High-resolution scanning tunneling microscope and its adaptation for local thermopower measurements in 2D materials

We present the design, fabrication and discuss the performance of a new combined high-resolution Scanning Tunneling and Thermopower Microscope (STM/SThEM). We also describe the development of the electronic control, the user interface, the vacuum system, and arrangements to reduce acoustical noise and vibrations. We demonstrate the microscope's performance with atomic-resolution topographic images of highly oriented pyrolytic graphite (HOPG) and local thermopower measurements in the semimetal Bi2Te3. Our system offers a tool to investigate the relationship between electronic structure and thermoelectric properties at the nanoscale.PMID:38613941 | DOI:10.1016/j.ultramic.2024.113963

Source: Ultramicroscopy - April 13, 2024 Category: Laboratory Medicine Authors: Jose D Berm údez-Perez Edwin Herrera-Vasco Javier Casas-Salgado Hector A Castelblanco Karen Vega-Bustos Gabriel Cardenas-Chirivi Oscar L Herrera-Sandoval Hermann Suderow Paula Giraldo-Gallo Jose Augusto Galvis Source Type: research