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.

Drift-free iontronic sensing enabled by a creep-free polyelectrolyte elastomer


Nature Materials, Published online: 10 April 2024; doi:10.1038/s41563-024-01851-x

Soft pressure sensors drift under prolonged high stress because of the creep of soft materials, which causes inaccurate measurements. Now, through molecular-level design, a leakage-free and creep-free polyelectrolyte elastomer is synthesized, and an iontronic sensor using the polyelectrolyte elastomer shows very low signal drift under a high static pressure.
10 Apr 2024 at 12:00am

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Record-High ${T}_{c}$ and Dome-Shaped Superconductivity in a Medium-Entropy Alloy TaNbHfZr under Pressure up to 160 GPa
by Liyunxiao Wu, Jianguo Si, Shixue Guan, He Zhang, Jie Dou, Jun Luo, Jie Yang, Hui Yu, Jiawei Zhang, Xiaoli Ma, Pengtao Yang, Rui Zhou, Miao Liu, Fang Hong, and Xiaohui Yu
Author(s): Liyunxiao Wu, Jianguo Si, Shixue Guan, He Zhang, Jie Dou, Jun Luo, Jie Yang, Hui Yu, Jiawei Zhang, Xiaoli Ma, Pengtao Yang, Rui Zhou, Miao Liu, Fang Hong, and Xiaohui Yu


A new medium-entropy alloy, TaNbHfZr, under pressure sets a record high Tc in its class of materials at 15.3 K.


[Phys. Rev. Lett. 132, 166002] Published Tue Apr 16, 2024
16 Apr 2024 at 12:00pm
Feasible Route to High-Temperature Ambient-Pressure Hydride Superconductivity
by Kapildeb Dolui, Lewis J. Conway, Christoph Heil, Timothy A. Strobel, Rohit P. Prasankumar, and Chris J. Pickard
Author(s): Kapildeb Dolui, Lewis J. Conway, Christoph Heil, Timothy A. Strobel, Rohit P. Prasankumar, and Chris J. Pickard


First-principles structure predictions across a very wide range of chemical compositions suggest that the cubic Mg2IrH6 structure is dynamically stable at zero pressure, and is computed to have a Tc of around 160K.


[Phys. Rev. Lett. 132, 166001] Published Mon Apr 15, 2024
15 Apr 2024 at 12:00pm
Exotic Magnetism in Perovskite ${\mathrm{KOsO}}_{3}$
by Jie Chen, Hongze Li, Javier Gainza, Angel Muñoz, Jose A. Alonso, Jue Liu, Yu-Sheng Chen, Alexei A. Belik, Kazunari Yamaura, Jiaming He, Xinyu Li, John B. Goodenough, and J.-S. Zhou
Author(s): Jie Chen, Hongze Li, Javier Gainza, Angel Muñoz, Jose A. Alonso, Jue Liu, Yu-Sheng Chen, Alexei A. Belik, Kazunari Yamaura, Jiaming He, Xinyu Li, John B. Goodenough, and J.-S. Zhou


A new perovskite ${\mathrm{KOsO}}_{3}$ has been stabilized under high-pressure and high-temperature conditions. It is cubic at 500 K ($Pm−3m$) and undergoes subsequent phase transitions to tetragonal at 320 K ($P4/mmm$) and rhombohedral ($R−3m$) at 230 K as shown from refining synchrotron x-ray powd…


[Phys. Rev. Lett. 132, 156701] Published Tue Apr 09, 2024
9 Apr 2024 at 12:00pm
Pressure-Induced Superconductivity In Polycrystalline ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7−δ}$
by G. Wang, N. N. Wang, X. L. Shen, J. Hou, L. Ma, L. F. Shi, Z. A. Ren, Y. D. Gu, H. M. Ma, P. T. Yang, Z. Y. Liu, H. Z. Guo, J. P. Sun, G. M. Zhang, S. Calder, J.-Q. Yan, B. S. Wang, Y. Uwatoko, and J.-G. Cheng
Author(s): G. Wang, N. N. Wang, X. L. Shen, J. Hou, L. Ma, L. F. Shi, Z. A. Ren, Y. D. Gu, H. M. Ma, P. T. Yang, Z. Y. Liu, H. Z. Guo, J. P. Sun, G. M. Zhang, S. Calder, J.-Q. Yan, B. S. Wang, Y. Uwatoko, and J.-G. Cheng


Researchers have measured a zero-resistance state for the nickelate La3Ni2O7, which measurements suggest may superconduct at temperatures above the boiling point of liquid nitrogen.


[Phys. Rev. X 14, 011040] Published Thu Mar 07, 2024
7 Mar 2024 at 11:00am
Smectic and Soap Bubble Optofluidic Lasers
by Zala Korenjak and Matjaž Humar
Author(s): Zala Korenjak and Matjaž Humar


Using a soap bubble, researchers have created a laser that could act as a sensitive sensor for environmental parameters including atmospheric pressure.


