EHPRG: The European High Pressure Research Group

Welcome

 

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.

Upcoming EHPRG Meeting

 

The 57th European High Pressure Research Group Meeting on High Pressure Science and Technology (EHPRG-2019) will be held in Prague, Czech Republic, from 1st to 6th September 2019. The 57th EHPRG Meeting will be chaired by Jiří Prchal (Charles University, Prague, Czech Republic).
For more information, please visit the official webpage of the 57th EHPRG Meeting.

High-pressure in the headlines

 

Selection of high-pressure related titles from top scientific journals.

    High-pressure research and a return to China: meet Haiyan Zheng
    by Sarah O’Meara

    High-pressure research and a return to China: meet Haiyan Zheng

    High-pressure research and a return to China: meet Haiyan Zheng, Published online: 20 March 2019; doi:10.1038/d41586-019-00887-3

    The chemist talks about her work at a Beijing research institute, and about equality in Chinese science.
    20 Mar 2019 at 12:00am
    Pressure promoted low-temperature melting of metal–organic frameworks
    by Remo N. Widmer

    Pressure promoted low-temperature melting of metal–organic frameworks

    Pressure promoted low-temperature melting of metal–organic frameworks, Published online: 18 March 2019; doi:10.1038/s41563-019-0317-4

    The simultaneous high-pressure and high-temperature phase diagram of two MOFs, ZIF-4 and ZIF-62, is mapped. Crystalline, pressure- and temperature-amorphous, and liquid states are found, while melting temperature is found to decrease with pressure.
    18 Mar 2019 at 12:00am
    Herbivores as drivers of negative density dependence in tropical forest saplings
    by Forrister, D. L., Endara, M.-J., Younkin, G. C., Coley, P. D., Kursar, T. A.

    Ecological theory predicts that the high local diversity observed in tropical forests is maintained by negative density–dependent interactions within and between closely related plant species. By using long-term data on tree growth and survival for coexisting Inga (Fabaceae, Mimosoideae) congeners, we tested two mechanisms thought to underlie negative density dependence (NDD): competition for resources and attack by herbivores. We quantified the similarity of neighbors in terms of key ecological traits that mediate these interactions, as well as the similarity of herbivore communities. We show that phytochemical similarity and shared herbivore communities are associated with decreased growth and survival at the sapling stage, a key bottleneck in the life cycle of tropical trees. None of the traits associated with resource acquisition affect plant performance, indicating that competition between neighbors may not shape local tree diversity. These results suggest that herbivore pressure is the primary mechanism driving NDD at the sapling stage.


    14 Mar 2019 at 6:40pm
    Fast pressure-jump all-atom simulations and experiments reveal site-specific protein dehydration-folding dynamics [Biophysics and Computational Biology]
    by Maxim B. Prigozhin, Yi Zhang, Klaus Schulten, Martin Gruebele, Taras V. Pogorelov
    As theory and experiment have shown, protein dehydration is a major contributor to protein folding. Dehydration upon folding can be characterized directly by all-atom simulations of fast pressure drops, which create desolvated pockets inside the nascent hydrophobic core. Here, we study pressure-drop refolding of three λ-repressor fragment (λ6–85) mutants computationally...
    19 Mar 2019 at 6:36pm
    Achievement of Reactor-Relevant Performance in Negative Triangularity Shape in the DIII-D Tokamak
    by M. E. Austin, A. Marinoni, M. L. Walker, M. W. Brookman, J. S. deGrassie, A. W. Hyatt, G. R. McKee, C. C. Petty, T. L. Rhodes, S. P. Smith, C. Sung, K. E. Thome, and A. D. Turnbull
    Author(s): M. E. Austin, A. Marinoni, M. L. Walker, M. W. Brookman, J. S. deGrassie, A. W. Hyatt, G. R. McKee, C. C. Petty, T. L. Rhodes, S. P. Smith, C. Sung, K. E. Thome, and A. D. Turnbull

    Tokamak experiments show that confining the plasma in an elongated inverse D-shape could reduce energy transport at reactor-relevant plasma pressure without disruptive instabilities.


