Abstract
The highly anisotropic resistivities in strained manganites are theoretically studied using the two-orbital
double-exchange model. At the nanoscale, the anisotropic double-exchange and Jahn-Teller distortions are
found to be responsible for the robust anisotropic resistivities observed here via Monte Carlo simulations. An
unbalance in the population of orbitals caused by strain is responsible for these effects. In contrast, the
anisotropic superexchange is found to be irrelevant to explain our results. Our model study suggests that highly
anisotropic resistivities could be present in a wide range of strained manganites, even without submicrometerscale
phase separation. In addition, our calculations also confirm the formation of anisotropic clusters in
phase-separated manganites, which magnifies the anisotropic resistivities.
