THE NONLINEAR CONDUCTANCE OF A DOUBLE-QUANTUM DOT IN THE KONDO REGIME

We study the low-temperature dc transport through a nonequilibrium dou ble quantum dot. We show how the Kondo peaks in the spectral density e volve with the interdot tunneling amplitude T-M. The nonlinear dc cond uctance displays one Kondo peak at zero dc voltage. The height and the width of this peak as well as the ratio width/height strongly depend on T-M.