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.

Plantations take economic pressure off natural forests
by Jaboury Ghazoul


Nature, Published online: 18 June 2019; doi:10.1038/d41586-019-01878-0

Plantations take economic pressure off natural forests
18 Jun 2019 at 12:00am
‘I’ll work on it over the weekend’: high workload and other pressures faced by early-career researchers
by Toma Susi


Nature, Published online: 17 June 2019; doi:10.1038/d41586-019-01914-z

Stress and long working hours are regrettably common among early-career researchers, reveals a survey by the Young Academy of Europe.
17 Jun 2019 at 12:00am
Hydraulic control of mammalian embryo size and cell fate
by Chii Jou Chan


Nature, Published online: 12 June 2019; doi:10.1038/s41586-019-1309-x

A mouse blastocyst model reveals how lumenal pressure, cell cortical tension and tissue stiffness act at the tissue scale to regulate embryo size, which in turn influences the division pattern of trophectoderm cells and their fate specification.
12 Jun 2019 at 12:00am
State variables for glasses: The case of amorphous ice
by Nicolas Giovambattista
The Journal of Chemical Physics, Volume 150, Issue 22, June 2019.
Glasses are out-of-equilibrium systems whose state cannot be uniquely defined by the usual set of equilibrium state variables. Here, we seek to identify an expanded set of variables that uniquely define the state of a glass. The potential energy landscape (PEL) formalism is a useful approach within statistical mechanics to describe supercooled liquids and glasses. We use the PEL formalism and computer simulations to study the transformations between low-density amorphous ice (LDA) and high-density amorphous ice (HDA). We employ the ST2 water model, which exhibits an abrupt first-order-like phase transition from LDA to HDA, similar to that observed in experiments. We prepare a number of distinct samples of both LDA and HDA that have completely different preparation histories. We then study the evolution of these LDA and HDA samples during compression and decompression at temperatures sufficiently low that annealing is absent and also during heating. We find that the evolution of each glass sample, during compression/decompression or heating, is uniquely determined by six macroscopic properties of the initial glass sample. These six quantities consist of three conventional thermodynamic state variables, the number of molecules N, the system volume V, and the temperature T, as well as three properties of the PEL, the inherent structure (IS) energy EIS, the IS pressure PIS, and the average curvature of the PEL at the IS [math]. In other words, [math] are state variables that define the glass state in the case of amorphous ice. An interpretation of our results in terms of the PEL formalism is provided. Since the behavior of water in the glassy state is more complex than for most substances, our results suggest that these six state variables may be applicable to amorphous solids in general and that there may be situations in which fewer than six variables would be sufficient to define the state of a glass.
10 Jun 2019 at 8:20am
Vibrational dynamics of confined supercooled water
by E. Stefanutti
The Journal of Chemical Physics, Volume 150, Issue 22, June 2019.
The quest for a possible liquid-liquid coexistence line in supercooled water below its homogeneous nucleation temperature is faced by confining water within a porous silica substrate (MCM-41). This system is investigated by synchrotron radiation infrared spectroscopy, exploring both the intramolecular and the intermolecular vibrational dynamics, in the temperature range from ambient down to ∼120 K, along several isobaric paths between 0.7 kbar and 3.0 kbar. Upon lowering the temperature, the OH-stretching band shows that the intramolecular vibrational dynamics continuously evolves from predominantly liquidlike to predominantly icelike. An abrupt change in the line shape of the intermolecular vibrational band between 220 K and 240 K, depending on the pressure, is the signature of nucleation of ice within the MCM-41 pores. These findings do not support the presence of two liquid phases and provide evidence for the coexistence of liquid water and ice in water confined in MCM-41.
12 Jun 2019 at 5:32am
Effect of OH groups on the polyamorphic transition of polyol aqueous solutions
by Yoshiharu Suzuki
The Journal of Chemical Physics, Volume 150, Issue 22, June 2019.
Polyamorphic transition in water is expected to occur at low temperatures and high pressures. Recently, the polyamorphic transitions of polyol aqueous solutions were examined under pressure at low temperatures, and the location of their liquid-liquid critical points was estimated experimentally. The addition of polyol solute in water induces the shift of polyamorphic transition pressure toward the lower pressure side. Here, by comparing the polyamorphic transition of various polyol aqueous solutions, especially by comparing those of dilute 1,2-propanediol and dilute 1,3-propanediol aqueous solutions, it is clarified that the OH-groups in the polyol molecule efficiently affect the polyamorphic behavior of solvent water. This suggests that the hydrogen bonding interaction between solvent water and polyol solute relates closely to the polyamorphic behavior of solvent water such as the stabilization of high-density-amorph-like solvent water induced by the presence of polyol solute. In addition, the effect of CH3 groups in the 1,2-propanediol molecule seems to be opposite to the effect of OH groups. These results have important implications for the understandings of low-temperature phenomena of aqueous solutions, for example, hydration, segregation, phase separation, folding/unfolding of macromolecules, glass forming, and nucleation of crystalline ice Ih.
14 Jun 2019 at 4:37am
Large Enhancement of Thermoelectric Efficiency Due to a Pressure-Induced Lifshitz Transition in SnSe
by T. Nishimura, H. Sakai, H. Mori, K. Akiba, H. Usui, M. Ochi, K. Kuroki, A. Miyake, M. Tokunaga, Y. Uwatoko, K. Katayama, H. Murakawa, and N. Hanasaki
Author(s): T. Nishimura, H. Sakai, H. Mori, K. Akiba, H. Usui, M. Ochi, K. Kuroki, A. Miyake, M. Tokunaga, Y. Uwatoko, K. Katayama, H. Murakawa, and N. Hanasaki


