Mechanistic understanding of the effect of rigidity percolation on structural relaxation in supercooled germanium selenide liquids

Journal Article · Thu Jul 01 00:00:00 EDT 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.82.014203· OSTI ID:21386912

Gjersing, E L; Sen, S; Youngman, R E ^[1]

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1. Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, California 95616 (United States)

High-resolution {sup 77}Se nuclear magnetic resonance spectroscopy is used to investigate the rotational dynamics of Se atoms in Ge{sub x}Se{sub 100-x} supercooled liquids with 5<=x<=23. The Se atoms in Se-Se-Se linkages are found to be significantly more mobile compared to those in Ge-Se-Se/Ge linkages. The time scale of the rotational dynamics of Se-Se-Se linkages and its temperature dependence are nearly identical for liquids with x<=17 but the time scale displays an abrupt increase for the liquids with x=20 and 23, at and above the rigidity percolation threshold. Such a dynamical transition is shown to be consistent with a sudden elastic stiffening of the atomic network of Ge{sub x}Se{sub 100-x} supercooled liquids at the percolation threshold.

• OSTI ID: 21386912
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 1; Other Information: DOI: 10.1103/PhysRevB.82.014203; (c) 2010 The American Physical Society; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
GERMANIUM
GERMANIUM ALLOYS
LIQUIDS
NUCLEAR MAGNETIC RESONANCE
RELAXATION
RESOLUTION
SELENIUM 77
SELENIUM ALLOYS
SPECTROSCOPY
TEMPERATURE DEPENDENCE
ALLOYS
ELEMENTS
EVEN-ODD NUCLEI
FLUIDS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAGNETIC RESONANCE
METALS
NUCLEI
RADIOISOTOPES
RESONANCE
SECONDS LIVING RADIOISOTOPES
SELENIUM ISOTOPES
STABLE ISOTOPES