2003/01/31 by L. Limot, T. Maroutian, P. Johansson +1 · 1 citation
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.91.196801
Accepted in Phys. Rev. Lett., 4 pages, 4 figures, revised version
arxiv created 2003/09/17 · arxiv updated 2009/11/30
We report a quantitative low-temperature Scanning Tunneling Spectroscopy (STS)study on the Ag(111) surface state over an unprecedented range of currents (50 pA to 6 μA)through which we can tune the electric field in the tunnel junction of the microscope. We show that in STS a sizeable Stark effect causes a shift of the surface state binding energy E0.Data taken are reproduced by a one-dimensional potential model calculation, and are found to yield a Stark-free energy E0 in agreement with recent state-of-the-art Photoemission Spectroscopy measurements.