The Lifshitz transition, a change in Fermi surface topology, is likely to greatly influence exotic correlated phenomena in solids, such as high-temperature superconductivity and complex magnetism. However, since the observation of Fermi surfaces is generally difficult in the strongly correlated syst...


[Phys. Rev. Lett. 122, 226601] Published Fri Jun 07, 2019
7 Jun 2019 at 12:00pm
Persistent Octahedral Coordination in Amorphous ${\mathrm{GeO}}_{2}$ Up to 100 GPa by $\mathrm{K}{β}^{′′}$ X-Ray Emission Spectroscopy
by G. Spiekermann, M. Harder, K. Gilmore, P. Zalden, Ch. J. Sahle, S. Petitgirard, M. Wilke, N. Biedermann, C. Weis, W. Morgenroth, J. S. Tse, E. Kulik, N. Nishiyama, H. Yavaş, and C. Sternemann
Author(s): G. Spiekermann, M. Harder, K. Gilmore, P. Zalden, Ch. J. Sahle, S. Petitgirard, M. Wilke, N. Biedermann, C. Weis, W. Morgenroth, J. S. Tse, E. Kulik, N. Nishiyama, H. Yavaş, and C. Sternemann


X-ray emission spectra reveal that under pressure conditions of Earth’s lower mantle, the compaction mechanism in amorphous germanium dioxide on the atomic scale is similar to that of its crystalline form.


[Phys. Rev. X 9, 011025] Published Wed Feb 06, 2019
6 Feb 2019 at 11:00am
Solids, liquids, and gases under high pressure
by Ho-Kwang Mao, Xiao-Jia Chen, Yang Ding, Bing Li, and Lin Wang
Author(s): Ho-Kwang Mao, Xiao-Jia Chen, Yang Ding, Bing Li, and Lin Wang


The effect of adding high pressure as a control parameter in solids, liquids, and gases expands opportunities to observe unexpected novel phenomena and understand matter in extreme environments. This review on high pressure science highlights subjects ranging from quantum criticality to Earth science. State-of-the-art experimental methods at megabar pressures are also discussed. The proliferation of pressure-induced phases illustrate promising new directions for this field of research.


[Rev. Mod. Phys. 90, 015007] Published Tue Mar 20, 2018
20 Mar 2018 at 11:00am
Colloquium: High pressure and road to room temperature superconductivity
by Lev P. Gor’kov and Vladimir Z. Kresin
Author(s): Lev P. Gor’kov and Vladimir Z. Kresin


Even after three decades of development, high-temperature superconductivity remains one of the most challenging theoretical and experimental areas in condensed matter physics. In this Colloquium some new discoveries in this area are reviewed and possible routes toward much higher transition temperatures are analyzed.


