Infrared spectroscopy study of the nodal-line semimetal candidate ZrSiTe under pressure: Hints for pressure-induced phase transitions

J. Ebad-Allah, M. Krottenmüller, J. Hu, Y. L. Zhu, Z. