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 58th European High Pressure Research Group Meeting on High Pressure Science and Technology (EHPRG-2020) will be held in Tenerife, Spain, from 6th to 11th September 2020. The 58th EHPRG Meeting will be chaired by Alfonso Muñoz Gonzalez (Universidad de La Laguna, Tenerife, Spain).
For more information, please visit the official webpage of the 58th EHPRG Meeting.

High-pressure in the headlines

 

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

    Will the pandemic permanently alter scientific publishing?
    by Ewen Callaway

    Nature, Published online: 03 June 2020; doi:10.1038/d41586-020-01520-4

    The push for rapid and open publishing could take off — although financial pressures lie ahead: part 4 in a series on science after the pandemic.
    3 Jun 2020 at 12:00am
    Ice goes fully cubic
    by Christoph G. Salzmann

    Nature Materials, Published online: 27 May 2020; doi:10.1038/s41563-020-0696-6

    Two independent studies describe the discovery of structurally pure cubic ice Ic made from either ice XVII or a high-pressure hydrogen hydrate.
    27 May 2020 at 12:00am
    Gas chromatography-mass spectrometry analyses of encapsulated stable perovskite solar cells
    by Shi, L., Bucknall, M. P., Young, T. L., Zhang, M., Hu, L., Bing, J., Lee, D. S., Kim, J., Wu, T., Takamure, N., McKenzie, D. R., Huang, S., Green, M. A., Ho-Baillie, A. W. Y.

    Although perovskite solar cells (PSC’s) have produced remarkable energy conversion efficiencies, their underperforming durability is the key challenge for the technology to be commercially viable. In this work, for the first time, we use gas chromatography – mass spectrometry (GC-MS) to reveal signature volatile products of the decomposition of organic hybrid perovskites under thermal stress. In addition, we are able to use GC-MS to confirm that a low-cost polymer/glass stack pressure-tight encapsulation is effective in supressing such outgassing. Using such encapsulation scheme, CH3NH3 (MA) containing multi-cation multi-halide perovskite solar cells survived more than 1800 hours of Damp Heat test and 75 cycles of Humidity Freeze test exceeding the requirement of IEC61215:2016 standard for the first time.


    21 May 2020 at 7:48pm
    In situ X-ray diffraction of silicate liquids and glasses under dynamic and static compression to megabar pressures [Earth, Atmospheric, and Planetary Sciences]
    by Guillaume Morard, Jean-Alexis Hernandez, Marco Guarguaglini, Riccardo Bolis, Alessandra Benuzzi-Mounaix, Tommaso Vinci, Guillaume Fiquet, Marzena A. Baron, Sang Heon Shim, Byeongkwan Ko, Arianna E. Gleason, Wendy L. Mao, Roberto Alonso-Mori, Hae Ja Lee, Bob Nagler, Eric Galtier, Dimosthenis Sokaras, Siegfried H. Glenzer, Denis Andrault, Gaston Garbarino, Mohamed Mezouar, Anja K. Schuster, Alessandra Ravasio
    Properties of liquid silicates under high-pressure and high-temperature conditions are critical for modeling the dynamics and solidification mechanisms of the magma ocean in the early Earth, as well as for constraining entrainment of melts in the mantle and in the present-day core–mantle boundary. Here we present in situ structural measurements...
    2 Jun 2020 at 6:01pm
    High-Pressure Polymeric Nitrogen Allotrope with the Black Phosphorus Structure
    by Dominique Laniel, Bjoern Winkler, Timofey Fedotenko, Anna Pakhomova, Stella Chariton, Victor Milman, Vitali Prakapenka, Leonid Dubrovinsky, and Natalia Dubrovinskaia
    Author(s): Dominique Laniel, Bjoern Winkler, Timofey Fedotenko, Anna Pakhomova, Stella Chariton, Victor Milman, Vitali Prakapenka, Leonid Dubrovinsky, and Natalia Dubrovinskaia

    Studies of polynitrogen phases are of great interest for fundamental science and for the design of novel high energy density materials. Laser heating of pure nitrogen at 140 GPa in a diamond anvil cell led to the synthesis of a polymeric nitrogen allotrope with the black phosphorus structure, bp-N. ...