[Rev. Mod. Phys. 90, 011001] Published Tue Jan 09, 2018
9 Jan 2018 at 11:00am
Equations of state for supernovae and compact stars
by M. Oertel, M. Hempel, T. Klähn, and S. Typel
Author(s): M. Oertel, M. Hempel, T. Klähn, and S. Typel


What are the thermodynamic properties of matter at extreme densities, even exceeding nuclear matter density severely? How can we describe the composition of matter for such conditions, the resulting pressure, and the maximum mass of cold neutron stars? How is this affected by finite temperatures, as they occur in core collapse supernovae and in compact star mergers? This review addresses these points within the framework of constraints from experiments as well as astronomical observations.


[Rev. Mod. Phys. 89, 015007] Published Wed Mar 15, 2017
15 Mar 2017 at 11:00am
Ambient conditions disordered-ordered phase transition of two-dimensional interfacial water molecules dependent on charge dipole moment
by Chunlei Wang, Chonghai Qi, Yusong Tu, Xuechuan Nie, and Shanshan Liang
Author(s): Chunlei Wang, Chonghai Qi, Yusong Tu, Xuechuan Nie, and Shanshan Liang


Phase transitions of water molecules are commonly expected to occur only under extreme conditions, such as nanoconfinement, high pressure, or low temperature. We herein report the disordered-ordered phase transition of two-dimensional interfacial water molecules under ambient conditions using molecu...


[Phys. Rev. Materials 3, 065602] Published Mon Jun 03, 2019
3 Jun 2019 at 12:00pm
XMCD study of magnetism and valence state in iron-substituted strontium titanate
by Astera S. Tang, Jonathan Pelliciari, Qi Song, Qian Song, Shuai Ning, John W. Freeland, Riccardo Comin, and Caroline A. Ross
Author(s): Astera S. Tang, Jonathan Pelliciari, Qi Song, Qian Song, Shuai Ning, John W. Freeland, Riccardo Comin, and Caroline A. Ross


Room-temperature ferromagnetism was characterized for thin films of $\mathrm{SrT}{\mathrm{i}}_{0.6}\mathrm{F}{\mathrm{e}}_{0.4}{\mathrm{O}}_{3\text{−}δ}$ grown by pulsed laser deposition on $\mathrm{SrTi}{\mathrm{O}}_{3}$ and Si substrates under different oxygen pressures and after annealing under o...


[Phys. Rev. Materials 3, 054408] Published Fri May 17, 2019
17 May 2019 at 12:00pm
Chemical composition induced quantum phase transition in ${\mathrm{Cs}}_{1−x}{\mathrm{Rb}}_{x}{\mathrm{FeCl}}_{3}$
by S. Hayashida, L. Stoppel, Z. Yan, S. Gvasaliya, A. Podlesnyak, and A. Zheludev
Author(s): S. Hayashida, L. Stoppel, Z. Yan, S. Gvasaliya, A. Podlesnyak, and A. Zheludev


Much of what we know about quantum criticality comes from studies of quantum phase transitions between paramagnetic and magnetically ordered phases. These are usually driven by magnetic field or pressure. Here, the authors report that in CsFeCl3, one of the precious few materials exhibiting pressure-induced magnetic order, a similar transition can also be induced by chemical substitution. Cs1−xRbxFeCl3 continuously evolves from a gapped quantum paramagnet to a critical gapless state and finally to magnetic long-range order. No bulky pressure cells are required, which makes all thermodynamic and spectroscopic properties easily accessible to measurement.


