Hübner, Fabian Samad, Peter Heinig, and Olav Hellwig
Author(s): Rico Ehrler, Tino Uhlig, René Hübner, Fabian Samad, Peter Heinig, and Olav Hellwig


In this study, we systematically compare the impact of a 1.5-nm-thin Ta adhesion layer on the structural and magnetic behavior of Co/Pt multilayers (MLs) sputter-deposited at a low and a high Ar gas pressure. Our focus is a comprehensive structural analysis, centered on real-space cross-sectional sc…


[Phys. Rev. B 112, 094452] Published Fri Sep 26, 2025
26 Sep 2025 at 12:00pm
Pressure-induced phase transitions in ${\mathrm{(EDO-TTF)}}_{2}$ ${\mathrm{SbF}}_{6}$ single crystals revealed by ultrafast optical spectroscopy
by Thomas Gauthier, Nicolas Godin, Elzbieta Trzop, Roman Bertoni, Xiangfeng Shao, Mitsuhiko Maesato, Yoshiaki Nakano, and Hideki Yamochi
Author(s): Thomas Gauthier, Nicolas Godin, Elzbieta Trzop, Roman Bertoni, Xiangfeng Shao, Mitsuhiko Maesato, Yoshiaki Nakano, and Hideki Yamochi


In this study, we have investigated the ultrafast photoinduced dynamics of ${(\mathrm{EDO}\text{−}\mathrm{TTF})}_{2}{\mathrm{SbF}}_{6}$ single crystals under hydrostatic pressure. Our results indicate the occurrence of the charge-ordering phase transition under hydrostatic pressure at room temperatu…


[Phys. Rev. B 112, 104323] Published Fri Sep 26, 2025
26 Sep 2025 at 12:00pm
Unified mechanism behind the body-centered-cubic phase stability in compressed solids
by Masaaki Geshi, Hiroki Funashima, and Gayan Prasad Hettiarachchi
Author(s): Masaaki Geshi, Hiroki Funashima, and Gayan Prasad Hettiarachchi


We propose a unified mechanism to understand the remarkable stability of the body-centered cubic (bcc) phase in compressed solids, rooted in the orbital character of the electronic structure. In our previous study [Phys. Rev. B 108, 094112 (2023)], we showed that the contrasting high-pressure behavi…


[Phys. Rev. B 112, 125161] Published Fri Sep 26, 2025
26 Sep 2025 at 12:00pm
Optical control of the crystal structure in the bilayer nickelate superconductor ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ via nonlinear phononics
by Shu Kamiyama, Tatsuya Kaneko, Kazuhiko Kuroki, and Masayuki Ochi
Author(s): Shu Kamiyama, Tatsuya Kaneko, Kazuhiko Kuroki, and Masayuki Ochi


Superconductivity in the bilayer nickelate ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ occurs when the interlayer Ni-O-Ni bond angle becomes straight under pressure, suggesting a strong relationship between the crystal structure and the emergence of superconductivity. In this study, we theo…


[Phys. Rev. B 112, 094115] Published Thu Sep 25, 2025
25 Sep 2025 at 12:00pm
Pressure-induced nearly perfect rectangular lattice and superconductivity in the organic molecular crystal ${\text{(DMET-TTF)}}_{2}{\mathrm{AuBr}}_{2}$
by Taiga Kato, Hanming Ma, Kazuyoshi Yoshimi, Takahiro Misawa, Shigen Kumagai, Youhei Iida, Yoshiaki Sasaki, Masashi Sawada, Jun Gouchi, Takuya Kobayashi, Hiromi Taniguchi, Yoshiya Uwatoko, Hiroyasu Sato, Noriaki Matsunaga, Atsushi Kawamoto, and Kazushige Nomura
Author(s): Taiga Kato, Hanming Ma, Kazuyoshi Yoshimi, Takahiro Misawa, Shigen Kumagai, Youhei Iida, Yoshiaki Sasaki, Masashi Sawada, Jun Gouchi, Takuya Kobayashi, Hiromi Taniguchi, Yoshiya Uwatoko, Hiroyasu Sato, Noriaki Matsunaga, Atsushi Kawamoto, and Kazushige Nomura


External pressure and associated changes in lattice structures are key to realizing exotic quantum phases such as high-${T}_{\mathrm{c}}$ superconductivity. While applying external pressure is a standard method to induce novel lattice structures, its impact on organic molecular crystals has been les…


[Phys. Rev. B 112, 104513] Published Thu Sep 25, 2025
25 Sep 2025 at 12:00pm
Pressure-tuned magnetism and band-gap modulation in layered Fe-doped $\mathrm{Cr}{\mathrm{Cl}}_{3}$
by Mahmoud Abdel-Hafiez, Govindaraj Lingannan, Aya Ali, Lukas Gries, R. Thiyagarajan, Md Ezaz Hasan Khan, Anas Abutaha, T. A. Abdel-Baset, Kei Uemura, Masaki Mito, Vladislav Borisov, Anna Delin, Rüdiger Klingeler, M. S. Ramachandra Rao, and Olle Eriksson
Author(s): Mahmoud Abdel-Hafiez, Govindaraj Lingannan, Aya Ali, Lukas Gries, R. Thiyagarajan, Md Ezaz Hasan Khan, Anas Abutaha, T. A. Abdel-Baset, Kei Uemura, Masaki Mito, Vladislav Borisov, Anna Delin, Rüdiger Klingeler, M. S. Ramachandra Rao, and Olle Eriksson