    [Phys. Rev. Lett. 124, 216001] Published Thu May 28, 2020
    28 May 2020 at 12:00pm
    Plastic and Superionic Helium Ammonia Compounds under High Pressure and High Temperature
    by Cong Liu, Hao Gao, Andreas Hermann, Yong Wang, Maosheng Miao, Chris J. Pickard, Richard J. Needs, Hui-Tian Wang, Dingyu Xing, and Jian Sun
    Author(s): Cong Liu, Hao Gao, Andreas Hermann, Yong Wang, Maosheng Miao, Chris J. Pickard, Richard J. Needs, Hui-Tian Wang, Dingyu Xing, and Jian Sun

    Stable compounds made from helium and ammonia are predicted to form at the extreme pressures found inside Neptune and Uranus.


    [Phys. Rev. X 10, 021007] Published Thu Apr 09, 2020
    9 Apr 2020 at 12:00pm
    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
    Monoclinic semimetal IrSi synthesized under high pressure above 25 GPa: Crystal structure, electronic, and magnetic properties
    by Y. Fujishiro, N. Kanazawa, T. Shinmei, M. Nishi, T. Nakajima, T. Arima, D. Hashizume, M. S. Bahramy, T. Irifune, and Y. Tokura
    Author(s): Y. Fujishiro, N. Kanazawa, T. Shinmei, M. Nishi, T. Nakajima, T. Arima, D. Hashizume, M. S. Bahramy, T. Irifune, and Y. Tokura

    Transition metal monosilicides exhibit diverse physical properties depending on their crystal structures. Regarding IrSi, only the MnP-type orthorhombic form has been known so far. In this paper, the authors report a successful synthesis of a monoclinic phase through high-pressure high-temperature treatment above 25 GPa, while the theoretically predicted B20-type cubic structure has not been identified up to 48 GPa. Magneto-transport measurements reveal a semimetallic nature of the monoclinic form with a low carrier density of ~1019 /cm3. Combined with large Rashba spin splitting of surface electronic bands, monoclinic IrSi may offer a potential material platform for versatile spintronic applications in the two-dimensional limit.


    [Phys. Rev. Materials 4, 055002] Published Fri May 15, 2020
    15 May 2020 at 12:00pm
    Pressure tuning of the anomalous Hall effect in the chiral antiferromagnet ${\mathrm{Mn}}_{3}\mathrm{Ge}$
    by R. D. dos Reis, M. Ghorbani Zavareh, M. O. Ajeesh, L. O. Kutelak, A. S. Sukhanov, Sanjay Singh, J. Noky, Y. Sun, J. E. Fischer, K. Manna, C. Felser, and M. Nicklas
    Author(s): R. D. dos Reis, M. Ghorbani Zavareh, M. O. Ajeesh, L. O. Kutelak, A. S. Sukhanov, Sanjay Singh, J. Noky, Y. Sun, J. E. Fischer, K. Manna, C. Felser, and M. Nicklas

    We report on the pressure evolution of the giant anomalous Hall effect (AHE) in the chiral antiferromagnet ${\mathrm{Mn}}_{3}\mathrm{Ge}$. The AHE originating from the nonvanishing Berry curvature in ${\mathrm{Mn}}_{3}\mathrm{Ge}$ can be continuously tuned by application of hydrostatic pressure. At ...


    [Phys. Rev. Materials 4, 051401(R)] Published Thu May 07, 2020
    7 May 2020 at 12:00pm
    First-order amorphous-to-amorphous phase transitions during lithiation of silicon thin films
    by Jinghui Miao, Baoming Wang, and Carl V. Thompson
    Author(s): Jinghui Miao, Baoming Wang, and Carl V. Thompson

    First-order amorphous-to-amorphous phase transitions (polyamorphic transitions) are rarely observed and have been associated with pressure or temperature changes. The authors report first-order polyamorphic transitions caused by changes in composition. Observations were made during electrochemical insertion of lithium into amorphous silicon films under potentiostatic conditions. Kinetic analyses using the Johnson-Mehl-Avrami-Kolmogorov model applied to measurements of current as a function of time at different overpotentials indicate nucleation and growth of Li-rich phases throughout the volume of the films. This conclusion is supported by electron microscope images of twophase amorphous films with image contrast provided through preferential high energy electron sputtering of Li from Li-rich phases.


