TY - JOUR
T1 - Atomic-scale study of type-II Dirac semimetal PtTe2surface
AU - Casado Aguilar, Pablo
AU - Calleja, Fabian
AU - Kuo, Chia-Nung
AU - Lue, Chin Shan
AU - Ghosh, Barun
AU - Agarwal, Amit
AU - Politano, Antonio
AU - Vázquez De Parga, Amadeo L.
AU - Miranda, Rodolfo
AU - Silva-Guillén, Jose Angel
AU - Garnica, Manuela
N1 - Funding Information:
The authors thank F de Juan for fruitful discussions. This work was supported by the Spanish Ministry of Science and Innovation (Grant Nos. PGC2018-093291-B-I00, PGC2018-097028-A-I00 and PGC2018-098613-B-C21) and the Comunidad de Madrid (Project S2018/NMT-4511, NMAT2D). IMDEA Nanociencia and IFIMAC acknowledge financial support from the Spanish Ministry of Science and Innovation, through the ‘Severo Ochoa’ (Grant No. CEX2020-001039-S) and ‘María de Maeztu’ (Grant No. CEX2018-000805-M) Programme for Centres of Excellence in R&D, respectively. M G has received financial support through the ‘Ramón y Cajal’ Fellowship Program (RYC2020-029317-I).
Publisher Copyright:
© 2022 The Author(s). Published by IOP Publishing Ltd.
PY - 2022/10
Y1 - 2022/10
N2 - 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.
AB - 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.
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U2 - 10.1088/2515-7639/ac92a8
DO - 10.1088/2515-7639/ac92a8
M3 - Article
AN - SCOPUS:85139796579
SN - 2515-7639
VL - 5
JO - JPhys Materials
JF - JPhys Materials
IS - 4
M1 - 044003
ER -