American Chemical Society (ACS)
Journal of Physical Chemistry Letters
,  volume 14 ,  issue 50 ,  pages 11490-11496

Pressure-Induced Metallization of BaH2 and the Effect of Hydrogenation

Hannah A. Shuttleworth 1
, 
Israel Osmond 1
, 
Calum Strain 1
, 
Jack Binns 2
, 
Jonathan Buhot 3
, 
Sven Friedemann 3
, 
Ross Howie 1, 2
, 
Eugene Gregoryanz 1, 2, 4
, 
E. Gregoryanz 1, 2, 4
, 
Miriam Peña-Alvarez 1
1
 
2
 
3
 
4
 
Publication type: Journal Article
Publication date: 2023-12-12
American Chemical Society (ACS)
scimago Q1
wos Q1
SJR: 1.394
CiteScore: 8.7
Impact factor: 4.6
ISSN: 19487185
Physical and Theoretical Chemistry
General Materials Science
Abstract
Using optical spectroscopy, X-ray diffraction, and electrical transport measurements, we have studied the pressure-induced metallization in BaH2 and Ba8H46. Our combined measurements suggest a structural phase transition from BaH2-II to BaH2-III accompanied by band gap closure and transformation to a metallic state at 57 GPa. The metallization is confirmed by resistance measurements as a function of the pressure and temperature. We also confirm that, with further hydrogenation, BaH2 forms the previously observed Weaire–Phelan Ba8H46, synthesized at 45 GPa and 1200 K. In this compound, metallization pressure is shifted to 85 GPa. Through a comparison of the properties of these two compounds, a question is raised about the importance of the hydrogen content in the electronic properties of hydride systems.
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Shuttleworth H. A. et al. Pressure-Induced Metallization of BaH2 and the Effect of Hydrogenation // Journal of Physical Chemistry Letters. 2023. Vol. 14. No. 50. pp. 11490-11496.
GOST all authors (up to 50) Copy
Shuttleworth H. A., Osmond I., Strain C., Binns J., Buhot J., Friedemann S., Howie R., Gregoryanz E., Gregoryanz E., Peña-Alvarez M. Pressure-Induced Metallization of BaH2 and the Effect of Hydrogenation // Journal of Physical Chemistry Letters. 2023. Vol. 14. No. 50. pp. 11490-11496.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/acs.jpclett.3c02704
UR - https://pubs.acs.org/doi/10.1021/acs.jpclett.3c02704
TI - Pressure-Induced Metallization of BaH2 and the Effect of Hydrogenation
T2 - Journal of Physical Chemistry Letters
AU - Shuttleworth, Hannah A.
AU - Osmond, Israel
AU - Strain, Calum
AU - Binns, Jack
AU - Buhot, Jonathan
AU - Friedemann, Sven
AU - Howie, Ross
AU - Gregoryanz, Eugene
AU - Gregoryanz, E.
AU - Peña-Alvarez, Miriam
PY - 2023
DA - 2023/12/12
PB - American Chemical Society (ACS)
SP - 11490-11496
IS - 50
VL - 14
PMID - 38085985
SN - 1948-7185
ER -
BibTex |
Cite this
BibTex (up to 50 authors) Copy
@article{2023_Shuttleworth,
author = {Hannah A. Shuttleworth and Israel Osmond and Calum Strain and Jack Binns and Jonathan Buhot and Sven Friedemann and Ross Howie and Eugene Gregoryanz and E. Gregoryanz and Miriam Peña-Alvarez},
title = {Pressure-Induced Metallization of BaH2 and the Effect of Hydrogenation},
journal = {Journal of Physical Chemistry Letters},
year = {2023},
volume = {14},
publisher = {American Chemical Society (ACS)},
month = {dec},
url = {https://pubs.acs.org/doi/10.1021/acs.jpclett.3c02704},
number = {50},
pages = {11490--11496},
doi = {10.1021/acs.jpclett.3c02704}
}
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Shuttleworth, Hannah A., et al. “Pressure-Induced Metallization of BaH2 and the Effect of Hydrogenation.” Journal of Physical Chemistry Letters, vol. 14, no. 50, Dec. 2023, pp. 11490-11496. https://pubs.acs.org/doi/10.1021/acs.jpclett.3c02704.