    [Phys. Rev. Materials 4, 043608] Published Thu Apr 30, 2020
    30 Apr 2020 at 12:00pm
    Pressure effect on the anomalous Hall effect of ferromagnetic Weyl semimetal $\mathrm{C}{\mathrm{o}}_{3}\mathrm{S}{\mathrm{n}}_{2}{\mathrm{S}}_{2}$
    by Z. Y. Liu, T. Zhang, S. X. Xu, P. T. Yang, Q. Wang, H. C. Lei, Y. Sui, Y. Uwatoko, B. S. Wang, H. M. Weng, J. P. Sun, and J.-G. Cheng
    Author(s): Z. Y. Liu, T. Zhang, S. X. Xu, P. T. Yang, Q. Wang, H. C. Lei, Y. Sui, Y. Uwatoko, B. S. Wang, H. M. Weng, J. P. Sun, and J.-G. Cheng

    The magnetic Weyl semimetal $\mathrm{C}{\mathrm{o}}_{3}\mathrm{S}{\mathrm{n}}_{2}{\mathrm{S}}_{2}$ exhibits large anomalous Hall effect (AHE) due to its nontrivial band topology with enhanced Berry curvature. Here we investigate the pressure effect on the AHE of $\mathrm{C}{\mathrm{o}}_{3}\mathrm{S}...


    [Phys. Rev. Materials 4, 044203] Published Tue Apr 28, 2020
    28 Apr 2020 at 12:00pm
    High pressure investigation of an organic three-dimensional Dirac semimetal candidate having a diamond lattice
    by Andhika Kiswandhi, Mitsuhiko Maesato, Shinya Tomeno, Yukihiro Yoshida, Yasuhiro Shimizu, Prashant Shahi, Jun Gouchi, Yoshiya Uwatoko, Gunzi Saito, and Hiroshi Kitagawa
    Author(s): Andhika Kiswandhi, Mitsuhiko Maesato, Shinya Tomeno, Yukihiro Yoshida, Yasuhiro Shimizu, Prashant Shahi, Jun Gouchi, Yoshiya Uwatoko, Gunzi Saito, and Hiroshi Kitagawa

    $(\mathrm{ET}){\mathrm{Ag}}_{4}{(\mathrm{CN})}_{5}$ [ET = BEDT-TTF: bis(ethylenedithio)tetrathiafulvalene] is a rare example of organic conductors that crystallizes in a diamond structure due to the tetrahedral arrangement of neighboring ET molecules. Because each ET has a $+1$ site charge, the band...


    [Phys. Rev. B 101, 245124] Published Fri Jun 05, 2020
    5 Jun 2020 at 12:00pm
    Ge coordination in $\mathrm{NaAlG}{\mathrm{e}}_{3}{\mathrm{O}}_{8}$ glass upon compression to 131 GPa
    by Marija Krstulović, Angelika D. Rosa, Nicole Biedermann, Georg Spiekermann, Tetsuo Irifune, Manuel Muñoz, and Max Wilke
    Author(s): Marija Krstulović, Angelika D. Rosa, Nicole Biedermann, Georg Spiekermann, Tetsuo Irifune, Manuel Muñoz, and Max Wilke

    Structural transformations at high pressure in $\mathrm{NaAlG}{\mathrm{e}}_{3}{\mathrm{O}}_{8}$ glass were investigated by means of x-ray absorption spectroscopy at the Ge $K$ edge in combination with a diamond anvil cell. The obtained results provide a detailed picture of the local structural behav...


    [Phys. Rev. B 101, 214103] Published Thu Jun 04, 2020
    4 Jun 2020 at 12:00pm
    Approaching the quantum critical point in a highly correlated all-in–all-out antiferromagnet
    by Yishu Wang, T. F. Rosenbaum, D. Prabhakaran, A. T. Boothroyd, and Yejun Feng
    Author(s): Yishu Wang, T. F. Rosenbaum, D. Prabhakaran, A. T. Boothroyd, and Yejun Feng

    All-in–all-out (AIAO) antiferromagnets demonstrate vividly the effects of correlated charge and spin with strong spin-orbit coupling. Here, using resonant magnetic x-ray diffraction, the authors directly track the evolution of AIAO order in the pyrochlore Sm2Ir2O7 across a pressure-tuned quantum critical point. The results demonstrate a powerful approach to the quantum critical state driven by electron correlations U/t and spin orbit coupling λ/t. The authors find prominent Ising-type spin fluctuations under pressure instead of the Heisenberg-type seen via chemical doping. This work also circumscribes the region of interest for the putative magnetic Weyl semimetal state in Pressure-Temperature space.


    [Phys. Rev. B 101, 220404(R)] Published Thu Jun 04, 2020
    4 Jun 2020 at 12:00pm
    Structural distortions in rare-earth transition-metal oxide perovskites under high pressure
    by J.-S. Zhou
    Author(s): J.-S. Zhou

    Owing to their structural complexity and wide range of possible chemical combinations, perovskite oxides exhibit many technically important physical properties. Pressure is a thermodynamic parameter which is useful for tuning physical properties; however, the response of the complex crystal structur...


