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Unique melting behavior in phase-change materials for rewritable data storage
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Condensed Matter Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Condensed Matter Theory.
2007 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 98, no 5, 055505- p.Article in journal (Refereed) Published
Abstract [en]

Ge2Sb2Te5 (GST) is a technologically very important phase-change material for rewritable optical and electrical storage because it can be switched rapidly back and forth between amorphous and crystalline states for millions of cycles by appropriate pulsed heating. However, an understanding of this complicated phenomenon has not yet been achieved. Here, by abĀ initio molecular dynamics, we unravel the reversible phase transition process of GST. The melting of rocksalt-structured GST is unique in that it forms two-dimensional linear or tangled clusters while keeping order in the perpendicular direction. It is this specific character that results in the fast and reversible phase transition between amorphous and crystalline and hence rewritable data storage.

Place, publisher, year, edition, pages
2007. Vol. 98, no 5, 055505- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-145617DOI: 10.1103/PhysRevLett.98.055505ISI: 000244646100048OAI: oai:DiVA.org:uu-145617DiVA: diva2:396548
Available from: 2011-02-10 Created: 2011-02-09 Last updated: 2017-12-11Bibliographically approved

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Ahuja, Rajeev

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