title: Scanning tunneling spectroscopy under large current flow through the sample.
abstract: We describe a method to make scanning tunneling microscopy/spectroscopy imaging at very low temperatures while driving a constant electric current up to some tens of mA through the sample. It gives a new local probe, which we term current driven scanning tunneling microscopy/spectroscopy. We show spectroscopic and topographic measurements under the application of a current in superconducting Al and NbSe(2) at 100 mK. Perspective of applications of this local imaging method includes local vortex motion experiments, and Doppler shift local density of states studies.
authors.affiliation: Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada, Instituto de Ciencia de Materiales Nicolás Cabrera, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Maldonado
authors.forename: I
authors.initials: I
authors.lastname: Guillamón
authors.forename: H
authors.initials: H
authors.lastname: Suderow
authors.forename: S
authors.initials: S
authors.lastname: Vieira