    [Phys. Rev. B 101, 224104] Published Thu Jun 04, 2020
    4 Jun 2020 at 12:00pm
    ${\mathrm{BaZrO}}_{3}$ stability under pressure: The role of nonlocal exchange and correlation
    by Erik Jedvik Granhed, Göran Wahnström, and Per Hyldgaard
    Author(s): Erik Jedvik Granhed, Göran Wahnström, and Per Hyldgaard

    The ground-state structure of ${\mathrm{BaZrO}}_{3}$ is experimentally known to be cubic down to absolute zero. However, there exist several measured properties and experimental characterizations that earlier computational works have failed to accurately describe and explain within this cubic symmet...


    [Phys. Rev. B 101, 224105] Published Thu Jun 04, 2020
    4 Jun 2020 at 12:00pm
    Superconductivity in Ce-based heavy-fermion systems under high pressure
    by Van-Nham Phan
    Author(s): Van-Nham Phan

    In this paper, the possibility of a superconducting state mediated by the valence fluctuations in Ce-based heavy-fermion systems under high pressure is investigated for the extended periodic Anderson model. In this extended version, an additional local Coulomb repulsion between the localized and con...


    [Phys. Rev. B 101, 245120] Published Thu Jun 04, 2020
    4 Jun 2020 at 12:00pm
    High-pressure structural and electronic properties of $\mathrm{Cu}M{\mathrm{O}}_{2}$ $(M=\mathrm{Cr}, \mathrm{Mn})$ delafossite-type oxides
    by D. Levy, E. Greenberg, S. Layek, M. P. Pasternak, I. Kantor, S. Pascarelli, C. Marini, Z. Konopkova, and G. Kh. Rozenberg
    Author(s): D. Levy, E. Greenberg, S. Layek, M. P. Pasternak, I. Kantor, S. Pascarelli, C. Marini, Z. Konopkova, and G. Kh. Rozenberg

    We report high-pressure x-ray diffraction, x-ray absorption spectroscopy, and electrical transport measurements on $\mathrm{Cu}M{\mathrm{O}}_{2}$ ($M=\mathrm{Cr}$, Mn) delafossitelike oxides in an attempt to study their structural and electronic evolution with pressure. Recent studies of the similar...


    [Phys. Rev. B 101, 245121] Published Thu Jun 04, 2020
    4 Jun 2020 at 12:00pm
    Pressure-induced suppression of ferromagnetism in the itinerant ferromagnet ${\mathrm{LaCrSb}}_{3}$
    by Z. E. Brubaker, J. S. Harvey, J. R. Badger, R. R. Ullah, D. J. Campbell, Y. Xiao, P. Chow, C. Kenney-Benson, J. S. Smith, C. Reynolds, J. Paglione, R. J. Zieve, J. R. Jeffries, and V. Taufour
    Author(s): Z. E. Brubaker, J. S. Harvey, J. R. Badger, R. R. Ullah, D. J. Campbell, Y. Xiao, P. Chow, C. Kenney-Benson, J. S. Smith, C. Reynolds, J. Paglione, R. J. Zieve, J. R. Jeffries, and V. Taufour

    The experimental characterization of materials under high pressure is often limited to a few properties. Usually, this is insufficient for a detailed understanding of the underlying physics. Here, the authors report a suite of high-pressure experiments probing the ferromagnetic state in LaCrSb3. They assess the Curie temperature, crystal structure, and evolution of the magnetic moment as obtained from the integrated absolute difference in x-ray emission spectroscopy. The Curie temperature appears to be driven by the Cr moment, which decreases smoothly in contrast to the pair of steplike decrease features predicted by density functional theory.


    [Phys. Rev. B 101, 214408] Published Wed Jun 03, 2020
    3 Jun 2020 at 12:00pm
    Room-temperature polar metal stabilized under high pressure
    by J.-J. Gao, S.-Y. Fu, K. Yamaura, J. F. Lin, and J.-S. Zhou
    Author(s): J.-J. Gao, S.-Y. Fu, K. Yamaura, J. F. Lin, and J.-S. Zhou

    $\mathrm{LiOs}{\mathrm{O}}_{3}$ synthesized under high pressure in recent years is a rare metal since it undergoes a nonpolar to polar phase transition at ${T}_{s}=140\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. Forming a polar axis through a phase transition in a metal seems against common sense. It is...


