Papikyan A. K1, Harutyunyan S. R.2,1, Aghamalyan N. R.2,1, Hovsepyan R. K.2,1, Khachaturova A. 2, Petrosyan S. I.2,1, Badalyan G. R.2, Kafadaryan Y. A.2,1
1Russian-Armenian University, Yerevan, Armenia
2Institute for Physical Research, National Academy of Sciences of Armenia, Ashtarak, Armenia
Email: papikyanarman.pap@gmail.com, sergeyhar56@gmail.com, natagham@gmail.com, ruben.ovsepyan@mail.ru, annakhachat@mail.ru, spetrosyan8@gmail.com, gbadalyan@mail.ru, ekafadaryan@gmail.com
Single-layer Sb2Te3 films and three-layer Sb2Te3/Sb2S3/Sb2Te3 structures are obtained by thermal vacuum deposition. Their thermoelectric characteristics have been investigated in a wide temperature range (5-350 K). It is shown that the conductivity of Sb2Te3/Sb2S3/Sb2Te3 has a semiconductor behavior, the resistivity is an order of magnitude higher than the resistivity of the Sb2Te3 film; the Seebeck coefficient of Sb2Te3/Sb2S3/Sb2Te3 is 1.5 and 3 times higher than the Seebeck coefficient of the film and single-crystal Sb2Te3, respectively. The current-voltage characteristics of the Sb2Te3 film exhibit memristive properties with unipolar resistive switching, whereas Sb2Te3/Sb2S3/Sb2Te3 can be considered as a memristor with a parallel connected capacitance. Keywords: Sb2S3, Sb2Te3, films, volt-ampere characteristic, Seebeck coefficient, memristor.
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