Polaronic Contributions to Friction in a Manganite Thin Film.

ABSTRACT: Despite the huge importance of friction in regulating movement in all natural and technological processes, the mechanisms underlying dissipation at a sliding contact are still a matter of debate. Attempts to explain the dependence of measured frictional losses at nanoscale contacts on the electronic degrees of freedom of the surrounding materials have so far been controversial. Here, it is proposed that friction can be explained by considering the damping of stick-slip pulses in a sliding contact. Based on friction force microscopy studies of La_{(1- x )}Sr _x MnO₃ films at the ferromagnetic-metallic to a paramagnetic-polaronic conductor phase transition, it is confirmed that the sliding contact generates thermally-activated

SUBMITTER: Weber NA 

PROVIDER: S-EPMC8061368 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature