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Uniaxial-stress-driven transformation in cold compressed glassy carbon
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2017 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, no 10, 101901Article in journal (Refereed) Published
Abstract [en]

We show that transformation of glassy carbon (GC) into a translucent superhard carbon phase by cold-compression is obtained in the presence of a uniaxial stress field. This transition accompanies with sp(2) to sp(3) bonding change in GC, and it is found that the uniaxial stress strongly favors this bonding transition. The transformation of GC causes photoluminescence and significantly increases light transmissivity. Upon decompression, the high pressure phase can be maintained under large uniaxial stress at a chamber pressure even down to similar to 10GPa. We discuss possible mechanisms of these transitions by a distinct bonding process that occurs in noncrystalline carbon.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2017. Vol. 111, no 10, 101901
National Category
Inorganic Chemistry Condensed Matter Physics
Identifiers
URN: urn:nbn:se:umu:diva-140045DOI: 10.1063/1.4996278ISI: 000410059200011OAI: oai:DiVA.org:umu-140045DiVA: diva2:1147913
Available from: 2017-10-09 Created: 2017-10-09 Last updated: 2017-10-09Bibliographically approved

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Sundqvist, Bertil
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