Magnetic-field asymmetry of nonlinear thermoelectric and heat transport

Nonlinear transport coefficients do not obey, in general, reciprocity relations. We here discuss the magnetic-field asymmetries that arise in thermoelectric and heat transport of mesoscopic systems. Based on a scattering theory of weakly nonlinear transport, we analyze the leading-order symmetry parameters in terms of the screening potential response to either voltage or temperature shifts. We apply our general results to a quantum Hall antidot system. Interestingly, we find that certain symmetry parameters show a dependence on the measurement configuration. © IOP Publishing and Deutsche Physikalische Gesellschaft.SYH and ML were supported by the National Research Foundation (NRF) grant funded by the Korea government (MSIP) (no. 2011-0030046). DS and RL were supported by MINECO grant no. FIS2011-2352.Peer Reviewe