Issues

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2018

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vol. 16 /

Issue 1

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S. Sh. Kahramanov and N. M. Abdullayev
«Nonequilibrium Processes During Self-Intercalation in Layered Crystals of the \(A^V_2B^{VI}_3\) Type»
141–152 (2018)

PACS numbers: 61.05.cp, 66.30.Pa, 68.35.bg, 68.35.Dv, 68.35.Ja, 68.37.Ps, 71.20.Tx

A correlation is revealed between the processes of formation of bulk nanoislands with a significant deviation of the concentration of vacancies from the equilibrium one and with a presence of migration of impurity atoms from unstable regions into the interlayer space Te(1)–Te(1) \(A^V_2B^{VI}_3\)<Cu> during the self-intercalation process. Changes in both the thermal e.m.f. and the electrical conduction in the \(Bi_2Te_3\)<Cu> system at room temperature with time as well as the formation of interlayer nanoislands confirm the instability of impurity centres within the layered \(A^V_2B^{VI}_3\)-type<easily-diffusing impurity> systems. A structural model is proposed that takes into account the migration of copper-impurity atoms from unstable vacancy regions (repeller zones) to the (0001)\(A^V_2B^{VI}_3\)<Cu> surface (attractor zone).

Keywords: defects, crystals, mass transfer, dynamic systems, attractor, repeller

https://doi.org/10.15407/nnn.16.01.141

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