    [Phys. Rev. Lett. 122, 115001] Published Mon Mar 18, 2019
    18 Mar 2019 at 11:00am
    Predicted Pressure-Induced Superconducting Transition in Electride ${\mathrm{Li}}_{6}\mathrm{P}$
    by Ziyuan Zhao, Shoutao Zhang, Tong Yu, Haiyang Xu, Aitor Bergara, and Guochun Yang
    Author(s): Ziyuan Zhao, Shoutao Zhang, Tong Yu, Haiyang Xu, Aitor Bergara, and Guochun Yang

    First-principles swarm structure calculations predict a pressure-induced superconducting phase in the electride, Li6P, at high temperatures.


    [Phys. Rev. Lett. 122, 097002] Published Thu Mar 07, 2019
    7 Mar 2019 at 11:00am
    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
    Multisite Exchange-Enhanced Barocaloric Response in ${\mathrm{Mn}}_{3}\mathrm{NiN}$
    by David Boldrin, Eduardo Mendive-Tapia, Jan Zemen, Julie B. Staunton, Thomas Hansen, Araceli Aznar, Josep-Lluís Tamarit, Maria Barrio, Pol Lloveras, Jiyeob Kim, Xavier Moya, and Lesley F. Cohen
    Author(s): David Boldrin, Eduardo Mendive-Tapia, Jan Zemen, Julie B. Staunton, Thomas Hansen, Araceli Aznar, Josep-Lluís Tamarit, Maria Barrio, Pol Lloveras, Jiyeob Kim, Xavier Moya, and Lesley F. Cohen

    Experiments reveal that Mn3NiN has enormous ability to control heat flow when subjected to mechanical pressure, establishing the family of Mn-antiperovskite materials as promising tools for energy-efficient refrigeration.


    [Phys. Rev. X 8, 041035] Published Wed Nov 28, 2018
    28 Nov 2018 at 11:00am
    Exploring the High-Pressure Materials Genome
    by Maximilian Amsler, Vinay I. Hegde, Steven D. Jacobsen, and Chris Wolverton
    Author(s): Maximilian Amsler, Vinay I. Hegde, Steven D. Jacobsen, and Chris Wolverton

    A new framework for predicting materials behavior at high pressure combines computational approximations with extant materials data to provide a tool for discovering new materials and their properties under nonambient conditions.


    [Phys. Rev. X 8, 041021] Published Fri Nov 09, 2018
    9 Nov 2018 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
    Controlling the interfacial conductance in ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ in ${90}^{∘}$ off-axis sputter deposition
    by Chunhai Yin, Dileep Krishnan, Nicolas Gauquelin, Jo Verbeeck, and Jan Aarts
    Author(s): Chunhai Yin, Dileep Krishnan, Nicolas Gauquelin, Jo Verbeeck, and Jan Aarts

    We report on the fabrication of conducting interfaces between ${\mathrm{LaAlO}}_{3}$ and ${\mathrm{SrTiO}}_{3}$ by ${90}^{∘}$ off-axis sputtering in an Ar atmosphere. At a growth pressure of 0.04 mbar the interface is metallic, with a carrier density of the order of $1×{10}^{13}\phantom{\rule{4pt}{0...


    [Phys. Rev. Materials 3, 034002] Published Tue Mar 12, 2019
    12 Mar 2019 at 11:00am
    Giant power output in lead-free ferroelectrics by shock-induced phase transition
    by Zhipeng Gao, Wei Peng, Bin Chen, Simon A. T. Redfern, Ke Wang, Baojin Chu, Qiang He, Yi Sun, Xuefeng Chen, Hengchang Nie, Wen Deng, Lingkong Zhang, Hongliang He, Genshui Wang, and Xianlin Dong
    Author(s): Zhipeng Gao, Wei Peng, Bin Chen, Simon A. T. Redfern, Ke Wang, Baojin Chu, Qiang He, Yi Sun, Xuefeng Chen, Hengchang Nie, Wen Deng, Lingkong Zhang, Hongliang He, Genshui Wang, and Xianlin Dong

    The force-electric effect in ferroelectrics is characterized by the release of bound charge during pressure/shock-induced depolarization. In contrast to other electrical energy storage systems, the charge-storage/release by the force-electric effect of ferroelectrics is determined by polarization sw...


