<prompt> E šomiša quantum tunneling phenomenon, yeo e dumelelago dikarolwana go feta ka gare ga lepheko leo ka tlwaelo le ka se kgonego go feta. Electrons tunnel ka gare ga lefela magareng ga di planar metal electrodes, yeo e nngwe le e nngwe e nago le atomo ya adsorbed, yeo e fanago ka tunneling-current density yeo e ka lekwago. Go sekaseka atomo e tee e tšewago bjalo ka ntlha ge e sepela go feta ye nngwe sample e dumelela go ngwalolla go šuthišwa go bapetšwa le go arogana ga lehlakore go ya go ya go ya ga bjale.  <response>: ponagalo ya quantum tunneling 