Crossover from the weak to strong-field behavior of the longitudinal interlayer magnetoresistance in quasi-two-dimensional conductors

Магнитоквантовые осцилляции

Анотація

We investigate the monotonic growth of longitudinal interlayer magnetoresistance R̅_zz(B_z), analyticallyand numerically in the self-consistent Born approximation. We show that in a weak magnetic field the monotonic part of R̅_zz(B_z) is almost constant and starts to grow only above the crossover field B_c, when the Landau levels (LL) become isolated, i.e., when the LL separation becomes greater than the LL broadening. In higher field B_z >> B_c, R̅_zz(B_z) µ B_z^1/2 in agreement with previous works.