Influence of metal electrode stoichiometry on the electron barrier height at CuxTe1?x/Al2O3 interfaces for CBRAM applications
Photoemission of electrons from CuxTe1?x and Te into Al2O3 and SiO2 is observed. The CuxTe1?x stoichiometry has a marginal impact on the electron barrier height. Application of Te electrodes leads to the increase of the barrier height. EWF of Cu and Te on Al2O3 are considerably higher than vacuum WF. Negative charges may be present at the CuxTe1?x/Al2O3 interface.
electron barrier height internal photoemission interface barrier effective work function conductive bridge ram