Local Transport Measurement Using Scanning Tunneling Potentiometry

Scanning probes are revolutionizing the study of materials atomic and  mesoscopic length scales.  We are moving beyond point measurements to develop a cryogenic scanning tunneling potentiometer capable of  investigating transport process in superconductors, grain boundaries and domain walls, and inhomogenrious materials, all on submicron  length scales.

Reference: Potentiometric imaging of (La-Sr)MnO3 thin films,  J.J. Versluijs, F. Ott, and J.M.D. Coey, App. Phys. Lett. 75, 1152 (1999).