Department of Surface and Nanostructures Physics Institute of Physics UMCS
Ixj‘rp(E)T(E,V)dE, for smali bias: -- oc
Within WKB approximation, and for free-electron model:
T(V) = aV + rV3+...
p(E) - surface density of States of the sample T(E, V) - transmission of barrier at bias V p(r, V) - density of States at tip center
normalized plot
reduces rapid increase of dI/dVdue to barrier transmission vs bias dependance
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