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Reinvestigating the surface and bulk electronic properties of Cd3As2

Silvan Roth1, Hyungjun Lee1,2, Andrea Sterzi3, Michele Zacchigna4, Antonio Politano5, Raman Sankar6,7, Fang-Cheng Chou7, Giovanni Di Santo3, Luca Petaccia3, Oleg V. Yazyev1,2, Alberto Crepaldi1*

1 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

2 National Centre for Computational Design and Discovery of Novel Materials MARVEL, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

3 Elettra Sincrotrone Trieste, Strada Statale 14 km 163.5, 34149 Trieste, Italy

4 C.N.R.–I.O.M., Strada Statale 14, km 163.5, Trieste 34149, Italy

5 Fondazione Istituto Italiano di Tecnologia, Graphene Labs, via Morego 30, Genova 16163, Italy

6 Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

7 Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan

* Corresponding authors emails: alberto.crepaldi@epfl.ch
DOI10.24435/materialscloud:f2-b1 [version v1]

Publication date: Apr 09, 2021

How to cite this record

Silvan Roth, Hyungjun Lee, Andrea Sterzi, Michele Zacchigna, Antonio Politano, Raman Sankar, Fang-Cheng Chou, Giovanni Di Santo, Luca Petaccia, Oleg V. Yazyev, Alberto Crepaldi, Reinvestigating the surface and bulk electronic properties of Cd3As2, Materials Cloud Archive 2021.59 (2021), doi: 10.24435/materialscloud:f2-b1.

Description

This record contains the experimental results of our reinvestigation of the bulk and surface electronic properties of Cd3As2, a well-known material proposed to realize the 3D Dirac semimetal phase. By using polarization-based matrix element effects in photoemission, we reveal multiple bands crossing the Fermi level, characterized by different orbital character. Those states exhibit also largely different effective masses, and by combining alkali metal deposition and photon energy dependent ARPES, we report that the linearly dispersing band, which was previously interpreted as a bulk Dirac particle, is indeed a 2D surface Dirac state.

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Files and data are licensed under the terms of the following license: Creative Commons Attribution 4.0 International.
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Keywords

Electronic bands 3D Dirac semimetal Polarization and energy dependent ARPES Experimental SNSF MARVEL ERC

Version history:

2021.59 (version v1) [This version] Apr 09, 2021 DOI10.24435/materialscloud:f2-b1