Scanning tunneling microscopy
= Scanning tunneling microscopy
= Scanning tunnelling microscopy
{synonym}
<Scanning tunneling microscopy> uses a <scanning tunneling microscope> to map a surface from the <electric current> across a <tunnel junction>. In constant-current operation, <feedback control> adjusts the tip height to maintain a chosen <electric current>. The <current-distance test of vacuum tunnelling> explains the underlying distance sensitivity and its measurement limits.