Dear Sir
we are working on CNT device and calculating I-V graph for the device. We are calculating & getting +ve transmission spectrum at different voltages. But when we plots I-V graph, we get -ve current at +ve values of voltage and +ve current at -ve voltage (in low voltage region up 1 V) thereafter the current increases from zero to some positive value.
We have tried DFT with krylov/direct/recursion and with both electrode temperature 300 K. Its ambiguous to get -ve current at positive voltages
.
Kindly help
(I-V plot is attached for your kind reference)
Thank you
