Title: Diverse high-pressure chemistry in Y-NH3BH3 and Y–paraffin oil systems

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [5];  [6]; ORCiD logo [6];  [7]; ORCiD logo [7]; ORCiD logo [7]; ORCiD logo [7]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [8]; ORCiD logo [9]; ORCiD logo [1]
  1. University of Bayreuth, Bayreuth (Germany). Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI)
  2. University of Bayreuth, Bayreuth (Germany). Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI); University of Bayreuth, Bayreuth (Germany). Laboratory of Crystallography
  3. Univ. of Edinburgh, Scotland (United Kingdom)
  4. University of Bayreuth, Bayreuth (Germany). Laboratory of Crystallography; Shandong University, Jinan (China); Linköping University (Sweden)
  5. Univ. of Cologne (Germany)
  6. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  7. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  8. Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS)
  9. University of Bayreuth, Bayreuth (Germany). Laboratory of Crystallography; Linköping University (Sweden)

The yttrium-hydrogen system has gained attention because of near-ambient temperature superconductivity reports in yttrium hydrides at high pressures. We conducted a study using synchrotron single-crystal x-ray diffraction (SCXRD) at 87 to 171 GPa, resulting in the discovery of known (two YH3 phases) and five previously unknown yttrium hydrides. These were synthesized in diamond anvil cells by laser heating yttrium with hydrogen-rich precursors—ammonia borane or paraffin oil. The arrangements of yttrium atoms in the crystal structures of new phases were determined on the basis of SCXRD, and the hydrogen content estimations based on empirical relations and ab initio calculations revealed the following compounds: Y3H11, Y2H9, Y4H23, Y13H75, and Y4H25. The study also uncovered a carbide (YC2) and two yttrium allotropes. Complex phase diversity, variable hydrogen content in yttrium hydrides, and their metallic nature, as revealed by ab initio calculations, underline the challenges in identifying superconducting phases and understanding electronic transitions in high-pressure synthesized materials.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
German Research Foundation (DFG); National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2470097
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 11 Vol. 10; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

References (58)

Anomalous High‐Temperature Superconductivity in YH 6 journal March 2021
The H−Y (Hydrogen-Yttrium) system journal June 1988
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Existence of yttrium allotrope with incommensurate host–guest structure at moderate pressure: First evidence from computational approach journal October 2022
Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties journal November 2019
Absence of magnetic evidence for superconductivity in hydrides under high pressure journal May 2021
First principles phonon calculations in materials science journal November 2015
X-ray diffraction investigation of the hexagonal–fcc structural transition in yttrium trihydride under hydrostatic pressure journal June 2006
Novel Strongly Correlated Europium Superhydrides journal December 2020
Superconductivity at 39 K in magnesium diboride journal March 2001
Superconductivity above 130 K in the Hg–Ba–Ca–Cu–O system journal May 1993
Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system journal August 2015
Synthesis of clathrate cerium superhydride CeH9 at 80-100 GPa with atomic hydrogen sublattice journal October 2019
Synthesis of molecular metallic barium superhydride: pseudocubic BaH12 journal January 2021
Superconductivity up to 243 K in the yttrium-hydrogen system under high pressure journal August 2021
High-pressure synthesis of seven lanthanum hydrides with a significant variability of hydrogen content journal November 2022
Superconductivity at 250 K in lanthanum hydride under high pressures journal May 2019
Unusual width of the superconducting transition in a hydride journal August 2021
Evidence of near-ambient superconductivity in a N-doped lutetium hydride journal March 2023
Pressure-stabilized superconductive yttrium hydrides journal May 2015
Synthesis, crystal structure and physical properties of the clathrate-I phase Ba8RhxSi46−x−y□y journal January 2012
Rhenium, an in situ pressure calibrant for internally heated diamond anvil cells journal July 2004
Pressure calibration of diamond anvil Raman gauge to 310GPa journal August 2006
New diamond cell for single-crystal x-ray diffraction journal November 2006
BX90: A new diamond anvil cell design for X-ray diffraction and optical measurements journal December 2012
Equation of state of rhenium and application for ultra high pressure calibration journal January 2014
Laser heating setup for diamond anvil cells for in situ synchrotron and in house high and ultra-high pressure studies journal October 2019
In situ high-pressure nuclear magnetic resonance crystallography in one and two dimensions journal October 2021
Clear evidence against superconductivity in hydrides under high pressure journal July 2022
Potential high- T c superconducting lanthanum and yttrium hydrides at high pressure journal June 2017
High-pressure structures of yttrium hydrides journal July 2017
High-temperature superconductivity in sulfur hydride evidenced by alternating-current magnetic susceptibility journal May 2019
Structural and electronic properties of the incommensurate host-guest Bi-III phase journal July 2019
Structural phase transitions in yttrium up to 183 GPa journal September 2020
Proton mobility in metallic copper hydride from high-pressure nuclear magnetic resonance journal October 2020
Nonstandard superconductivity or no superconductivity in hydrides under high pressure journal April 2021
High-pressure hP3 yttrium allotrope with CaHg2 -type structure as a prototype of the hP3 rare-earth hydride series journal January 2023
Special points for Brillouin-zone integrations journal June 1976
Improved tetrahedron method for Brillouin-zone integrations journal June 1994
Projector augmented-wave method journal December 1994
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Long-period stacking structures in yttrium trihydride at high pressure journal August 2007
Evidence for Superconductivity above 260 K in Lanthanum Superhydride at Megabar Pressures journal January 2019
Synthesis of Yttrium Superhydride Superconductor with a Transition Temperature up to 262 K by Catalytic Hydrogenation at High Pressures journal March 2021
Novel High-Pressure Yttrium Carbide γ−Y4C5 Containing [ C2 ] and Nonlinear [ C3 ] Units with Unusually Large Formal Charges journal September 2021
High-Temperature Superconducting Phase in Clathrate Calcium Hydride CaH6 up to 215 K at a Pressure of 172 GPa journal April 2022
Generalized Gradient Approximation Made Simple journal October 1996
Experimental clathrate superhydrides EuH6 and EuH9 at extreme pressure conditions journal November 2021
OLEX2 : a complete structure solution, refinement and analysis program journal January 2009
VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data journal October 2011
Combined method for ab initio structure solution from powder diffraction data journal October 1999
EosFit7-GUI : a new graphical user interface for equation of state calculations, analyses and teaching journal June 2016
Domain Auto Finder (DAFi) program: the analysis of single-crystal X-ray diffraction data from polycrystalline samples journal September 2022
Crystal structure refinement with SHELXL journal January 2015
SHELXT – Integrated space-group and crystal-structure determination journal January 2015
Uranium polyhydrides at moderate pressures: Prediction, synthesis, and expected superconductivity journal October 2018
Superconducting praseodymium superhydrides journal February 2020
Future Study of Dense Superconducting Hydrides at High Pressure journal December 2021