Atomic-scale study of type-II Dirac semimetal PtTe2surface

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

doi:10.1088/2515-7639/ac92a8

Atomic-scale study of type-II Dirac semimetal PtTe₂surface

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

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.

Original language	English
Article number	044003
Journal	JPhys Materials
Volume	5
Issue number	4
DOIs	https://doi.org/10.1088/2515-7639/ac92a8
Publication status	Published - 2022 Oct

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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10.1088/2515-7639/ac92a8

Cite this

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title = "Atomic-scale study of type-II Dirac semimetal PtTe2surface",

abstract = "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.",

author = "{Casado Aguilar}, Pablo and Fabian Calleja and Kuo, {Chia Nung} and Lue, {Chin Shan} and Barun Ghosh and Amit Agarwal and Antonio Politano and {V{\'a}zquez De Parga}, {Amadeo L.} and Rodolfo Miranda and Silva-Guill{\'e}n, {Jose Angel} and Manuela Garnica",

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year = "2022",

month = oct,

doi = "10.1088/2515-7639/ac92a8",

language = "English",

volume = "5",

journal = "JPhys Materials",

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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

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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JF - JPhys Materials

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ER -

Atomic-scale study of type-II Dirac semimetal PtTe₂surface

Abstract

All Science Journal Classification (ASJC) codes

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