    [Phys. Rev. Materials 3, 035401] Published Mon Mar 11, 2019
    11 Mar 2019 at 11:00am
    Superconductor-insulator transition driven by pressure-tuned intergrain coupling in nanodiamond films
    by Gufei Zhang, Yonghui Zhou, Svetlana Korneychuk, Tomas Samuely, Liwang Liu, Paul W. May, Zheng Xu, Oleksandr Onufriienko, Xuefeng Zhang, Johan Verbeeck, Peter Samuely, Victor V. Moshchalkov, Zhaorong Yang, and Horst-Günter Rubahn
    Author(s): Gufei Zhang, Yonghui Zhou, Svetlana Korneychuk, Tomas Samuely, Liwang Liu, Paul W. May, Zheng Xu, Oleksandr Onufriienko, Xuefeng Zhang, Johan Verbeeck, Peter Samuely, Victor V. Moshchalkov, Zhaorong Yang, and Horst-Günter Rubahn

    We report on the pressure-driven superconductor-insulator transition in heavily boron-doped nanodiamond films. By systematically increasing the pressure, we suppress the Josephson coupling between the superconducting nanodiamond grains. The diminished intergrain coupling gives rise to an overall ins...


    [Phys. Rev. Materials 3, 034801] Published Tue Mar 05, 2019
    5 Mar 2019 at 11:00am
    Raman spectroscopy evidence for dimerization and Mott collapse in $α\text{−}{\mathrm{RuCl}}_{3}$ under pressures
    by Gaomin Li, Xiaobin Chen, Yuan Gan, Fenglei Li, Mingqi Yan, Fan Ye, Shenghai Pei, Yujun Zhang, Le Wang, Huimin Su, Junfeng Dai, Yuanzhen Chen, Youguo Shi, XinWei Wang, Liyuan Zhang, Shanmin Wang, Dapeng Yu, Fei Ye, Jia-Wei Mei, and Mingyuan Huang
    Author(s): Gaomin Li, Xiaobin Chen, Yuan Gan, Fenglei Li, Mingqi Yan, Fan Ye, Shenghai Pei, Yujun Zhang, Le Wang, Huimin Su, Junfeng Dai, Yuanzhen Chen, Youguo Shi, XinWei Wang, Liyuan Zhang, Shanmin Wang, Dapeng Yu, Fei Ye, Jia-Wei Mei, and Mingyuan Huang

    We perform Raman spectroscopy studies on $α\text{−}{\mathrm{RuCl}}_{3}$ at room temperature to investigate its phase transitions of magnetism and structure under pressure. The Raman measurements resolve two critical pressures at ${p}_{1}=1.1$ GPa and ${p}_{2}=1.7$ GPa with very different structural ...


    [Phys. Rev. Materials 3, 023601] Published Fri Feb 08, 2019
    8 Feb 2019 at 11:00am
    Strong electronic correlations and Fermi surface reconstruction in the quasi-one-dimensional iron superconductor ${\mathrm{BaFe}}_{2}{\mathrm{S}}_{3}$
    by J. M. Pizarro and E. Bascones
    Author(s): J. M. Pizarro and E. Bascones

    ${\mathrm{BaFe}}_{2}{\mathrm{S}}_{3}$ is a special iron superconductor with a two-leg ladder structure, which can help to unravel the role played by the electronic correlations in high-${T}_{c}$ superconductivity. At zero pressure, it is insulating with stripe antiferromagnetic (AF) order and it has...


