Abstract
Strain influence on the behavior of temperature dependences of resistance was studied in the n-type conductivity GaSb whiskers with tellurium concentration 1.7 1018 сm–3. Analyzing these dependences in the temperature range 4.2–30 K strain inducted metal–insulator transition and partial superconductivity were found in the whiskers. The transverse and longitudinal magnetoresistances for unstrained and strained GaSb whiskers were also studied in ranges of magnetic field 0–3 T and temperature 1.5–60 K. The effects, such as a superconductivity and weak anti-localization were observed for unstrained and strained samples. The upper critical zero magnetic fields for superconductivity suppression were obtained in the whiskers. Strain was shown to decrease the superconductivity in GaSb samples. The strain induced splitting of degenerate level on two components with opposite and parallel spins was found in the n-type conductivity GaSb whiskers due to weak localization and anti-localization effects, respectively.
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