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Tunability of the topological nodal-line semimetal phase in ZrSiX-type materials (X=S, Se, Te)

M. Mofazzel Hosen, Klauss Dimitri, Ilya Belopolski, Pablo Maldonado, Raman Sankar, Nagendra Dhakal, Gyanendra Dhakal, Taiason Cole, Peter M. Oppeneer, Dariusz Kaczorowski, Fangcheng Chou, M. Zahid Hasan, Tomasz Durakiewicz, and Madhab Neupane
Phys. Rev. B 95, 161101(R) – Published 3 April 2017
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Abstract

The discovery of a topological nodal-line (TNL) semimetal phase in ZrSiS has invigorated the study of other members of this family. Here, we present a comparative electronic structure study of ZrSiX (where X=S, Se, Te) using angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations. Our ARPES studies show that the overall electronic structure of ZrSiX materials comprises the diamond-shaped Fermi pocket, the nearly elliptical-shaped Fermi pocket, and a small electron pocket encircling the zone center (Γ) point, the M point, and the X point of the Brillouin zone, respectively. We also observe a small Fermi surface pocket along the MΓM direction in ZrSiTe, which is absent in both ZrSiS and ZrSiSe. Furthermore, our theoretical studies show a transition from nodal-line to nodeless gapped phase by tuning the chalcogenide from S to Te in these material systems. Our findings provide direct evidence for the tunability of the TNL phase in ZrSiX material systems by adjusting the spin-orbit coupling strength via the X anion.

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  • Received 17 August 2016
  • Revised 1 November 2016

DOI:https://doi.org/10.1103/PhysRevB.95.161101

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

M. Mofazzel Hosen1, Klauss Dimitri1, Ilya Belopolski2, Pablo Maldonado3, Raman Sankar4,5, Nagendra Dhakal1, Gyanendra Dhakal1, Taiason Cole1, Peter M. Oppeneer3, Dariusz Kaczorowski6, Fangcheng Chou5, M. Zahid Hasan2, Tomasz Durakiewicz7,8, and Madhab Neupane1,*

  • 1Department of Physics, University of Central Florida, Orlando, Florida 32816, USA
  • 2Joseph Henry Laboratory and Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
  • 3Department of Physics and Astronomy, Uppsala University, P.O. Box 516, S-75120 Uppsala, Sweden
  • 4Institute of Physics, Academia Sinica, Taipei 10617, Taiwan
  • 5Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
  • 6Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50-950 Wroclaw, Poland
  • 7Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 8Institute of Physics, Maria Curie-Sklodowska University, PL-20-031 Lublin, Poland

  • *Corresponding author: mneupane2002@gmail.com

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Issue

Vol. 95, Iss. 16 — 15 April 2017

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