    [Phys. Rev. Materials 3, 014801] Published Thu Jan 31, 2019
    31 Jan 2019 at 11:00am
    Variation in the nature of the neutral-ionic transition in $\mathrm{DMTTF}−{\mathrm{QCl}}_{4}$ under pressure probed by NQR and NMR
    by K. Sunami, F. Iwase, K. Miyagawa, S. Horiuchi, K. Kobayashi, R. Kumai, and K. Kanoda
    Author(s): K. Sunami, F. Iwase, K. Miyagawa, S. Horiuchi, K. Kobayashi, R. Kumai, and K. Kanoda

    We have investigated the microscopic charge/lattice/spin states in the neutral-ionic transition material $\mathrm{DMTTF}−{\mathrm{QCl}}_{4}$ under pressure by $^{35}\mathrm{Cl}−\mathrm{NQR}$ and $^{1}\mathrm{H}−\mathrm{NMR}$ measurements to reveal the mechanism of the phase transition and the nature...


    [Phys. Rev. B 99, 125133] Published Wed Mar 20, 2019
    20 Mar 2019 at 11:00am
    Pressure-induced collapse of the spin-orbital Mott state in the hyperhoneycomb iridate $β−{\mathrm{Li}}_{2}{\mathrm{IrO}}_{3}$
    by T. Takayama, A. Krajewska, A. S. Gibbs, A. N. Yaresko, H. Ishii, H. Yamaoka, K. Ishii, N. Hiraoka, N. P. Funnell, C. L. Bull, and H. Takagi
    Author(s): T. Takayama, A. Krajewska, A. S. Gibbs, A. N. Yaresko, H. Ishii, H. Yamaoka, K. Ishii, N. Hiraoka, N. P. Funnell, C. L. Bull, and H. Takagi

    Hyperhoneycomb iridate $β−{\mathrm{Li}}_{2}{\mathrm{IrO}}_{3}$ is a three-dimensional analog of two-dimensional honeycomb iridates, such as $α−{\mathrm{Li}}_{2}{\mathrm{IrO}}_{3}$, which recently appeared as another playground for the physics of Kitaev-type spin liquid. $β−{\mathrm{Li}}_{2}{\mathrm{...


    [Phys. Rev. B 99, 125127] Published Mon Mar 18, 2019
    18 Mar 2019 at 11:00am
    NMR and ab initio study of gallium metal under pressure
    by R. Řezníček, V. Chlan, and J. Haase
    Author(s): R. Řezníček, V. Chlan, and J. Haase

    Gallium metal possesses a complex phase diagram and it has been the subject of many experimental and theoretical studies. Nevertheless, hyperfine properties of its phases requiring higher pressure beyond the liquid-I-II triple point were seldom examined. In this work, hyperfine parameters of liquid ...


    [Phys. Rev. B 99, 125121] Published Fri Mar 15, 2019
    15 Mar 2019 at 11:00am
    Observation of subkelvin superconductivity in ${\mathrm{Cd}}_{3}{\mathrm{As}}_{2}$ thin films
    by A. V. Suslov, A. B. Davydov, L. N. Oveshnikov, L. A. Morgun, K. I. Kugel, V. S. Zakhvalinskii, E. A. Pilyuk, A. V. Kochura, A. P. Kuzmenko, V. M. Pudalov, and B. A. Aronzon
    Author(s): A. V. Suslov, A. B. Davydov, L. N. Oveshnikov, L. A. Morgun, K. I. Kugel, V. S. Zakhvalinskii, E. A. Pilyuk, A. V. Kochura, A. P. Kuzmenko, V. M. Pudalov, and B. A. Aronzon

    We report an experimental observation of superconductivity in ${\mathrm{Cd}}_{3}{\mathrm{As}}_{2}$ thin films without application of external pressure. The films under study were synthesized by magnetron sputtering. Surface studies suggest that the observed transport characteristics are related to t...


    [Phys. Rev. B 99, 094512] Published Thu Mar 14, 2019
    14 Mar 2019 at 11:00am