We report a comprehensive investigation of the structural, magnetic, vibrational, and optical properties of Fe-doped $\mathrm{Cr}{\mathrm{Cl}}_{3}$ under varying external pressures. By integrating high-pressure experimental techniques, including Raman spectroscopy, photoluminescence (PL), magnetizat…


[Phys. Rev. B 112, 115145] Published Thu Sep 25, 2025
25 Sep 2025 at 12:00pm
Pressure-induced phase transitions and asynchronous ferroelectric switching mechanism in ${\mathrm{CuInP}}_{2}{\mathrm{S}}_{6}$
by Pegah Mohammadi and Sobhit Singh
Author(s): Pegah Mohammadi and Sobhit Singh


Recent advancements in two-dimensional van der Waals (vdW) ferroelectric materials have highlighted the significance of both interlayer and intralayer degrees of freedom in governing their functional properties. Among these, ${\mathrm{CuInP}}_{2}{\mathrm{S}}_{6}$ (CIPS) stands out due to the unique …


[Phys. Rev. B 112, 125205] Published Thu Sep 25, 2025
25 Sep 2025 at 12:00pm
Ambient pressure and size-tunable layered polynitride structures constructed from fourfold coordinated ${\mathrm{C}}_{2}{\mathrm{N}}_{8}$ cages
by Dong-Xue Wang (王冬雪), Shuang Liu (刘爽), Zhen Yao (姚震), and Bing-Bing Liu (刘冰冰)
Author(s): Dong-Xue Wang (王冬雪), Shuang Liu (刘爽), Zhen Yao (姚震), and Bing-Bing Liu (刘冰冰)


Polymeric nitrogen (polynitrogen) is attractive candidate for high-energy-density materials due to the significant energy stored in nitrogen-nitrogen bonds. We firstly reported two two-dimensional layered polynitrogen structures (Amm2-${\mathrm{CN}}_{6}$ and Amm2-${\mathrm{CN}}_{10}$) using the ${\m…


[Phys. Rev. B 112, 094114] Published Wed Sep 24, 2025
24 Sep 2025 at 12:00pm
Hydrogen liquid-liquid transition from first principles and machine learning
by Giacomo Tenti, Bastian Jäckl, Kousuke Nakano, Matthias Rupp, and Michele Casula
Author(s): Giacomo Tenti, Bastian Jäckl, Kousuke Nakano, Matthias Rupp, and Michele Casula


The molecular-to-atomic liquid-liquid transition (LLT) in high-pressure hydrogen is a fundamental topic touching domains from planetary science to materials modeling. Yet, the nature of the LLT is still under debate. To resolve it, numerical simulations must cover length and time scales spanning sev…


[Phys. Rev. B 112, 104208] Published Wed Sep 24, 2025
24 Sep 2025 at 12:00pm
Single-crystalline orthorhombic GdAlGe as a rare-earth magnetic Dirac nodal-line metal
by Antu Laha, Juntao Yao, Asish K. Kundu, Niraj Aryal, Anil Rajapitamahuni, Elio Vescovo, Fernando Camino, Kim Kisslinger, Lihua Zhang, Dmytro Nykypanchuk, J. Sears, J. M. Tranquada, Weiguo Yin, and Qiang Li
Author(s): Antu Laha, Juntao Yao, Asish K. Kundu, Niraj Aryal, Anil Rajapitamahuni, Elio Vescovo, Fernando Camino, Kim Kisslinger, Lihua Zhang, Dmytro Nykypanchuk, J. Sears, J. M. Tranquada, Weiguo Yin, and Qiang Li


Crystal engineering is a method for discovering new quantum materials and phases, which may be achieved using external pressure or strain. Chemical pressure is unique in that it generates internal pressure perpetually to the lattice. As an example, GdAlSi from the rare-earth ($R$) $R\mathrm{Al}X$ ($…


[Phys. Rev. B 112, 125155] Published Wed Sep 24, 2025
24 Sep 2025 at 12:00pm
General trends of superconducting pairing and magnetic correlations in the Ruddlesden-Popper nickelate $m$-layered superconductors ${\mathrm{La}}_{m+1}{\mathrm{Ni}}_{m}{\mathrm{O}}_{3m+1}$
by Yang Zhang, Ling-Fang Lin, Adriana Moreo, Satoshi Okamoto, Thomas A. Maier, and Elbio Dagotto
Author(s): Yang Zhang, Ling-Fang Lin, Adriana Moreo, Satoshi Okamoto, Thomas A. Maier, and Elbio Dagotto


We report a comprehensive theoretical analysis of the Ruddlesden-Popper layered nickelates ${\mathrm{La}}_{m+1}{\mathrm{Ni}}_{m}{\mathrm{O}}_{3m+1}$ ($m=1$ to 6) under pressure. These materials have recently received significant attention due to the discovery of superconductivity in some nickelates …


[Phys. Rev. B 112, 094517] Published Tue Sep 23, 2025
23 Sep 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