  We investigate the nonlinear regime of charge and energy transport through
Coulomb-blockaded quantum dots. We discuss crossed effects that arise when
electrons move in response to thermal gradients (Seebeck effect) or energy
flows in reaction to voltage differences (Peltier effect). We find that the
differential thermoelectric conductance shows a characteristic Coulomb
butterfly structure due to charging effects. Importantly, we show that
experimentally observed thermovoltage zeros are caused by the activation of
Coulomb resonances at large thermal shifts. Furthermore, the power dissipation
asymmetry between the two attached electrodes can be manipulated with the
applied voltage, which has implications for the efficient design of nanoscale
coolers.
