How do you interpret scanning tunneling spectroscopy of ZnO thin film?

09 September 2014 1 5K Report

I want to interpret STS graph of ZnO thin film in the image below.

First, i think the SETPOINT of your tunneling current while taking the I-V curves should be lower, as the tunneling current has overloaded from -3V to -1V. Second, I-V curve is usually used for interpreting the electrical properties of carriers (eletroons or holes), while the differentials of I-V curve are more commonly usful for interpreting LDOS (local density of states) of surfaces. So ,you should measure the dI/dV curve directly on you samples.

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