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.

Clonal driver neoantigen loss under EGFR TKI and immune selection pressures
by Maise Al Bakir


Nature, Published online: 19 February 2025; doi:10.1038/s41586-025-08586-y

We show the evolution of a case of EGFR mutant lung cancer treated with a combination of erlotinib, osimertinib, radiotherapy and a personalized neopeptide vaccine targeting somatic mutations, including EGFR exon 19 deletion.
19 Feb 2025 at 12:00am
Magnetic order sets the stage
by Michael Smidman


Nature Physics, Published online: 17 February 2025; doi:10.1038/s41567-024-02772-x

High-temperature superconductivity has been found in a nickelate material under pressure, but the underlying state is unclear. Muons now show that the material hosts distinct phases that evolve differently with increasing pressure.
17 Feb 2025 at 12:00am
Pressure-enhanced splitting of density wave transitions in La3Ni2O7–δ
by Rustem Khasanov


Nature Physics, Published online: 17 February 2025; doi:10.1038/s41567-024-02754-z

The density wave transition in a superconducting nickelate is shown to split when hydrostatic pressure is applied, indicating that it is composed of both a spin density wave and another form of ordered state.
17 Feb 2025 at 12:00am

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Theory of Pressure Dependence of Superconductivity in Bilayer Nickelate ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$
by Kai-Yue Jiang, Yu-Han Cao, Qing-Geng Yang, Hong-Yan Lu, and Qiang-Hua Wang
Author(s): Kai-Yue Jiang, Yu-Han Cao, Qing-Geng Yang, Hong-Yan Lu, and Qiang-Hua Wang


A recent experiment showed the superconducting transition temperature in the Ruddlesden-Popper bilayer ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ decreases monotonically with increasing pressure above 14 GPa. In order to unravel the underlying mechanism for this unusual dependence, we perf…


[Phys. Rev. Lett. 134, 076001] Published Tue Feb 18, 2025
18 Feb 2025 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
Pressure-induced topological changes in the Fermi surface of a two-dimensional molecular conductor
by T. Kobayashi, K. Yoshimi, H. Ma, S. Sekine, H. Taniguchi, N. Matsunaga, A. Kawamoto, and Y. Uwatoko
Author(s): T. Kobayashi, K. Yoshimi, H. Ma, S. Sekine, H. Taniguchi, N. Matsunaga, A. Kawamoto, and Y. Uwatoko


We demonstrated x-ray structural analysis of the pressure-induced superconductor ${β}^{′}\text{−}{\mathrm{ET}}_{2}{\mathrm{ICl}}_{2}$ under extremely high pressure conditions, where ET denotes bis(ethylenedithio)tetrathiafulvalene. This material has been known as the highest transition temperature (…


[Phys. Rev. Materials 9, L021801] Published Fri Feb 07, 2025
7 Feb 2025 at 11:00am
Pressure driven iso-structural phase transition and its implication on the Néel skyrmion host hexagonal PtMnGa
by K. K. Dubey, S. Rastogi, Ajit K. Jena, Gaurav K. Shukla, Parul Devi, Seung-Cheol Lee, Satadeep Bhattacharjee, R. Rawat, Boby Joseph, and Sanjay Singh
Author(s): K. K. Dubey, S. Rastogi, Ajit K. Jena, Gaurav K. Shukla, Parul Devi, Seung-Cheol Lee, Satadeep Bhattacharjee, R. Rawat, Boby Joseph, and Sanjay Singh


Magnetic skyrmions are nanometer-sized whirling spin textures in the magnetic material, which have the potential to revolutionize the field of spintronics. This study explores the influence of pressure on the structural properties of the PtMnGa hexagonal system, recognized for hosting Néel skyrmions…


