Atomic resolution imaging is demonstrated using a hybrid scanning tunneling/near-field microwave microscope (microwave-STM). The microwave channels of the microscope correspond to the resonant frequency and quality factor of a coaxial microwave resonator, which is built in to the STM scan head and coupled to the probe tip. We find that when the tip-sample distance is within the tunneling regime, we obtain atomic resolution images using the microwave channels of the microwave-STM. We attribute the atomic contrast in the microwave channels to GHz frequency current through the tip-sample tunnel junction. Images of the surfaces of HOPG and Au(111) are presented.
@article{arxiv.1007.0750,
title = {Atomic resolution imaging at 2.5 GHz using near-field microwave microscopy},
author = {Jonghee Lee and Christian J. Long and Haitao Yang and Xiao-Dong Xiang and Ichiro Takeuchi},
journal= {arXiv preprint arXiv:1007.0750},
year = {2011}
}
Comments
9 pages, 5 figures, submitted to Applied Physics Letters