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Pressure-Induced Hydrogen-Hydrogen Interaction in Metallic FeH Revealed by NMR
- Source :
- Physical Review X, Vol 9, Iss 3, p 031008 (2019), Physical Review X, 9 (3), Physical review / X 9(3), 031008 (2019). doi:10.1103/PhysRevX.9.031008
- Publication Year :
- 2019
- Publisher :
- American Physical Society, 2019.
-
Abstract
- Knowledge of the behavior of hydrogen in metal hydrides is the key for understanding their electronic properties. Here, we present an 1H−NMR study of cubic FeH up to 202 GPa. We observe a distinct deviation from the ideal metallic behavior between 64 and 110 GPa that suggests pressure-induced H-H interactions. Accompanying ab initio calculations support this result, as they reveal the formation of an intercalating sublattice of electron density, which enhances the hydrogen contribution to the electronic density of states at the Fermi level. This study shows that pressure-induced H-H interactions can occur in metal hydrides at much lower compression and larger H-H distances than previously thought and stimulates an alternative pathway in the search for novel high-temperature superconductors.<br />Physical Review X, 9 (3)<br />ISSN:2160-3308
- Subjects :
- Materials science
Hydrogen
QC1-999
FOS: Physical sciences
General Physics and Astronomy
chemistry.chemical_element
01 natural sciences
010305 fluids & plasmas
Metal
Condensed Matter::Materials Science
Physics::Plasma Physics
0103 physical sciences
Physics::Atomic and Molecular Clusters
ddc:530
Physics::Chemical Physics
010306 general physics
Astrophysics::Galaxy Astrophysics
Electronic properties
Superconductivity
Condensed Matter - Materials Science
Iron hydride
Physics
Materials Science (cond-mat.mtrl-sci)
chemistry
visual_art
visual_art.visual_art_medium
Physical chemistry
Condensed Matter::Strongly Correlated Electrons
sense organs
Subjects
Details
- Language :
- English
- ISSN :
- 21603308
- Volume :
- 9
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Physical Review X
- Accession number :
- edsair.doi.dedup.....d0b90593513b09bc678010683d42ac97