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Pressure-induced transformations and superconductivity of amorphous germanium

Abstract:

The effect of pressure on amorphous Ge was probed by Raman spectroscopy combined with molecular-dynamics simulations. A large jump occurs in the principal peak position due to nearest-neighbor Ge-Ge vibrations at 11-12 GPa and 7-5.5 GPa, respectively, during increasing/decreasing pressure due to a polyamorphic transition occurring between the low-density amorphous semiconductor and a metallic high-density polyamorph (HDA). We measured the superconducting transition temperature (Tc) using magn...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.82.020507

Authors


Barkalov, OI More by this author
Tissen, VG More by this author
McMillan, PF More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
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Journal:
PHYSICAL REVIEW B
Volume:
82
Issue:
2
Publication date:
2010-07-15
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:48b26704-fdec-4e6b-87ad-e67f66ac2d1f
Source identifiers:
65938
Local pid:
pubs:65938
Language:
English

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