[Phys. Rev. B 99, 224420] Published Mon Jun 17, 2019
17 Jun 2019 at 12:00pm
Estimates of Ta strength at ultrahigh pressures and strain rates using thin-film graded-density impactors
by J. L. Brown, D. P. Adams, C. S. Alexander, J. L. Wise, and M. B. Prime
Author(s): J. L. Brown, D. P. Adams, C. S. Alexander, J. L. Wise, and M. B. Prime


We present results from an experimental technique used to estimate the strength of Ta at extreme pressures (150 GPa) and strain rates (${10}^{7}\phantom{\rule{0.28em}{0ex}}{\mathrm{s}}^{−1}$). A graded-density impactor (GDI) was fabricated using sputter deposition to produce an approximately $40−μ\m...


[Phys. Rev. B 99, 214105] Published Fri Jun 14, 2019
14 Jun 2019 at 12:00pm
Superconductivity by doping in alkali-metal hydrides without applied pressure: An ab initio study
by M. A. Olea-Amezcua, O. De la Peña-Seaman, and R. Heid
Author(s): M. A. Olea-Amezcua, O. De la Peña-Seaman, and R. Heid


The electronic, lattice dynamical, electron-phonon coupling, and superconducting properties of alkali-metal hydrides LiH, NaH, and KH, metalized through doping with alkaline-earth metals Be, Mg, and Ca, respectively, are investigated within the framework of density functional perturbation theory. Th...


[Phys. Rev. B 99, 214504] Published Wed Jun 12, 2019
12 Jun 2019 at 12:00pm
Pressure-induced reentrant transition in $\mathrm{Nb}{\mathrm{S}}_{3}$ phases: Combined Raman scattering and x-ray diffraction study
by M. Abdel-Hafiez, R. Thiyagarajan, A. Majumdar, R. Ahuja, W. Luo, A. N. Vasiliev, A. A. Maarouf, S. G. Zybtsev, V. Ya. Pokrovskii, S. V. Zaitsev-Zotov, V. V. Pavlovskiy, Woei Wu Pai, W. Yang, and L. V. Kulik
Author(s): M. Abdel-Hafiez, R. Thiyagarajan, A. Majumdar, R. Ahuja, W. Luo, A. N. Vasiliev, A. A. Maarouf, S. G. Zybtsev, V. Ya. Pokrovskii, S. V. Zaitsev-Zotov, V. V. Pavlovskiy, Woei Wu Pai, W. Yang, and L. V. Kulik


We report the evolution of charge density wave states under pressure for two $\mathrm{Nb}{\mathrm{S}}_{3}$ phases: triclinic (phase I) and monoclinic (phase II) at room temperature. Raman and x-ray diffraction (XRD) techniques are applied. The x-ray studies on the monoclinic phase under pressure sho...


[Phys. Rev. B 99, 235126] Published Wed Jun 12, 2019
12 Jun 2019 at 12:00pm
Structural and electronic phase transitions of $\mathrm{C}{\mathrm{o}}_{2}\mathrm{T}{\mathrm{e}}_{3}{\mathrm{O}}_{8}$ spiroffite under high pressure
by Nana Li, Bouchaib Manoun, Youssef Tamraoui, Qian Zhang, Haini Dong, Yuming Xiao, Paul Chow, Peter Lazor, Xujie Lü, Yonggang Wang, and Wenge Yang
Author(s): Nana Li, Bouchaib Manoun, Youssef Tamraoui, Qian Zhang, Haini Dong, Yuming Xiao, Paul Chow, Peter Lazor, Xujie Lü, Yonggang Wang, and Wenge Yang


The structural and electronic phase transitions of $\mathrm{C}{\mathrm{o}}_{2}\mathrm{T}{\mathrm{e}}_{3}{\mathrm{O}}_{8}$ spiroffite have been studied with a suite of in situ high-pressure characterization techniques including synchrotron x-ray diffraction, Raman, x-ray emission spectroscopy, UV-vis...


[Phys. Rev. B 99, 245125] Published Wed Jun 12, 2019
12 Jun 2019 at 12:00pm
Synthesis and stability of tantalum hydride at high pressures
by Jianjun Ying, Xue Li, Eran Greenberg, Vitali B. Prakapenka, Hanyu Liu, and Viktor V. Struzhkin
Author(s): Jianjun Ying, Xue Li, Eran Greenberg, Vitali B. Prakapenka, Hanyu Liu, and Viktor V. Struzhkin


Although many metal hydrides were predicted by theory, very few of those were so far realized in experiment. Here, we systematically investigated the Ta-H system below 85 GPa, and found that the hexagonal close-packed $\mathrm{Ta}{\mathrm{H}}_{∼2}$ can be gradually transformed into $\mathrm{Ta}{\mat...


