Pressure-Induced Hydrogen-Dominant Metallic State in Aluminum Hydride

DOI: 10.1103/PhysRevLett.100.045504
PMID: 18352297

Authors: Monica Amboage (Diamond Light Source) , Igor Goncharenko (Laboratoire Léon Brillouin C.E.A.-C.N.R.S.) , M. I. Eremets (Max Planck Institute) , M. Hanfland (ESRF) , J. S. Tse (Department of Physics and Engineering Physics, University of Saskatchewan) , Y. Yao (Department of Physics and Engineering Physics, University of Saskatchewan) , I. A. Trojan (Max Planck Institute)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 100 (4)

State: Published (Approved)
Published: February 2008

Abstract: Two structural transitions in covalent aluminum hydride AlH3 were characterized at high pressure. A metallic phase stable above 100 GPa is found to have a remarkably simple cubic structure with shortest first-neighbor H-H distances ever measured except in H2 molecule. Although the high-pressure phase is predicted to be superconductive, this was not observed experimentally down to 4 K over the pressure range 120-164 GPa. The results indicate that the superconducting behavior may be more complex than anticipated.

Subject Areas: Physics

Facility: ESRF

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