The effect of cycle deformation on the AC conductivity of (Bi0.3Sb0.7)2Te3 films


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It has been found that the resistance of the (Bi0.3Sb0.7)2Te3 porous polycrystalline film fabricated by thermal vacuum evaporation at substrate temperature Ts ≤ 363 K drastically decreases near the threshold AC frequency ω0 ≈ 105 Hz as low as the resistance of dense films with Ts ≈ 423 K. After the action of N ≈ 105 cycles of mechanical deformation with amplitude ε = ±1 × 10–3 a.u., the film resistance increases by 1.5 times and the threshold frequency decreases in almost 102 times, which can qualitatively be accounted for by the model of microcontacting blocks.

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Kh. Sulaimonov

Fergana Polytechnical Institute

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Email: uzferfizika@mail.ru
Uzbequistão, Fergana, 150107

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