    [Phys. Rev. B 101, 220101(R)] Published Tue Jun 02, 2020
    2 Jun 2020 at 12:00pm
    Metal-insulator and magnetic phase diagram of ${\mathrm{Ca}}_{2}{\mathrm{RuO}}_{4}$ from auxiliary field quantum Monte Carlo and dynamical mean field theory
    by Hongxia Hao, Antoine Georges, Andrew J. Millis, Brenda Rubenstein, Qiang Han, and Hao Shi
    Author(s): Hongxia Hao, Antoine Georges, Andrew J. Millis, Brenda Rubenstein, Qiang Han, and Hao Shi

    Layered perovskite ruthenium oxides exhibit a striking series of metal-insulator and magnetic-nonmagnetic phase transitions easily tuned by temperature, pressure, epitaxy, and nonlinear drive. In this work, we combine results from two complementary state-of-the-art many-body methods, auxiliary field...


    [Phys. Rev. B 101, 235110] Published Tue Jun 02, 2020
    2 Jun 2020 at 12:00pm
    Magnetotransport properties of tellurium under extreme conditions
    by Kazuto Akiba, Kaya Kobayashi, Tatsuo C. Kobayashi, Ryo Koezuka, Atsushi Miyake, Jun Gouchi, Yoshiya Uwatoko, and Masashi Tokunaga
    Author(s): Kazuto Akiba, Kaya Kobayashi, Tatsuo C. Kobayashi, Ryo Koezuka, Atsushi Miyake, Jun Gouchi, Yoshiya Uwatoko, and Masashi Tokunaga

    This study investigates the transport properties of a chiral elemental semiconductor tellurium (Te) under magnetic fields and pressure. Application of hydrostatic pressure reduces the resistivity of Te, while its temperature dependence remains semiconducting up to 4 GPa, contrary to recent theoretic...


    [Phys. Rev. B 101, 245111] Published Tue Jun 02, 2020
    2 Jun 2020 at 12:00pm
    High-pressure synthesis of heavily hole-doped cuprates ${\mathrm{Mg}}_{1−x}{\mathrm{Li}}_{x}{\mathrm{Cu}}_{2}{\mathrm{O}}_{3}$ with quasi-one-dimensional structure
    by Yoshinori Imai, Koya Sasaki, Takuya Aoyama, Kenji Shirasaki, Tomoo Yamamura, and Kenya Ohgushi
    Author(s): Yoshinori Imai, Koya Sasaki, Takuya Aoyama, Kenji Shirasaki, Tomoo Yamamura, and Kenya Ohgushi

    We investigate electronic properties of hole-doped cuprates ${\mathrm{Mg}}_{1−x}{\mathrm{Li}}_{x}{\mathrm{Cu}}_{2}{\mathrm{O}}_{3}$ with the quasi-one-dimensional two-leg-ladder structure. We succeeded in extending the solubility limit of Li in ${\mathrm{Mg}}_{1−x}{\mathrm{Li}}_{x}{\mathrm{Cu}}_{2}{...


    [Phys. Rev. B 101, 245112] Published Tue Jun 02, 2020
    2 Jun 2020 at 12:00pm
    Pressure effect on the electromotive force of the type R thermocouple
    by Yu Nishihara
    Volume 40, Issue 2, June 2020, Page 205-218
    .

    23 Dec 2019 at 12:29pm
    Phase relations in the Fe-P system at high pressures and temperatures from ab initio computations
    by Nursultan E. Sagatov
    Volume 40, Issue 2, June 2020, Page 235-244
    .

    17 Mar 2020 at 5:28am
    TiB2-reinforced B4C composites produced by reaction sintering at high-pressure and high temperature
    by Xiaonan Wang
    Volume 40, Issue 2, June 2020, Page 245-256
    .

    9 Apr 2020 at 8:54am
    TiC-MgO composite: an X-ray transparent and machinable heating element in a multi-anvil high pressure apparatus
    by Fang Xu
    Volume 40, Issue 2, June 2020, Page 257-266
    .

    6 Apr 2020 at 10:44am
    Ab initio investigation of pressure-induced structural transitions and electronic evolution of Th3N4
    by Yue Zhang
    Volume 40, Issue 2, June 2020, Page 267-282
    .

    13 May 2020 at 11:43am
    Changes of microflora in high pressure treated Indian white prawn (Fenneropenaeus indicus)
    by J. Ginson
    Volume 40, Issue 2, June 2020, Page 283-297
    .

    7 Jan 2020 at 7:50am
    Tantalum doping in HfO2: orthorhombic phase formation at ambient conditions and change in path of pressure-induced structural evolution
    by S. Pathak
    .

    20 May 2020 at 2:29pm