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.

Spectroscopic evidence for a gold-coloured metallic water solution
by Philip E. Mason


Nature, Published online: 28 July 2021; doi:10.1038/s41586-021-03646-5

Spectroscopic measurements confirm that when water is adsorbed on drops of an alkali alloy at low pressure a gold-coloured metallic layer forms as electrons rapidly move from the drop into the water.
28 Jul 2021 at 12:00am
Competition under pressure
by Stephen D. Wilson


Nature Physics, Published online: 26 July 2021; doi:10.1038/s41567-021-01319-8

Using pressure to tune the balance of interactions in a new class of kagome superconductor results in a surprising competition between states — and hints at an unusual, electronically intertwined order.
26 Jul 2021 at 12:00am
Footprint of greenhouse forcing in daily temperature variability [Earth, Atmospheric, and Planetary Sciences]
by Maximilian Kotz, Leonie Wenz, Anders Levermann
Changes in mean climatic conditions will affect natural and societal systems profoundly under continued anthropogenic global warming. Changes in the high-frequency variability of temperature exert additional pressures, yet the effect of greenhouse forcing thereon has not been fully assessed or identified in observational data. Here, we show that the intramonthly...
2 Aug 2021 at 9:09pm
Quantifying COVID-19 importation risk in a dynamic network of domestic cities and international countries [Environmental Sciences]
by Xiaoyi Han, Yilan Xu, Linlin Fan, Yi Huang, Minhong Xu, Song Gao
Since its outbreak in December 2019, the novel coronavirus 2019 (COVID-19) has spread to 191 countries and caused millions of deaths. Many countries have experienced multiple epidemic waves and faced containment pressures from both domestic and international transmission. In this study, we conduct a multiscale geographic analysis of the spread...
20 Jul 2021 at 8:25pm
Recovery of assessed global fish stocks remains uncertain [Sustainability Science]
by Gregory L. Britten, Carlos M. Duarte, Boris Worm
Concerns over overexploitation have fueled an ongoing debate on the current state and future prospects of global capture fisheries, associated threats to marine biodiversity, and declining yields available for human consumption. Management reforms have aimed to reduce fishing pressure and recover depleted stocks to biomass and exploitation rates that allow...
26 Jul 2021 at 9:02pm
Formation of porous ice frameworks at room temperature [Chemistry]
by Yuan Liu, Weiduo Zhu, Jian Jiang, Chongqin Zhu, Chang Liu, Ben Slater, Lars Oȷamae, Joseph S. Francisco, Xiao Cheng Zeng
Bulk crystalline ices with ultralow densities have been demonstrated to be thermodynamically metastable at negative pressures. However, the direct formation of these bulk porous ices from liquid water at negative pressures is extremely challenging. Inspired by approaches toward porous media based on host–guest chemistry, such as metal–organic frameworks and covalent...
29 Jul 2021 at 8:45pm
A large-scale study of stress, emotions, and blood pressure in daily life using a digital platform [Psychological and Cognitive Sciences]
by Amie M. Gordon, Wendy Berry Mendes
Stress is often associated with pathophysiologic responses, like blood pressure (BP) reactivity, which when experienced repeatedly may be one pathway through which stress leads to poor physical health. Previous laboratory and field studies linking stress to physiological measures are limited by small samples, narrow demographics, and artificial stress manipulations, whereas...
29 Jul 2021 at 8:45pm