[Phys. Rev. X 14, 011002] Published Fri Jan 05, 2024
5 Jan 2024 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
Structural routes to stabilize superconducting ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ at ambient pressure
by Luke C. Rhodes and Peter Wahl
Author(s): Luke C. Rhodes and Peter Wahl


The bilayer perovskite ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ has recently been found to enter a superconducting state under hydrostatic pressure at temperatures as high as 80 K. The onset of superconductivity is observed concurrent with a structural transition which suggests that supe…


[Phys. Rev. Materials 8, 044801] Published Tue Apr 09, 2024
9 Apr 2024 at 12:00pm
Polymorphism of two-dimensional antiferromagnets, ${\mathrm{AgF}}_{2}$ and ${\mathrm{CuF}}_{2}$
by Daniel Jezierski and Wojciech Grochala
Author(s): Daniel Jezierski and Wojciech Grochala


We present a theoretical study of relative stability, as well as of the magnetic and electronic properties, of ${\mathrm{AgF}}_{2}$ and ${\mathrm{CuF}}_{2}$, in two related structural forms: orthorhombic (ambient pressure form of ${\mathrm{AgF}}_{2}$) and monoclinic (ambient pressure form of ${\math…


[Phys. Rev. Materials 8, 034407] Published Tue Mar 26, 2024
26 Mar 2024 at 11:00am
Temperature-induced structural and electronic phase transitions in λ-phase $\mathrm{T}{\mathrm{i}}_{3}{\mathrm{O}}_{5}$
by K. Yoshimatsu, H. Nakao, and H. Kumigashira
Author(s): K. Yoshimatsu, H. Nakao, and H. Kumigashira


Metastable λ-Ti3O5, which undergoes phase transition to other polymorphs by external stimuli such as light, pressure, and temperature, is a candidate material for optolectronic and heat-storage devices. Here, the authors investigate the changes in the electrical and structural properties of λ-Ti3O5 with a single-crystalline thin film form across the temperature-induced phase transition. Resistivity and synchrotron X-ray diffraction measurements unveils a complex phase diagram divided into three temperature regions, which is composed of metal-insulator transition and second-order structural phase transition.


[Phys. Rev. Materials 8, 035002] Published Wed Mar 13, 2024
13 Mar 2024 at 11:00am
Non-Fermi liquid and Hund correlation in ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$ under high pressure
by Jing-Xuan Wang, Zhenfeng Ouyang, Rong-Qiang He, and Zhong-Yi Lu
Author(s): Jing-Xuan Wang, Zhenfeng Ouyang, Rong-Qiang He, and Zhong-Yi Lu


High temperature superconductivity was recently found in the bilayer nickelate ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ (La327), followed by the discovery of superconductivity in the trilayer ${\mathrm{La}}_{4}{\mathrm{Ni}}_{3}{\mathrm{O}}_{10}$ (La4310), under high pressure. Through stu…


[Phys. Rev. B 109, 165140] Published Fri Apr 19, 2024
19 Apr 2024 at 12:00pm
From semiconductor to Fermi metal and emergent density-wave-like transition in the quasi-one-dimensional $n$-type ${\mathrm{Bi}}_{19}{\mathrm{S}}_{27}{\mathrm{I}}_{3}$ under hydrostatic pressure
by Shuxiang Xu, Ziyi Liu, Pengtao Yang, Binbin Ruan, Zhian Ren, Jianping Sun, Yoshiya Uwatoko, Bosen Wang, and Jinguang Cheng
Author(s): Shuxiang Xu, Ziyi Liu, Pengtao Yang, Binbin Ruan, Zhian Ren, Jianping Sun, Yoshiya Uwatoko, Bosen Wang, and Jinguang Cheng


We report on crystal growth and physical properties of the quasi-one-dimensional compound ${\mathrm{Bi}}_{19}{\mathrm{S}}_{27}{\mathrm{I}}_{3}$ by combining crystal structure, electrical resistivity, magnetic properties, Seebeck coefficient, Hall coefficient as well as hydrostatic pressure effect up…


[Phys. Rev. B 109, 144107] Published Wed Apr 17, 2024
17 Apr 2024 at 12:00pm
Pressure-induced large valence transitions in Yb-Cu binary intermetallic systems
by Hitoshi Yamaoka, Ayako Ohmura, Naohito Tsujii, Hirofumi Ishii, Nozomu Hiraoka, Hitoshi Sato, and Masahiro Sawada
Author(s): Hitoshi Yamaoka, Ayako Ohmura, Naohito Tsujii, Hirofumi Ishii, Nozomu Hiraoka, Hitoshi Sato, and Masahiro Sawada


Electronic and crystal structures of $\mathrm{YbCu}, {\mathrm{YbCu}}_{2}$, and ${\mathrm{YbCu}}_{6.5}$ under pressure were studied by high-resolution x-ray absorption spectroscopy (XAS) and x-ray diffraction. We found pressure-induced large valence transitions on the order of 0.3 in these Yb compoun…


