Fig. 2From: Temperature-Dependent Non-linear Resistive Switching Characteristics and Mechanism Using a New W/WO3/WOx/W StructureXPS of two areas marked (1) and (2) in the HRTEM image of Fig. 1c. a Region (1) shows the presence of WO3. b Region (2) shows the presence of metallic W or WOx Back to article page