Weak antilocalization within a genuine multiband model

摘要: Weak antilocalization signatures in magnetotransport measurements provide specific information about the spin-orbit coupling at oxide interfaces. However, for many of these two-dimensional systems, commonly used theory single-band electrons is not appropriate. The atomic coupling, jointly with inversion symmetry breaking terms, mixes states different bands, making a multiband treatment Cooperon equation unavoidable. Here we consider an effective ${t}_{2g}$ model that allows decomposition into pseudospin representation $1/2\phantom{\rule{0.16em}{0ex}}\ensuremath{\bigoplus}\phantom{\rule{0.16em}{0ex}}3/2$. For spin-$3/2$ sector, supervening quintet and septet channels from $3/2\phantom{\rule{0.16em}{0ex}}\ensuremath{\bigotimes}\phantom{\rule{0.16em}{0ex}}3/2$ representations alter quantum correction considerably. We study impact spin winding number Fermi surface report new experimentally accessible structure magnetoconductivity sensitive to ratio single triple contributions.