Composition dependent electrical switching behavior of As–Te–I chalcohalide glasses

The electrical switching behavior of bulk, melt-quenched As45Te55−xIx glasses has been studied as a function of composition ( 3 ≤ x ≤ 10 ). It is found that these glasses exhibit a memory to threshold type change in switching behavior around 6 atom% of iodine ( x ≈ 6 ). The observed change in the electrical switching behavior has been understood on the basis of the sharp increase in thermal diffusivity of As45Te55−xIx glasses above x = 6 . It is further found that there is not much change in switching voltages ( V T ) with composition/average coordination number. There is also no pronounced signature of a stiffness transition seen in the variation of V T with composition. However, fluctuations are seen in V T around x = 6 , the composition around which a sharp thermally revering window has been observed in the previous alternating differential scanning calorimetric studies.