| http://www.w3.org/ns/prov#value | - In certain embodiments of the present invention, the phase-changeable material layer can be a chalcogen compound containing nitrogen and silicon, such as a nitrogen and silicon doped chalcogen compound, characterized as (AxB100???x)nSicN100???(n+c), wherein x???80, 65???n???99.8, 80???n+c???99.9, 0.1???c???15 and the subscripts are atomic percentages that total 100% of the constituent elements ass
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