Peculiarities of magnetoresistance in InSb whiskers at cryogenic temperatures

Low-temperature magnetoresistance of GaSb whiskers

“…5(c)) and associated with weak localization as for n-type InSb whiskers in work [24]. Perhaps a significant reduction of magnetoresistance effect associated with the manifestation of Kondo effect in these crystals.…”

“…Our studies have shown, that the Shubnikov-de Haas oscillations are observed in the low-temperature range. Magnetophonon and Shubnikov-de Haas oscillations of magnetoresistance were also revealed in n-type conductivity Ge and InSb whiskers, respectively [23,24].…”

“…Magnetoresistance oscillation period P in the opposite field for quadratic dispersion law is described as follows [24]: where e is the elementary charge;  is the Planck constant; m с is effective cyclotron mass in c is speed of light. Oscillation period was found from the experimental data.…”

“…Besides from magnetoresistance studies (Figs. 2-4) the Dingle temperature was determined as the ratio of the amplitudes of Shubnikov-de Haas oscillations for two successive maxima magnetoresistance due to equations from work [24]. The effective mass of electrons m с = 0.041m 0 and Dingle temperature T D up to 7.5 K were found for n-type conductivity GaSb whiskers with impurity concentration in the vicinity to MIT from metal side of the transition.…”

“…The temperature dependences of mobility for GaSb microcrystals was taken from our previous studies [26]. From the weak localization theory is known the sign of conductivity correction depends on the relation between phase relaxation time of the electron wave ϕ τ and spin relaxation time owing to spin-orbit interaction so τ [27].…”