Measuring current effect on low-temperature resistivity of n-type Bi₁.₉Lu₀.₁Te₃ compound: Probing the changing in conductivity mechanism under weak electric field

Abstract

he measuring current effect on low-temperature resistivity of Bi₁.₉Lu₀.₁Te₃ has been analyzed. . Temperature behavior of the resistivity is connected to two mechanisms. High-temperature mechanism (above 35 K) is due to acoustic phonon scattering. For this mechanism, the resistivity is growing with both increasing temperature and increasing current (positive current effect). Low-temperature mechanism (below 35 K) results in appearance of resistivity minimum at low temperatures. Below the minimum, the resistivity is growing with decreasing temperature