Fundamental understanding of electronic transitions in platinum group metals and alloys from high-pressure experiment and ab initio theory

• Applicant: Professorin Dr. Natalia Dubrovinskaia
• Subject Area: Experimental Condensed Matter Physics
• Term: from 2017 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 338621729

• Final Report Year: 2024

Final Report Abstract

The behavior of matter at extreme conditions is fascinating. Compression gives rise to a qualitative modification of properties of materials, such as structural and magnetic phase transitions, transformation from ferromagnetism to superconductivity, forming new “super”- states of matter, and other phenomena. The ultimate goal of the project was to study the phase relations, structures, and thermoelastic properties of platinum group metals (PGMs) and their alloys at multimegabar pressure, 200 GPa and above, and variable temperatures by means of in situ powder and single crystal X-ray diffraction in externally and laser heated DACs (and dsDACs) combined with advanced theoretical simulations. We intended to establish regularities in the high-pressure behavior of PGMs and their alloys.

Publications

• Breakdown of Magnetic Order in the Pressurized Kitaev Iridate β-Li₂IrO₃. Physical Review Letters, 120(23).
  Majumder, M.; Manna, R. S.; Simutis, G.; Orain, J. C.; Dey, T.; Freund, F.; Jesche, A.; Khasanov, R.; Biswas, P. K.; Bykova, E.; Dubrovinskaia, N.; Dubrovinsky, L. S.; Yadav, R.; Hozoi, L.; Nishimoto, S.; Tsirlin, A. A. & Gegenwart, P.
  
• High‐Pressure Synthesis of a Nitrogen‐Rich Inclusion Compound ReN8⋅x N2 with Conjugated Polymeric Nitrogen Chains. Angewandte Chemie International Edition, 57(29), 9048-9053.
  Bykov, Maxim; Bykova, Elena; Koemets, Egor; Fedotenko, Timofey; Aprilis, Georgios; Glazyrin, Konstantin; Liermann, Hanns‐Peter; Ponomareva, Alena V.; Tidholm, Johan; Tasnádi, Ferenc; Abrikosov, Igor A.; Dubrovinskaia, Natalia & Dubrovinsky, Leonid
  
• Equations of state of rhodium, iridium and their alloys up to 70 GPa. Journal of Alloys and Compounds, 788, 212-218.
  Yusenko, Kirill V.; Khandarkhaeva, Saiana; Fedotenko, Timofey; Pakhomova, Anna; Gromilov, Sergey A.; Dubrovinsky, Leonid & Dubrovinskaia, Natalia
  
• High-pressure synthesis of ultraincompressible hard rhenium nitride pernitride Re2(N2)(N)2 stable at ambient conditions. Nature Communications, 10(1).
  Bykov, Maxim; Chariton, Stella; Fei, Hongzhan; Fedotenko, Timofey; Aprilis, Georgios; Ponomareva, Alena V.; Tasnádi, Ferenc; Abrikosov, Igor A.; Merle, Benoit; Feldner, Patrick; Vogel, Sebastian; Schnick, Wolfgang; Prakapenka, Vitali B.; Greenberg, Eran; Hanfland, Michael; Pakhomova, Anna; Liermann, Hanns-Peter; Katsura, Tomoo; Dubrovinskaia, Natalia & Dubrovinsky, Leonid
  
• Synthesis of Arsenopyrite‐Type Rhodium Pernitride RhN2 from a Single‐Source Azide Precursor. European Journal of Inorganic Chemistry, 2019(32), 3667-3671.
  Bykov, Maxim; Yusenko, Kirill V.; Bykova, Elena; Pakhomova, Anna; Kraus, Werner; Dubrovinskaia, Natalia & Dubrovinsky, Leonid
  
• Novel Rhenium Carbides at 200 GPa. European Journal of Inorganic Chemistry, 2020(22), 2186-2190.
  Khandarkhaeva, Saiana; Fedotenko, Timofey; Bykov, Maxim; Bykova, Elena; Chariton, Stella; Sedmak, Pavel; Glazyrin, Konstantin; Prakapenka, Vitali; Dubrovinskaia, Natalia & Dubrovinsky, Leonid
  
• Synthesis of palladium carbides and palladium hydride in laser heated diamond anvil cells. Journal of Alloys and Compounds, 844, 156179.
  Fedotenko, T.; Dubrovinsky, L.; Khandarkhaeva, S.; Chariton, S.; Koemets, E.; Koemets, I.; Hanfland, M. & Dubrovinskaia, N.
  
• Materials synthesis at terapascal static pressures. Nature, 605(7909), 274-278.
  Dubrovinsky, Leonid; Khandarkhaeva, Saiana; Fedotenko, Timofey; Laniel, Dominique; Bykov, Maxim; Giacobbe, Carlotta; Lawrence, Bright Eleanor; Sedmak, Pavel; Chariton, Stella; Prakapenka, Vitali; Ponomareva, Alena V.; Smirnova, Ekaterina A.; Belov, Maxim P.; Tasnádi, Ferenc; Shulumba, Nina; Trybel, Florian; Abrikosov, Igor A. & Dubrovinskaia, Natalia