Synthesis and Stability of Lanthanum Superhydrides

Geballe, Zachary M.; Liu, Hanyu; Mishra, Ajay K.; Ahart, Muhtar; Somayazulu, Maddury; Meng, Yue; Baldini, Maria; Hemley, Russell J.

doi:10.1002/anie.201709970

Synthesis and Stability of Lanthanum Superhydrides

Journal Article · Fri Dec 15 00:00:00 EST 2017 · Angewandte Chemie (International Edition)

DOI:https://doi.org/10.1002/anie.201709970· OSTI ID:1416987

^[1]; Liu, Hanyu ^[1]; Mishra, Ajay K. ^[2]; Ahart, Muhtar ^[1]; Somayazulu, Maddury ^[1]; Meng, Yue ^[3]; Baldini, Maria ^[1]; Hemley, Russell J. ^[4]

Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA
Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA, Permanent address: HP&,SRPD Bhabha Atomic Research Center Mumbai-85 India
HPCAT Geophysical Laboratory Carnegie Institution of Washington Argonne IL 60439 USA
Institute of Materials Science and Department of Civil and Environmental Engineering The George Washington University Washington DC 20052 USA

Abstract

Recent theoretical calculations predict that megabar pressure stabilizes very hydrogen‐rich simple compounds having new clathrate‐like structures and remarkable electronic properties including room‐temperature superconductivity. X‐ray diffraction and optical studies demonstrate that superhydrides of lanthanum can be synthesized with La atoms in an fcc lattice at 170 GPa upon heating to about 1000 K. The results match the predicted cubic metallic phase of LaH ₁₀ having cages of thirty‐two hydrogen atoms surrounding each La atom. Upon decompression, the fcc‐based structure undergoes a rhombohedral distortion of the La sublattice. The superhydride phases consist of an atomic hydrogen sublattice with H−H distances of about 1.1 Å, which are close to predictions for solid atomic metallic hydrogen at these pressures. With stability below 200 GPa, the superhydride is thus the closest analogue to solid atomic metallic hydrogen yet to be synthesized and characterized.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-06CH11357; NA0001974; NA0002006; SC0001057

OSTI ID:: 1416987

Alternate ID(s):: OSTI ID: 1418052
OSTI ID: 22674397

Journal Information:: Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 3 Vol. 57; ISSN 1433-7851

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

References (32)