[Phys. Rev. B 99, 224504] Published Tue Jun 11, 2019
11 Jun 2019 at 12:00pm
Magnetic fluctuations in the itinerant ferromagnet ${\mathrm{LaCrGe}}_{3}$ studied by $^{139}\mathrm{La}$ NMR
by K. Rana, H. Kotegawa, R. R. Ullah, J. S. Harvey, S. L. Bud'ko, P. C. Canfield, H. Tou, V. Taufour, and Y. Furukawa
Author(s): K. Rana, H. Kotegawa, R. R. Ullah, J. S. Harvey, S. L. Bud'ko, P. C. Canfield, H. Tou, V. Taufour, and Y. Furukawa


${\mathrm{LaCrGe}}_{3}$ is an itinerant ferromagnet with a Curie temperature of ${T}_{\mathrm{C}}=85$ K and exhibits an avoided ferromagnetic quantum critical point under pressure through a modulated antiferromagnetic phase as well as tricritical wing structure in its temperature-pressure-magnetic f...


[Phys. Rev. B 99, 214417] Published Mon Jun 10, 2019
10 Jun 2019 at 12:00pm
Reactivity of lithium and platinum at elevated densities
by Jack Binns, Miriam Marqués, Philip Dalladay-Simpson, Robin Turnbull, Mungo Frost, Eugene Gregoryanz, and Ross T. Howie
Author(s): Jack Binns, Miriam Marqués, Philip Dalladay-Simpson, Robin Turnbull, Mungo Frost, Eugene Gregoryanz, and Ross T. Howie


Through a series of x-ray diffraction experiments, combined with first-principles calculations, we show that the nobility of platinum can be overcome, reacting with lithium under compression at room temperature. Pressures as low as 2.3 GPa lead to the synthesis of ${\mathrm{Li}}_{11}{\mathrm{Pt}}_{2...


[Phys. Rev. B 99, 220101(R)] Published Mon Jun 10, 2019
10 Jun 2019 at 12:00pm
10th International Conference on High Pressure Bioscience and Biotechnology (HPBB2018)
by Fumiyoshi Abe
Volume 39, Issue 2, June 2019, Page 191-192
.

22 May 2019 at 4:17am
High pressure studies on the misfolding and aggregation of p53 in cancer and of α-synuclein in Parkinson’s disease
by Guilherme A. P. de Oliveira
Volume 39, Issue 2, June 2019, Page 193-201
.

11 Feb 2019 at 6:04am
Pressure-induced structural changes of alanine oligopeptides in aqueous solutions
by Takahiro Takekiyo
Volume 39, Issue 2, June 2019, Page 202-209
.

1 Mar 2019 at 6:42am
Molecular chaperone-like properties of sodium caseinate to suppress the pressure-induced aggregation of β-lactoglobulin
by Jin-Song He
Volume 39, Issue 2, June 2019, Page 210-217
.

11 Feb 2019 at 6:02am
Quantitative analysis of dissociation of LDH by high pressure native PAGE
by Tomoya Miwa
Volume 39, Issue 2, June 2019, Page 218-224
.

11 Jan 2019 at 8:11am
Adaptations for pressure and temperature effects on loop motion in Escherichia coli and Moritella profunda dihydrofolate reductase
by Qi Huang
Volume 39, Issue 2, June 2019, Page 225-237
.

5 Mar 2019 at 9:48am
Salt effect on bilayer phase transitions of dipalmitoylphosphatidylglycerol in saline water under high pressure
by Masaki Goto
Volume 39, Issue 2, June 2019, Page 238-247
.

4 Apr 2019 at 11:11am
Poly 3-hydroxybutyrate-co-3-hydroxyhexanoate films can be degraded by the deep-sea microbes at high pressure and low temperature conditions
by Chiaki Kato
Volume 39, Issue 2, June 2019, Page 248-257
.