Experimental evidence for glass polymorphism in vitrified water droplets [Applied Physical Sciences]
by Johannes Bachler, Johannes Giebelmann, Thomas Loerting
The nature of amorphous ices has been debated for more than 35 years. In essence, the question is whether they are related to ice polymorphs or to liquids. The fact that amorphous ices are traditionally prepared from crystalline ice via pressure-induced amorphization has made a clear distinction tricky. In this...
23 Jul 2021 at 9:37pm
Achieving industrial ammonia synthesis rates at near-ambient conditions through modified scaling relations on a confined dual site [Chemistry]
by Tao Wang, Frank Abild-Pedersen
The production of ammonia through the Haber–Bosch process is regarded as one of the most important inventions of the 20th century. Despite significant efforts in optimizing the process, it still consumes 1 to 2% of the worldwide annual energy for the high working temperatures and pressures. The design of a...
19 Jul 2021 at 9:07pm
Surviving winter on the Qinghai-Tibetan Plateau: Pikas suppress energy demands and exploit yak feces to survive winter [Ecology]
by John R. Speakman, Qingsheng Chi, Łukasz Ołdakowski, Haibo Fu, Quinn E. Fletcher, Catherine Hambly, Jacques Togo, Xinyu Liu, Stuart B. Piertney, Xinghao Wang, Liangzhi Zhang, Paula Redman, Lu Wang, Gangbin Tang, Yongguo Li, Jianguo Cui, Peter J. Thomson, Zengli Wang, Paula Glover, Olivia C. Robertson, Yanming Zhang, Dehua Wang
The Qinghai-Tibetan Plateau, with low precipitation, low oxygen partial pressure, and temperatures routinely dropping below −30 °C in winter, presents several physiological challenges to its fauna. Yet it is home to many endemic mammalian species, including the plateau pika (Ochotona curzoniae). How these small animals that are incapable of hibernation...
19 Jul 2021 at 9:07pm
Repulsive and attractive depletion forces mediated by nonadsorbing polyelectrolytes in the Donnan limit
by Jasper Landman
The Journal of Chemical Physics, Volume DFAOT2021, Issue 1, August 2021.
In mixtures of colloids and nonadsorbing polyelectrolytes, a Donnan potential arises across the region between surfaces that are depleted of the polyelectrolyte and the rest of the system. This Donnan potential tends to shift the polyelectrolyte density profile toward the colloidal surface and leads to the local accumulation of polyelectrolytes. We derive a zero-field theory for the disjoining pressure between two parallel flat plates. The polyelectrolyte is allowed to enter the confined interplate region at the cost of a conformational free energy penalty. The resulting disjoining pressure shows a crossover to a repulsive regime when the interplate separation gets smaller than the size of the polyelectrolyte chain, followed by an attractive part. We find a quantitative match between the model and self-consistent field computations that take into account the full Poisson–Boltzmann electrostatics.
23 Apr 2021 at 1:56pm
Coexistence of Surface Superconducting and Three-Dimensional Topological Dirac States in Semimetal KZnBi
by Junseong Song, Sunghun Kim, Youngkuk Kim, Huixia Fu, Jahyun Koo, Zhen Wang, Gyubin Lee, Jouhahn Lee, Sang Ho Oh, Joonho Bang, Taku Matsushita, Nobuo Wada, Hiroki Ikegami, Jonathan D. Denlinger, Young Hee Lee, Binghai Yan, Yeongkwan Kim, and Sung Wng Kim
Author(s): Junseong Song, Sunghun Kim, Youngkuk Kim, Huixia Fu, Jahyun Koo, Zhen Wang, Gyubin Lee, Jouhahn Lee, Sang Ho Oh, Joonho Bang, Taku Matsushita, Nobuo Wada, Hiroki Ikegami, Jonathan D. Denlinger, Young Hee Lee, Binghai Yan, Yeongkwan Kim, and Sung Wng Kim