[Phys. Rev. B 109, 155147] Published Wed Apr 17, 2024
17 Apr 2024 at 12:00pm
Magnetic phases of electron-doped infinite-layer ${\mathrm{Sr}}_{1−x}{\mathrm{La}}_{x}{\mathrm{CuO}}_{2}$ from first-principles density functional calculations
by Alpin N. Tatan, Jun Haruyama, and Osamu Sugino
Author(s): Alpin N. Tatan, Jun Haruyama, and Osamu Sugino


The magnetic phases of electron-doped infinite-layer ${\mathrm{Sr}}_{1−x}{\mathrm{La}}_{x}{\mathrm{CuO}}_{2}$ are elucidated by first-principles density functional calculations. The antiferromagnetic parent state, metallic transition, as well as lattice evolution with doping and pressure are found t…


[Phys. Rev. B 109, 165134] Published Wed Apr 17, 2024
17 Apr 2024 at 12:00pm
Impact of $\mathrm{CaC}{\mathrm{l}}_{2}$-induced chemical pressure on the phase transition of ${\mathrm{H}}_{2}\mathrm{O}$ at high pressure
by Xinmiao Wei, Xinyang Li, Zihan Zhang, Hanns-Peter Liermann, Sergio Speziale, Mengqiong Pu, Caizi Zhang, Ruiyu Li, Hongyu Yu, Liang Li, Fangfei Li, and Qiang Zhou
Author(s): Xinmiao Wei, Xinyang Li, Zihan Zhang, Hanns-Peter Liermann, Sergio Speziale, Mengqiong Pu, Caizi Zhang, Ruiyu Li, Hongyu Yu, Liang Li, Fangfei Li, and Qiang Zhou


Understanding the phase behavior and structural properties of salt water at high pressures is essential for understanding the dynamics and physical characteristics of icy planets. In this study, we employed high-pressure experimental and ab initio simulation techniques to investigate the impact of $…


[Phys. Rev. B 109, 134108] Published Fri Apr 12, 2024
12 Apr 2024 at 12:00pm
High-pressure synthesis of half-doped perovskites MnV0.5Nb0.5O3 and MnV0.5Ta0.5O3 with unusual A-site small Mn2+ cations
by Xun KangHiroaki HayashiAlexei A. BelikYoshihiro TsujimotoKazunari Yamauraa Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki, Japanb Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido, Japan
Volume 44, Issue 1, March 2024, Page 25-37
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21 Nov 2023 at 6:09am
Scintillator efficiency enhancement potential consequent to the pressure-dependent electronic, optical and elastic properties of CaI2: first-principles calculations
by Pradeep KumarAgnikumar G. Vedeshwara Department of Physics, Hansraj College, University of Delhi, Delhi, Indiab Thin Film Laboratory, Department of Physics & Astrophysics, University of Delhi, Delhi, India
Volume 44, Issue 1, March 2024, Page 69-83
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2 Feb 2024 at 7:12am
Simultaneous compression of NaCl, Au, and ruby: toward mutually consistent pressure scales
by Yanbin WangGuoyin ShenJesse S. Smitha Center for Advanced Radiation Sources, The University of Chicago, Argonne, IL, USAb HPCAT, X-Ray Science Division, Argonne National Laboratory, Argonne, IL, USA
Volume 44, Issue 1, March 2024, Page 53-68
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9 Jan 2024 at 3:57am
Effect of incubation temperature after high hydrostatic pressure treatment of Escherichia coli on the detection of injured populations
by Yoshiko NakauraClaudia SokKazuya MorimatsuKazutaka Yamamotoa Institute of Food Research, National Agriculture and Food Research Organization, Tsukuba, Japanb Food Technology and Biotechnology, Technical University of Munich, Munich, Germanyc Faculty of Agriculture, Ehime University, Matsuyama, Japan
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4 Apr 2024 at 9:13am
Strong resistance to hydrogen embrittlement of high-performance superalloy MP35N under 200 MPa (≈30,000 psi) H2 gas pressure
by S. KlotzL. AmandE. Lelièvre-BernaR. KhasanovM. ElenderB. AnnighöferL. DelbesJ. MauriceC. PayreB. Doisneaua IMPMC, Sorbonne Université Paris, Franceb Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Sorbonne Université, Paris, Francec Institut Laue-Langevin Grenoble, Franced Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, Villigen PSI, Switzerlande Laboratoire Léon Brillouin, CE Saclay, Saclay, France
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18 Apr 2024 at 8:32am
Structure and properties of a quasi-one-dimensional compound BaTiS3 under pressure
by L. C. FuW. J. ChengY. LiuL. C. ShiY. PengJ. ZhangZ. W. LiX. D. LiJ. L. ZhuX. C. WangC. Q. Jina Department of Physics, Southern University of Science and Technology, Shenzhen, People's Republic of Chinab Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, People's Republic of Chinac School of Physics, University of Chinese Academy of Sciences, Beijing, People's Republic of Chinad Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, People's Republic of China
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11 Mar 2024 at 5:32am