Pressure-Induced Site-Selective Disordering ofGe2Sb2Te5: A New Insight into Phase-Change Optical Recording | Zendy

Alexander V. Kolobov | Zendy; Julien Haines | Zendy; A. Pradel | Zendy; M. Ribes | Zendy; Paul Fons | Zendy; Junji Tominaga | Zendy; Yoshiaki Katayama | Zendy; Tahar Hammouda | Zendy; T. Uruga | Zendy

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Pressure-Induced Site-Selective Disordering ofGe2Sb2Te5: A New Insight into Phase-Change Optical Recording

Author(s) -

Alexander V. Kolobov,

Julien Haines,

A. Pradel,

M. Ribes,

Paul Fons,

Junji Tominaga,

Yoshiaki Katayama,

Tahar Hammouda,

T. Uruga

Publication year - 2006

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.97.035701

Subject(s) - metastability , hydrostatic pressure , amorphous solid , phase (matter) , hydrostatic equilibrium , materials science , phase transition , physics , condensed matter physics , thermodynamics , crystallography , chemistry , quantum mechanics

We demonstrate that Ge2Sb2Te5, the material of choice in phase-change optical recording (such as DVD-RAM), can be rendered amorphous by the application of hydrostatic pressure. It is argued that this structural change is due to a very strong second-nearest-neighbor Te-Te interaction that determines the long-range order in the metastable cubic phase of Ge2Sb2Te5 and also to the presence of vacancies. This newly discovered phenomenon suggests that pressure is an important factor for the formation of the amorphous phase which opens new insight into the mechanism of phase-change optical recording

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