Because of {HEAD ~ the energy difference} 410 that exists between {TAIL ~ the lowest empty electron energy state} 411 1 and the Fermi level Ef, electrons cannot tunnel from the control gate 408 into the quantum dot 405 
exists between
Because of { HEAD ~ the energy difference } 410 that exists between { TAIL ~ the lowest empty electron energy state } 411 1 and the Fermi level Ef , electrons can not tunnel from the control gate 408 into the quantum dot 405
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH