Author/Authors :
Severin، نويسنده , , N. and Groeper، نويسنده , , S. and Kniprath، نويسنده , , R. and Glowatzki، نويسنده , , H. and Koch، نويسنده , , N. and Sokolov، نويسنده , , I.M. and Rabe، نويسنده , , J.P.، نويسنده ,
Abstract :
We investigated the scattering of current–voltage data obtained with scanning tunneling spectroscopy (STS) at room temperature at a solid–liquid interface on highly oriented pyrolytic graphite (HOPG) and in ultrahigh vacuum on HOPG and Au(1 1 1). For both experimental conditions, the data scattering can be described by a lognormal function for a moderate number of subsequent measurements. The lognormal distribution of the current can be explained by a normal distribution of the tip–surface distance. We give a simple empirical rule for STS data sorting.
Keywords :
Scanning tunneling spectroscopy (STS) , Scanning tunneling microscopy , lognormal distribution , Solid–liquid interfaces , HOPG