[Phys. Rev. Materials 8, 125404] Published Fri Dec 27, 2024
27 Dec 2024 at 11:00am
Growth and characterization of the ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7−δ}$ thin films: Dominant contribution of the ${d}_{{x}^{2}−{y}^{2}}$ orbital at ambient pressure
by Yuecong Liu, Mengjun Ou, Haifeng Chu, Huan Yang, Qing Li, Ying-Jie Zhang, and Hai-Hu Wen
Author(s): Yuecong Liu, Mengjun Ou, Haifeng Chu, Huan Yang, Qing Li, Ying-Jie Zhang, and Hai-Hu Wen


Using the pulsed-laser-ablation technique, we successfully grew ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7−δ}$ thin films with $c$-axis orientation perpendicular to the film surface. X-ray diffraction showed that the (00l) peaks can be well-indexed to the ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{…


[Phys. Rev. Materials 8, 124801] Published Mon Dec 16, 2024
16 Dec 2024 at 11:00am
Breakdown of electron lone pair and insulator-to-metal transition in $\mathrm{Ti}{\mathrm{S}}_{3}$ under high pressure
by A. R. Atique Ulla, P. Modak, and Ashok K. Verma
Author(s): A. R. Atique Ulla, P. Modak, and Ashok K. Verma


Solid titanium trisulfide ($\mathrm{Ti}{\mathrm{S}}_{3}$), a layered semiconducting material, has attracted considerable attention in recent times because of its robust anisotropic optical and electronic properties, which opened tremendous application possibilities. In a recent experiment, it was ob…


[Phys. Rev. Materials 8, 124601] Published Fri Dec 13, 2024
13 Dec 2024 at 11:00am
Structural transformations of dysprosium up to 337 GPa
by Hongkai Li, Mingyu Li, Zhongyan Wu, Bing Li, Hechong Wang, Shaojie Wang, Jing Song, Ke Yang, Saori Imada Kawaguchi, Guoying Gao, Lin Wang, and Yongjun Tian
Author(s): Hongkai Li, Mingyu Li, Zhongyan Wu, Bing Li, Hechong Wang, Shaojie Wang, Jing Song, Ke Yang, Saori Imada Kawaguchi, Guoying Gao, Lin Wang, and Yongjun Tian


The structures and equations of states of dysprosium have been studied up to 337 GPa without a pressure transmitting medium using synchrotron x-ray diffraction. Beyond the previously reported transition sequences, namely hP2 → hR9 → hP4 → hR24 → oF16, we herein disclose an isosymmetric structural tr…


[Phys. Rev. B 111, 064112] Published Thu Feb 20, 2025
20 Feb 2025 at 11:00am
Electronic structure of the honeycomb iridate ${\mathrm{Cu}}_{2}{\mathrm{IrO}}_{3}$ at high pressure
by G. Fabbris, E. H. T. Poldi, S. Sinha, J. Lim, T. Elmslie, J. H. Kim, A. Said, M. Upton, M. Abramchuk, F. Bahrami, C. Kenney-Benson, C. Park, G. Shen, Y. K. Vohra, R. J. Hemley, J. J. Hamlin, F. Tafti, and D. Haskel
Author(s): G. Fabbris, E. H. T. Poldi, S. Sinha, J. Lim, T. Elmslie, J. H. Kim, A. Said, M. Upton, M. Abramchuk, F. Bahrami, C. Kenney-Benson, C. Park, G. Shen, Y. K. Vohra, R. J. Hemley, J. J. Hamlin, F. Tafti, and D. Haskel


This work investigates the high-pressure electronic phase diagram of honeycomb iridate Cu2IrO3, a candidate material to host the Kitaev quantum spin liquid state. The authors find a complex set of electronic phases, including an electron transfer from Cu to Ir that only occurs upon cold compression, highlighting the proximity between multiple electronic states. The results also underscore the importance of the thermodynamic pathway in accessing novel states in honeycomb iridates.