1 Mar 2019 at 5:24am
Identification of a regulatory element for yeast tryptophan permease Tat2 ubiquitination using high hydrostatic pressure
by Ryoga Ishii
Volume 39, Issue 2, June 2019, Page 258-266
.

1 Feb 2019 at 6:21am
Critical events leading to cellular mortality of yeast cells following hydrostatic pressure treatment
by Kazuhiro Hamada
Volume 39, Issue 2, June 2019, Page 267-272
.

9 Dec 2018 at 12:44pm
Critical damage to the cellular organelles of Saccharomyces cerevisiae under sublethal conditions upon high pressure carbon dioxide treatment
by Ukyo Takahashi
Volume 39, Issue 2, June 2019, Page 273-279
.

2 May 2019 at 6:40am
High-throughput screening of food additives with synergistic effects on high hydrostatic pressure inactivation of budding yeast
by Akinori Iguchi
Volume 39, Issue 2, June 2019, Page 280-292
.

30 Mar 2019 at 10:22am
Pressure tolerance of Artemia cysts compressed in water medium
by Rachael Hazael
Volume 39, Issue 2, June 2019, Page 293-300
.

4 Feb 2019 at 10:41am
High hydrostatic pressure pasteurization of a draft sake brewed using a Niigata-sake yeast
by Kazuki Nomura
Volume 39, Issue 2, June 2019, Page 301-312
.

30 Mar 2019 at 10:24am
Effect of high hydrostatic pressure on enzyme activity in unpasteurized draft sake
by Toru Shigematsu
Volume 39, Issue 2, June 2019, Page 313-323
.

25 Apr 2019 at 3:58am
Listeria monocytogenes cells injured by high hydrostatic pressure and their recovery in nutrient-rich or -free medium during cold storage
by Yoshiko Nakaura
Volume 39, Issue 2, June 2019, Page 324-333
.

1 Mar 2019 at 3:10am
Effect of plating and incubation conditions on the detection of lactic acid bacteria after high hydrostatic pressure treatment
by Masato Nakane
Volume 39, Issue 2, June 2019, Page 334-343
.

7 Feb 2019 at 5:17am
Evaluation of the effect of high pressure carbon dioxide-pasteurized food on animal health
by Ayane Hibi
Volume 39, Issue 2, June 2019, Page 357-366
.

11 Feb 2019 at 6:08am
Conversion of waste meat to resources by enzymatic reaction under high pressure carbon dioxide conditions
by Tonghuan Yu
Volume 39, Issue 2, June 2019, Page 367-373
.

19 Mar 2019 at 7:25am
Whey proteins-epicatechin interactions in a model specialized food product treated by high pressure
by Valentin Clion
Volume 39, Issue 2, June 2019, Page 374-384
.

2 May 2019 at 4:23am
Effect of high hydrostatic pressure and reducing sodium chloride and phosphate on physicochemical properties of beef gels
by Anastasiia Maksimenko
Volume 39, Issue 2, June 2019, Page 385-397
.

4 Mar 2019 at 2:39am
Enrichment of free amino acid content and reduction of astringent taste compounds in soybean by high hydrostatic pressure
by Shigeaki Ueno
Volume 39, Issue 2, June 2019, Page 398-407
.

6 Apr 2019 at 12:02pm
The effect of high hydrostatic pressure on taste substance distribution in fresh green tea leaves
by Hsiuming Liu
Volume 39, Issue 2, June 2019, Page 408-416
.

25 Apr 2019 at 2:56pm
Modified Bridgman anvils for high pressure synthesis and neutron scattering
by Bianca Haberl
.

17 Jun 2019 at 8:18am
Development of a technique for high pressure neutron diffraction at 40 GPa with a Paris-Edinburgh press
by T. Hattori
.

4 Jun 2019 at 6:21am
Effects of high hydrostatic pressure on β-glucan content, swelling power, starch damage, and pasting properties of high-β-glucan barley flour
by Shigeaki Ueno
.

29 Mar 2019 at 1:58pm