Pseudo-self-organized topological phases in glassy selenides for IR photonics

O. Shpotyuk and R. Golovchak.

Physica Status Solidi C, vol. 8, No. 9, 2011, p. 2572–2576.

Abstract

Network-forming cluster approach is applied to As-Se and Ge-Se glasses to justify their tendency to selforganization. It is shown that reversibility windows determined by temperature-modulated differential scanning calorimetry using short-term aged or as-prepared samples do not necessary coincide with self-organized phase in these materials. The obtained results testify also pseudoself-organization phenomenon in Ge-Se glasses: overconstrained outrigger raft structural units built of two edge- and four corner-shared tetrahedra are interconnected via optimally-constrained ≡Ge-Se-Se-Ge≡ bridges within the range of compositions identified previously as self-organized phase by temperature modulated differential scanning calorimetry technique.

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