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Evidence for the Intermediate Phase in Chalcogenide Glasses

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Phase Transitions and Self-Organization in Electronic and Molecular Networks

Part of the book series: Fundamental Materials Research ((FMRE))

Conclusions

Raman scattering and T-modulated Differential Scanning Calorimetry measurements on several families of chalcogenide glasses have been performed. Comprehensive results are now available on the GexSe1−x and SixSe1−x binary glass systems, where rigidity is found to onset in two steps; a second-order transition at xc(l)=0.20 in both binaries from a floppy to an unstressed rigid phase, and a first-order transition at xc(2)=0.26 for Ge-Se,=0.27 for Si-Se binary from an unstressed rigid to a stressed rigid phase. The two transitions (xc(1), xc(2)) define the bounds of an intermediate phase that separates the floppy from the stressed rigid phase. The near absence of the non-reversing heat-flow, ΔHnr, constitutes evidence for the stress-free nature of the backbone of glass compositions in the intermediate phase. Light-induced melting of the intermediate phase in micro-Raman measurements on the Ge-Se glass system has also been observed.

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Authors and Affiliations

  1. Department of Electrical, Computer Engineering and Computer Science, University of Cincinnati Cincinnati, OH, 45221-0030

    P. Boolchand, W.J. Bresser, D.G. Georgiev, Y. Wang & J. Wells

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  1. P. Boolchand
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  2. W.J. Bresser
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  3. D.G. Georgiev
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  4. Y. Wang
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  5. J. Wells
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Editor information

Editors and Affiliations

  1. Michigan State University, East Lansing, Michigan

    M. F. Thorpe

  2. Lucent Technologies, Bell Labs Innovations, Murray Hill, New Jersey

    J. C. Phillips

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© 2002 Kluwer Academic Publishers

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Boolchand, P., Bresser, W., Georgiev, D., Wang, Y., Wells, J. (2002). Evidence for the Intermediate Phase in Chalcogenide Glasses. In: Thorpe, M.F., Phillips, J.C. (eds) Phase Transitions and Self-Organization in Electronic and Molecular Networks. Fundamental Materials Research. Springer, Boston, MA. https://doi.org/10.1007/0-306-47113-2_5

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  • DOI: https://doi.org/10.1007/0-306-47113-2_5

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-0-306-46568-0

  • Online ISBN: 978-0-306-47113-1

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