Implementación de técnica lock-in en microscopía de efecto túnel en condiciones de alto vacío

Abstract

In the present work, a theoretical study of the tunnel effect microscopy technique is developed to obtain differential conductance, making use of the Lock-In technique during the research stay in the advanced microscopy laboratories of the Central University of Bogotá . Also participating in the calibration of the tunnel effect microscope built there, as well as in the implementation of the high vacuum system, also built in these facilities. This system improves the measurement conditions, which leads to obtaining better defined surfaces, guaranteeing clean and stable surfaces, obtaining within the development of this internship the first topography image with the STM, which will serve as a calibration basis for future measurements.