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.

Sleep pressure modulates single-neuron synapse number in zebrafish
by Anya Suppermpool


Nature, Published online: 01 May 2024; doi:10.1038/s41586-024-07367-3

Synapses are gained during spontaneous or forced periods of wake and lost during sleep in a neuron-subtype-dependent manner in zebrafish.
1 May 2024 at 12:00am
Superconductivity hunt gets boost from China’s $220 million physics ‘playground’
by Gemma Conroy


Nature, Published online: 29 April 2024; doi:10.1038/d41586-024-01192-4

From extreme cold to strong magnets and high pressures, the Synergetic Extreme Condition User Facility (SECUF) provides conditions for researching potential wonder materials.
29 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
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
Importance of the semimetallic state for the quantum Hall effect in ${\mathrm{HfTe}}_{5}$
by M. M. Piva, R. Wawrzyńczak, Nitesh Kumar, L. O. Kutelak, G. A. Lombardi, R. D. dos Reis, C. Felser, and M. Nicklas
Author(s): M. M. Piva, R. Wawrzyńczak, Nitesh Kumar, L. O. Kutelak, G. A. Lombardi, R. D. dos Reis, C. Felser, and M. Nicklas


At ambient pressure, ${\mathrm{HfTe}}_{5}$ is a material at the boundary between a weak and a strong topological phase, which can be tuned by changes in its crystalline structure or by the application of high magnetic fields. It exhibits a Lifshitz transition upon cooling, and three-dimensional (3D)…


[Phys. Rev. Materials 8, L041202] Published Mon Apr 29, 2024
29 Apr 2024 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
${\mathrm{H}}_{4}{\mathrm{O}}^{2+}$ ion stabilized by pressure
by Jingyu Hou, Haixu Cui, Artem R. Oganov, Han-Fei Li, Xiao-Ji Weng, Xiang-Feng Zhou, Hui-Tian Wang, and Xiao Dong
Author(s): Jingyu Hou, Haixu Cui, Artem R. Oganov, Han-Fei Li, Xiao-Ji Weng, Xiang-Feng Zhou, Hui-Tian Wang, and Xiao Dong


Aquodiium (${\mathrm{H}}_{4}{\mathrm{O}}^{2+}$), an isoelectronic analog of the ammonium ion (${\mathrm{NH}}_{4}^{+}$), can theoretically be formed by combining a molecule of water (${\mathrm{H}}_{2}\mathrm{O}$) with two protons. However, stable aquodiium has never been reported because of the high …


[Phys. Rev. B 109, 174102] Published Wed May 01, 2024
1 May 2024 at 12:00pm
Predicted pressure-induced s-d electron transition of hydrogen in electride ${({\mathrm{Na}}_{2}\mathrm{He})}_{4}\mathrm{H}$
by Yan Gao, Tian Cui, and Da Li
Author(s): Yan Gao, Tian Cui, and Da Li


Unexpected pressure-induced s-d electron transition had been observed in various $s$-block metals. However, it is noteworthy that no such transition has been reported for hydrogen, a unique element within the $s$ block of the periodic table. Here, we propose using a zero-dimensional electride state,…


[Phys. Rev. B 109, 184102] Published Wed May 01, 2024
1 May 2024 at 12:00pm
Prediction of stability of tenfold-coordinated silica up to 200 TPa pressure based on ab initio calculations with all-electron pseudopotentials
by Chuan Wang, Meng Lv, Ronghao Hu, Junqing Wang, and Yang Zhao
Author(s): Chuan Wang, Meng Lv, Ronghao Hu, Junqing Wang, and Yang Zhao


The ultrahigh-pressure structural evolution and phase diagram of silica (${\mathrm{SiO}}_{2}$) from 10 TPa (${10}^{12}\phantom{\rule{0.16em}{0ex}}\mathrm{Pa}$) to 200 TPa are studied. Using a combination of ab initio simulations and a structure search algorithm, we reveal the phase diagram of ${\mat…


[Phys. Rev. B 109, 134112] Published Fri Apr 26, 2024
26 Apr 2024 at 12:00pm
Correlation effects and concomitant two-orbital ${s}_{±}$-wave superconductivity in ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ under high pressure
by Yi-Heng Tian, Yin Chen, Jia-Ming Wang, Rong-Qiang He, and Zhong-Yi Lu
Author(s): Yi-Heng Tian, Yin Chen, Jia-Ming Wang, Rong-Qiang He, and Zhong-Yi Lu


High-${T}_{c}$ superconductivity (SC) has been found experimentally in the bilayer material ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ under high pressure recently, in which the Ni-$3{d}_{3{z}^{2}−{r}^{2}}$ and $3{d}_{{x}^{2}−{y}^{2}}$ orbitals are expected to play a key role in the electr…


[Phys. Rev. B 109, 165154] Published Fri Apr 26, 2024
26 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
Pressure and non-ideal axial ratio effects on thermodynamic properties of hexagonal close-packed Mg and Zn metals
by Nguyen Thi HongTran Thi HaiNguyen Thi DungHo Khac Hieua Hong Duc University, Dong Ve, Viet Namb Institute of Research and Development, Duy Tan University, Hai Chau, Viet Namc Faculty of Environmental and Natural Sciences, Duy Tan University, Hai Chau, Viet Nam
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23 Apr 2024 at 6:27am
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
Dissociation behavior of microbial nitrilase in temperature-pressure plane studied by using high pressure near-ultraviolet circular dichroism spectroscopy
by Ryo IshiguroTetsuro FujisawaFaculty of Engineering, Gifu University, Gifu, Japan
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20 Apr 2024 at 8:23am