Strain/order parameter coupling in the ferroelastic transition in dense SiO2 Hemley, R. J.; Shu, J.; Carpenter, M. A. Solid State Communications, Vol. 114, Issue 10 https://doi.org/10.1016/S0038-1098(00)00099-5	journal	May 2000
X-ray diffraction and equation of state of hydrogen at megabar pressures Loubeyre, P.; LeToullec, R.; Hausermann, D. Nature, Vol. 383, Issue 6602 https://doi.org/10.1038/383702a0	journal	October 1996
Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system Drozdov, A. P.; Eremets, M. I.; Troyan, I. A. Nature, Vol. 525, Issue 7567 https://doi.org/10.1038/nature14964	journal	August 2015
Quantum hydrogen-bond symmetrization in the superconducting hydrogen sulfide system Errea, Ion; Calandra, Matteo; Pickard, Chris J. Nature, Vol. 532, Issue 7597 https://doi.org/10.1038/nature17175	journal	March 2016
Pressure-induced bonding and compound formation in xenon–hydrogen solids Somayazulu, Maddury; Dera, Przemyslaw; Goncharov, Alexander F. Nature Chemistry, Vol. 2, Issue 1 https://doi.org/10.1038/nchem.445	journal	November 2009
Synthesis of sodium polyhydrides at high pressures Struzhkin, Viktor V.; Kim, Duck Young; Stavrou, Elissaios Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms12267	journal	July 2016
Conductive dense hydrogen Eremets, M. I.; Troyan, I. A. Nature Materials, Vol. 10, Issue 12 https://doi.org/10.1038/nmat3175	journal	November 2011
Crystal structure of the superconducting phase of sulfur hydride Einaga, Mari; Sakata, Masafumi; Ishikawa, Takahiro Nature Physics, Vol. 12, Issue 9 https://doi.org/10.1038/nphys3760	journal	May 2016
Pressure-induced metallization of dense (H2S)2H2 with high-Tc superconductivity Duan, Defang; Liu, Yunxian; Tian, Fubo Scientific Reports, Vol. 4, Issue 1 https://doi.org/10.1038/srep06968	journal	November 2014
Pressure-stabilized superconductive yttrium hydrides Li, Yinwei; Hao, Jian; Liu, Hanyu Scientific Reports, Vol. 5, Issue 1 https://doi.org/10.1038/srep09948	journal	May 2015
Compressed sodalite-like MgH ₆ as a potential high-temperature superconductor Feng, Xiaolei; Zhang, Jurong; Gao, Guoying RSC Advances, Vol. 5, Issue 73 https://doi.org/10.1039/C5RA11459D	journal	January 2015
On the Possibility of a Metallic Modification of Hydrogen Wigner, E.; Huntington, H. B. The Journal of Chemical Physics, Vol. 3, Issue 12 https://doi.org/10.1063/1.1749590	journal	December 1935
A little bit of lithium does a lot for hydrogen Zurek, E.; Hoffmann, R.; Ashcroft, N. W. Proceedings of the National Academy of Sciences, Vol. 106, Issue 42 https://doi.org/10.1073/pnas.0908262106	journal	October 2009
Superconductive sodalite-like clathrate calcium hydride at high pressures Wang, H.; Tse, J. S.; Tanaka, K. Proceedings of the National Academy of Sciences, Vol. 109, Issue 17 https://doi.org/10.1073/pnas.1118168109	journal	April 2012
Potential high- T _c superconducting lanthanum and yttrium hydrides at high pressure Liu, Hanyu; Naumov, Ivan I.; Hoffmann, Roald Proceedings of the National Academy of Sciences, Vol. 114, Issue 27 https://doi.org/10.1073/pnas.1704505114	journal	June 2017
Stable high-pressure phases in the H-S system determined by chemically reacting hydrogen and sulfur Goncharov, Alexander F.; Lobanov, Sergey S.; Prakapenka, Vitali B. Physical Review B, Vol. 95, Issue 14 https://doi.org/10.1103/PhysRevB.95.140101	journal	April 2017
Pressure-Induced Hydrogen-Dominant Metallic State in Aluminum Hydride Goncharenko, Igor; Eremets, M. I.; Hanfland, M. Physical Review Letters, Vol. 100, Issue 4 https://doi.org/10.1103/PhysRevLett.100.045504	journal	January 2008
Synchrotron Infrared Measurements of Dense Hydrogen to 360 GPa Zha, Chang-Sheng; Liu, Zhenxian; Hemley, Russell J. Physical Review Letters, Vol. 108, Issue 14 https://doi.org/10.1103/PhysRevLett.108.146402	journal	April 2012
High-Pressure Synthesis and Characterization of Iridium Trihydride Scheler, Thomas; Marqués, Miriam; Konôpková, Zuzana Physical Review Letters, Vol. 111, Issue 21 https://doi.org/10.1103/PhysRevLett.111.215503	journal	November 2013
New Iron Hydrides under High Pressure Pépin, Charles M.; Dewaele, Agnès; Geneste, Grégory Physical Review Letters, Vol. 113, Issue 26 https://doi.org/10.1103/PhysRevLett.113.265504	journal	December 2014
Hydrogen Clathrate Structures in Rare Earth Hydrides at High Pressures: Possible Route to Room-Temperature Superconductivity Peng, Feng; Sun, Ying; Pickard, Chris J. Physical Review Letters, Vol. 119, Issue 10 https://doi.org/10.1103/PhysRevLett.119.107001	journal	September 2017
Metallic Hydrogen: A High-Temperature Superconductor? Ashcroft, N. W. Physical Review Letters, Vol. 21, Issue 26 https://doi.org/10.1103/PhysRevLett.21.1748	journal	December 1968
Approaches for Reducing the Insulator-Metal Transition Pressure in Hydrogen Carlsson, A. E.; Ashcroft, N. W. Physical Review Letters, Vol. 50, Issue 17 https://doi.org/10.1103/PhysRevLett.50.1305	journal	April 1983
Novel reentrant high pressure phase transtion in lanthanum Porsch, F.; Holzapfel, W. B. Physical Review Letters, Vol. 70, Issue 26 https://doi.org/10.1103/PhysRevLett.70.4087	journal	June 1993
Hydrogen Dominant Metallic Alloys: High Temperature Superconductors? Ashcroft, N. W. Physical Review Letters, Vol. 92, Issue 18 https://doi.org/10.1103/PhysRevLett.92.187002	journal	May 2004
Ultrahigh-pressure transitions in solid hydrogen Mao, Ho-kwang; Hemley, Russell J. Reviews of Modern Physics, Vol. 66, Issue 2 https://doi.org/10.1103/RevModPhys.66.671	journal	April 1994
The properties of hydrogen and helium under extreme conditions McMahon, Jeffrey M.; Morales, Miguel A.; Pierleoni, Carlo Reviews of Modern Physics, Vol. 84, Issue 4 https://doi.org/10.1103/RevModPhys.84.1607	journal	November 2012
EosFit7-GUI : a new graphical user interface for equation of state calculations, analyses and teaching Gonzalez-Platas, Javier; Alvaro, Matteo; Nestola, Fabrizio Journal of Applied Crystallography, Vol. 49, Issue 4 https://doi.org/10.1107/S1600576716008050	journal	June 2016
Observation of the Wigner-Huntington transition to metallic hydrogen Dias, Ranga P.; Silvera, Isaac F. Science, Vol. 355, Issue 6326 https://doi.org/10.1126/science.aal1579	journal	January 2017
Comment on “Observation of the Wigner-Huntington transition to metallic hydrogen” Goncharov, Alexander F.; Struzhkin, Viktor V. Science, Vol. 357, Issue 6353 https://doi.org/10.1126/science.aam9736	journal	August 2017
Synthesis of FeH ₅ : A layered structure with atomic hydrogen slabs Pépin, C. M.; Geneste, G.; Dewaele, A. Science, Vol. 357, Issue 6349 https://doi.org/10.1126/science.aan0961	journal	July 2017
Comment on “Observation of the Wigner-Huntington transition to metallic hydrogen” Liu, Xiao-Di; Dalladay-Simpson, Philip; Howie, Ross T. Science, Vol. 357, Issue 6353 https://doi.org/10.1126/science.aan2286	journal	August 2017

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