Year: 2019
Type: article
Abstract: Using a low-temperature scanning tunneling microscope (STM), we investigated the role of atomic-scale defects of a cleaved SnSe(100) surface on the electronic structure around them. We found in empty-state STM images that Sn vacancies induce dark contrast around them, proving their role as a p-type dopant. The vacancies are also accompanied with an X-shaped dark pattern reflecting the structural asymmetry of the terminating layer. In addition, in empty-state STM images, a 1 × 3 superstructure was observed around a bright-contrasted defect, which is presumed to be a defect-induced charge density wave driven by strong electron-phonon interaction.
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G1220405160, G1727826986, G3951041218, Development of angle-resolved tunneling spectroscopy down to the micro Kelvin range, Study of magnets hosting strongly correlated Dirac fermions, Characterization and control of spin dynamics by spin-resonance scanning tunneling microscopy, Atomic-scale imaging of spin current generated by the ferromagnetic resonance excitation, Magnon dispersion measurement using compressive sensing for scanning tunneling microscopy
OpenAlex ID: W2952642082