Atomic-scale study of type-II Dirac semimetal PtTe2 surface

Autor:	Pablo Casado Aguilar, Fabian Calleja, Chia-Nung Kuo, Chin Shan Lue, Barun Ghosh, Amit Agarwal, Antonio Politano, Amadeo L Vázquez de Parga, Rodolfo Miranda, Jose Angel Silva-Guillén, Manuela Garnica
Přispěvatelé:	UAM. Departamento de Física de la Materia Condensada
Rok vydání:	2022
Předmět:	Interference Map Dichalcogenides Transition Metal Dichalcogenides Física Density-Functional-Theory General Materials Science Condensed Matter Physics Dirac Semimetal Quasiparticles Atomic and Molecular Physics and Optics
Zdroj:	Repositorio Institucional del Instituto Madrileño de Estudios Avanzados en Nanociencia instname
ISSN:	2515-7639
Popis:	Dirac semimetals (DSM) host linear bulk bands and topologically protected surface states, giving rise to exotic and robust properties. Platinum ditelluride (PtTe2) belongs to this interesting group of topological materials. Here, we employ scanning tunneling microscopy (STM) in combination with first-principles calculations to visualize and identify the native defects at the surface of a freshly cleaved PtTe2 crystal. Around these defects, short-wavelength electron density oscillations are observed. Fourier transform analysis of the energy-dependent quasiparticle interference patterns is in good agreement with our calculated joint density of states, demonstrating the singular properties of the surface of this type-II DSM. Our results evidence the power of STM in understanding the surface of topological materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e72c820bad0693e194e136525a8b428 https://doi.org/10.1088/2515-7639/ac92a8 Zobrazit plný text záznamu