A newly discovered 3D topological Dirac semimetal exhibits surface superconductivity at ambient pressure, a key step in the development of systems sought after for quantum computation.


[Phys. Rev. X 11, 021065] Published Mon Jun 28, 2021
28 Jun 2021 at 12:00pm
Electronic structure of the bond disproportionated bismuthate ${\mathrm{Ag}}_{2}{\mathrm{BiO}}_{3}$
by Mohamed Oudah, Minu Kim, Ksenia S. Rabinovich, Kateryna Foyevtsova, Graham McNally, Berkay Kilic, Kathrin Küster, Robert Green, Alexander V. Boris, George Sawatzky, Andreas P. Schnyder, D. A. Bonn, Bernhard Keimer, and Hidenori Takagi
Author(s): Mohamed Oudah, Minu Kim, Ksenia S. Rabinovich, Kateryna Foyevtsova, Graham McNally, Berkay Kilic, Kathrin Küster, Robert Green, Alexander V. Boris, George Sawatzky, Andreas P. Schnyder, D. A. Bonn, Bernhard Keimer, and Hidenori Takagi


We present a comprehensive study on the silver bismuthate ${\mathrm{Ag}}_{2}{\mathrm{BiO}}_{3}$, synthesized under high-pressure, high-temperature conditions, which has been the subject of recent theoretical work on topologically complex electronic states. We present x-ray photoelectron spectroscopy...


[Phys. Rev. Materials 5, 064202] Published Thu Jun 24, 2021
24 Jun 2021 at 12:00pm
$\mathrm{La}{\mathrm{BH}}_{8}$: Towards high-${T}_{c}$ low-pressure superconductivity in ternary superhydrides
by Simone Di Cataldo, Christoph Heil, Wolfgang von der Linden, and Lilia Boeri
Author(s): Simone Di Cataldo, Christoph Heil, Wolfgang von der Linden, and Lilia Boeri


In the last five years a large number of new high-temperature superconductors have been predicted and experimentally discovered among hydrogen-rich crystals, at pressures, which are way too high to meet any practical application. In this paper, we report the computational prediction of a hydride sup...


[Phys. Rev. B 104, L020511] Published Thu Jul 29, 2021
29 Jul 2021 at 12:00pm
Bose-Luttinger liquids
by Ethan Lake, T. Senthil, and Ashvin Vishwanath
Author(s): Ethan Lake, T. Senthil, and Ashvin Vishwanath


The authors theoretically investigate theoretically exotic phases of matter, dubbed “Bose-Luttinger liquids,” which can loosely be thought of as bosonic Fermi liquids. Despite being bosonic and consequently lacking degeneracy pressure, these systems posses a bosonic analog of a Fermi surface. Unlike Fermi liquids, however, these systems have no quasiparticles, and exhibit operators whose scaling dimensions can be tuned continuously. The authors suggest that these ideas may be relevant for understanding the non-Fermi-liquid phase of MnSi.


[Phys. Rev. B 104, 014517] Published Mon Jul 26, 2021
26 Jul 2021 at 12:00pm
Hydrostaticity in high pressure experiments: some general observations and guidelines for high pressure experimenters
by K. Takemura
Volume 41, Issue 2, June 2021, Page 155-174
.

25 Mar 2021 at 6:06am
Nonstoichiometric Fe–V–Al full Heusler alloys under high pressure: thermoelectric properties
by I. V. Korobeynikov
Volume 41, Issue 2, June 2021, Page 184-197
.

15 May 2021 at 9:44am
Using high hydrostatic pressure as an abiotic elicitor strategy for improving capsaicin production in free and immobilized cell suspension cultures of Capsicum annuum L.
by Cemil İşlek
Volume 41, Issue 2, June 2021, Page 198-208
.

25 Mar 2021 at 6:03am
Chilled storage stability of spice marinated and high pressure processed Indian white prawns (Fenneropenaeus indicus)
by Ginson Joseph
.

31 Jul 2021 at 2:34pm
High pressure stability of β-Zr: no evidence for isostructural phase transitions
by E. F. O’Bannon III
.

30 Jul 2021 at 8:30am
Elastic properties of Mg-phase D at high pressure
by Chaowen Xu
.

26 Jul 2021 at 2:45pm
Inhibitory effect of high hydrostatic pressure, nisin, and moderate heating on the inactivation of Paenibacillus sp. and Terribacillus aidingensis spores isolated from UHT milk
by Souhir Kmiha
.

1 Jul 2021 at 1:08pm
Continuous measurement of ultrasonic elastic wave velocities, X-ray radiography and X-ray diffraction of Zr50Cu40Al10 metallic glass at high pressure and high temperature conditions
by Yoshio Kono
.

21 Jun 2021 at 8:59am