Abstract:Differential conductance spectroscopy performed in the high bias regime-in which the applied voltage exceeds the sample work function-is a poor measure of the local density of states due to the effects of the changing tunnel barrier. Additionally, the large applied voltage oftentimes makes constant-height measurement experimentally impractical, lending constant-current spectroscopy an advantageous edge; but the differential conductance in that case is even further removed from the local density of states due t… Show more
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