Superconductivity in oxygen

K. Shimizu (), K. Suhara, M. Ikumo, M. I. Eremets and K. Amaya
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K. Shimizu: Faculty of Engineering Science, Osaka University
K. Suhara: Faculty of Engineering Science, Osaka University
M. Ikumo: Faculty of Engineering Science, Osaka University
M. I. Eremets: CREST of Japan Science and Technology Corporation
K. Amaya: Faculty of Engineering Science, Osaka University

Nature, 1998, vol. 393, issue 6687, 767-769

Abstract: Abstract Among the simple diatomic molecules, oxygen is of particular interest because it shows magnetism at low temperatures. Moreover, at pressures exceeding 95 GPa (∼0.95 Mbar), solid molecular oxygen becomes metallic, accompanied by a structural transition1. The metallization process is characterized by an increase in optical reflectivity2, and a change in the slope of the resistance–temperature curve3. Here we report that at pressures of around 100 GPa, solid oxygen becomes superconducting, with a transition temperature of 0.6 K. The transition is revealed by both resistivity measurements and a Meissner demagnetization signal.

Date: 1998
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DOI: 10.1038/31656

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