[Phys. Rev. B 111, 075153] Published Thu Feb 20, 2025
20 Feb 2025 at 11:00am
Unveiling the multiband metallic nature of the normal state in the nickelate ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$
by Bowen Chen, Hengyuan Zhang, Jingyuan Li, Deyuan Hu, Mengwu Huo, Shuyang Wang, Chuanying Xi, Zhaosheng Wang, Hualei Sun, Meng Wang, and Bing Shen
Author(s): Bowen Chen, Hengyuan Zhang, Jingyuan Li, Deyuan Hu, Mengwu Huo, Shuyang Wang, Chuanying Xi, Zhaosheng Wang, Hualei Sun, Meng Wang, and Bing Shen


The discovery of unconventional superconductivity around 80 K in perovskite nickelates under high pressure has furnished a new platform to explore high-temperature unconventional superconductivity in addition to cuprates. Understanding the normal state of nickelate superconductors is crucial to unco…


[Phys. Rev. B 111, 054519] Published Wed Feb 19, 2025
19 Feb 2025 at 11:00am
Robust spin-orbit coupling in semimetallic ${\mathrm{SrIrO}}_{3}$ under hydrostatic pressure
by D. Fuchs, A. K. Jaiswal, F. Wilhelm, D. Wang, A. Rogalev, and M. Le Tacon
Author(s): D. Fuchs, A. K. Jaiswal, F. Wilhelm, D. Wang, A. Rogalev, and M. Le Tacon


The semimetallic behavior of the perovskite iridate ${\mathrm{SrIrO}}_{3}$ shifts the end member of the strongly spin-orbit (SO) coupled Ruddlesden-Popper series ${\mathrm{Sr}}_{n+1}{\mathrm{Ir}}_{n}{\mathrm{O}}_{3n+1}$ away from the Mott insulating regime and the half-filled pseudospin ${J}_{\mathr…


[Phys. Rev. B 111, 075142] Published Wed Feb 19, 2025
19 Feb 2025 at 11:00am
Lithium's low-temperature phase transitions: Insights into quantum lattice dynamics and superconductivity
by Stefano Racioppi, Iren Saffarian-Deemyad, William Holle, Francesco Belli, Jesse S. Smith, Curtis Kenney-Benson, Richard Ferry, Eva Zurek, and Shanti Deemyad
Author(s): Stefano Racioppi, Iren Saffarian-Deemyad, William Holle, Francesco Belli, Jesse S. Smith, Curtis Kenney-Benson, Richard Ferry, Eva Zurek, and Shanti Deemyad


The large lattice dynamics of lithium, driven by its low atomic mass, results in energetically similar structures and significant isotope effects under pressure, posing challenges to current theoretical models. Above 20 GPa and at low temperatures, lithium's electronic properties deviate from simple…


[Phys. Rev. B 111, 054111] Published Tue Feb 18, 2025
18 Feb 2025 at 11:00am
Predictions of high-temperature superconducting ternary hydrides under high pressure using density functional calculations
by Bangshuai Zhu, Dexi Shao, Cuiying Pei, Qi Wang, Juefei Wu, and Yanpeng Qi
Author(s): Bangshuai Zhu, Dexi Shao, Cuiying Pei, Qi Wang, Juefei Wu, and Yanpeng Qi


The abundant chemical compositions in ternary hydrides bring much more possibility to explore high-temperature superconductors under lower pressure. Here we constructed 115 ternary hydrides on the basis of the element substitution using 16 metal elements within five reported prototype structures. We…


[Phys. Rev. B 111, 054517] Published Tue Feb 18, 2025
18 Feb 2025 at 11:00am
Superconducting transition and topological behavior in $π$-SnS under high pressure
by Xindeng Lv, Feng Liu, Min Wu, Qian Li, Yanping Huang, Fei Chen, and Tian Cui
Author(s): Xindeng Lv, Feng Liu, Min Wu, Qian Li, Yanping Huang, Fei Chen, and Tian Cui


