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2020•Journal of Physics Condensed MatterOpen access

A combined laser-based angle-resolved photoemission spectroscopy and two-photon photoemission spectroscopy study of Td –WTe 2

Petra Hein, Stephan Jauernik, Hermann Erk, Lexian Yang, Yanpeng Qi, Yan Sun, Claudia Felser, Michael K. G. Bauer

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Abstract

Abstract Laser-based angle-resolved photoemission spectroscopy and two-photon photoemission spectroscopy are employed to study the valence electronic structure of the Weyl semimetal candidate Td –WTe 2 along two high symmetry directions and for binding energies between ≈ −1 eV and 5 eV. The experimental data show a good agreement with band structure calculations. Polarization dependent measurements provide further information on initial and intermediate state symmetry properties with respect to the mirror plane of the Td structure of WTe 2 .

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Abstract Laser-based angle-resolved photoemission spectroscopy and two-photon photoemission spectroscopy are employed to study the valence electronic structure of the Weyl semimetal candidate Td –WTe 2 along two high symmetry directions and for binding energies between ≈ −1 eV and 5 eV. The experimental data show a good agreement with band structure calculations. Polarization dependent measurements provide further information on initial and intermediate state symmetry properties with respect to the mirror plane of the Td structure of WTe 2 .

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Available abstract

Abstract Laser-based angle-resolved photoemission spectroscopy and two-photon photoemission spectroscopy are employed to study the valence electronic structure of the Weyl semimetal candidate Td –WTe 2 along two high symmetry directions and for binding energies between ≈ −1 eV and 5 eV. The experimental data show a good agreement with band structure calculations. Polarization dependent measurements provide further information on initial and intermediate state symmetry properties with respect to the mirror plane of the Td structure of WTe 2 .

Key concepts: Angle-resolved photoemission spectroscopy, Inverse photoemission spectroscopy, Photoemission spectroscopy, Spectroscopy, Electronic structure, X-ray photoelectron spectroscopy, Valence (chemistry), Atomic physics

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