Abstract
The count of Lagrangian bonding constraints nc(y) in ternary Ge35S75-yIy glasses (0 < y < 0.30) is established from the molecular structure using Raman scattering and first-principles cluster calculations. The results show that nc(y) decreases to 3 as y increases close to yc = 0.162(3), where a sharply defined global minimum in the nonreversing heat flow, ΔHnr(y) near Tg, is observed in scanning calorimetry. Here we have a rigidity transition induced by I dangling ends, with its sharpness resulting from the absence of self-organization in the random network.
Original language | English |
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Pages (from-to) | 185503-1-185503-4 |
Journal | Physical Review Letters |
Volume | 87 |
Issue number | 18 |
DOIs | |
State | Published - 2001 |