The interplay between superconductivity and topological properties has garnered significant research interest due to its potential implications for novel quantum materials. Here, we systematically investigate the structural, topological, and electronic transport properties of π-SnS nanocrystals unde…


[Phys. Rev. B 111, 054518] Published Tue Feb 18, 2025
18 Feb 2025 at 11:00am
Anomalous elastic softening in ferroelectric hafnia under pressure
by Alejandro Alvarez, Niaz Abdolrahim, and Sobhit Singh
Author(s): Alejandro Alvarez, Niaz Abdolrahim, and Sobhit Singh


This study employs first-principles density-functional theory (DFT) calculations to explore the elastic and mechanical properties of ferroelectric hafnia $({\mathrm{HfO}}_{2})$ in its polar orthorhombic $Pca{2}_{1}$ phase under varying hydrostatic pressure conditions up to 30 GPa. Utilizing a plane-…


[Phys. Rev. B 111, 064106] Published Tue Feb 18, 2025
18 Feb 2025 at 11:00am
Uniaxial pressure effects, phase diagram, and tricritical point in the centrosymmetric skyrmion lattice magnet ${\mathrm{GdRu}}_{2}{\mathrm{Si}}_{2}$
by L. Gries, T. Kleinbeck, D. A. Mayoh, G. D. A. Wood, G. Balakrishnan, and R. Klingeler
Author(s): L. Gries, T. Kleinbeck, D. A. Mayoh, G. D. A. Wood, G. Balakrishnan, and R. Klingeler


The magnetic phase diagram, magnetoelastic coupling, and uniaxial pressure effects of centrosymmetric magnetic skyrmion-hosting ${\mathrm{GdRu}}_{2}{\mathrm{Si}}_{2}$ are investigated by means of high-resolution capacitance dilatometry in fields up to 15 T supported by specific-heat and magnetizatio…


[Phys. Rev. B 111, 064419] Published Tue Feb 18, 2025
18 Feb 2025 at 11:00am
Theoretical study of the crystal structure of the bilayer nickel oxychloride ${\mathrm{Sr}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{5}{\mathrm{Cl}}_{2}$ and analysis of possible unconventional superconductivity
by Masayuki Ochi, Hirofumi Sakakibara, Hidetomo Usui, and Kazuhiko Kuroki
Author(s): Masayuki Ochi, Hirofumi Sakakibara, Hidetomo Usui, and Kazuhiko Kuroki


The discovery of superconductivity under high pressure with ${T}_{c}$ exceeding 80 K in a bilayer nickelate ${\mathrm{La}}_{3}{\mathrm{Ni}}_{2}{\mathrm{O}}_{7}$ has led to a strong desire to realize similar high ${T}_{c}$ phenomena at ambient pressure. As one possible path toward realizing supercond…


[Phys. Rev. B 111, 064511] Published Tue Feb 18, 2025
18 Feb 2025 at 11:00am
Origin of the density wave instability in trilayer nickelate $\mathrm{L}{\mathrm{a}}_{4}\mathrm{N}{\mathrm{i}}_{3}{\mathrm{O}}_{10}$ revealed by optical and ultrafast spectroscopy
by Shuxiang Xu, Cui-Qun Chen, Mengwu Huo, Deyuan Hu, Hao Wang, Qiong Wu, Rongsheng Li, Dong Wu, Meng Wang, Dao-Xin Yao, Tao Dong, and Nanlin Wang
Author(s): Shuxiang Xu, Cui-Qun Chen, Mengwu Huo, Deyuan Hu, Hao Wang, Qiong Wu, Rongsheng Li, Dong Wu, Meng Wang, Dao-Xin Yao, Tao Dong, and Nanlin Wang


The authors observe here a distinct formation of a density wave energy gap in La4Ni3O10 using optical conductivity and pump-probe measurements. By comparing the experimentally determined plasma frequency with first-principles calculations, La4Ni3O10 is classified as a moderately electron-correlated material, exhibiting weaker electronic correlation than the bilayer nickelate La3Ni2O7. The enhanced gap feature and weaker electronic correlation in La4Ni3O10 provide insight into its lower superconductivity transition temperature under high pressure.


[Phys. Rev. B 111, 075140] Published Tue Feb 18, 2025
18 Feb 2025 at 11:00am
In situ electrical conductivity measurement of saturated rocks at shallow crustal temperatures and pressures in an autoclave
by Chaoyi Xiao Shuangming Shan Heping Li Sen Lin Shengbin Li a Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, People’s Republic of Chinab University of Chinese Academy of Sciences, Beijing, People’s Republic of China
Volume 45, Issue 1, March 2025, Page 57-66
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24 Dec 2024 at 7:38am
Temperature gradients in high pressure multi-anvil cell
by Takuya Moriguti Akira Yoneda Eiji Ito a Institute for Planetary Materials, Okayama University, Misasa, Tottori, Japanb Department of Earth and Space Science, Osaka University, Toyonaka, Osaka, Japan
Volume 45, Issue 1, March 2025, Page 1-16
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19 Dec 2024 at 1:29pm
Pressure-sensitive germanate glass-Li2GeO3, a multifunctional energy material: a theoretical study
by R. Zosiamliana L. Celestine Lalhriat Zuala B. Chettri Zodin Mawia G. Abdurakhmanov A. Laref Shalika R. Bhandari D. P. Rai a Physical Sciences Research Center (PSRC), Department of Physics, Pachhunga University College, Mizoram University, Aizawl, Indiab Department of Physics, Mizoram University, Aizawl, Indiac Department of Physics, North-Eastern Hill University, Shillong, Indiad National University of Uzbekistan, Tashkent, Uzbekistane Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Saudi Arabiaf Department of Physics, Bhairahawa Multiple Campus, Tribhuvan University, Rupandehi, Nepal
Volume 45, Issue 1, March 2025, Page 29-56
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25 Dec 2024 at 7:29am
High pressure behavior of incommensurately modulated nyerereite structure
by N. Bogdanov S. Rashchenko P. Gavryushkin V. Thomas D. Fursenko Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia
Volume 45, Issue 1, March 2025, Page 67-78
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27 Dec 2024 at 8:15am
Crystalline state in a pressure region of proceeding amorphization of SnI4
by Kazuhiro Fuchizaki Hiroki Naruta Fumiya Sato Tomohiro Ohuchi Akio Suzuki a Department of Physics, Ehime University, Matsuyama, Japanb Graduate School of Science and Engineering, Ehime University, Matsuyama, Japanc Geodynamics Research Center, Ehime University, Matsuyama, Japand Department of Earth Science, Tohoku University, Sendai, Japan
Volume 45, Issue 1, March 2025, Page 90-107
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13 Jan 2025 at 12:09pm
High pressure Raman spectroscopy of boron-rich boron carbides up to 50 GPa
by Raimundas Sereika Seth Iwan Paul A. Baker Yogesh K. Vohra Department of Physics, University of Alabama at Birmingham, Birmingham, AL, USA
Volume 45, Issue 1, March 2025, Page 79-89
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6 Jan 2025 at 8:55am
The magnetism and elasticity of ϵ-FeOOH across the pressure-induced electronic spin transition
by Osamu Ikeda Tatsuya Sakamaki Takaya Mitsui Kosuke Fujiwara Hiroshi Uchiyama Hiroshi Fukui Daisuke Ishikawa Alfred Q.R. Baron Akio Suzuki a Department of Earth Science, Graduate School of Science, Tohoku University, Sendai, Japanb Kansai Institute for Photon Science, National Institute for Quantum Science and Technology, Sayo, Japanc Japan Synchrotron Radiation Research Institute, Sayo, Japand Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Japan
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19 Feb 2025 at 7:57am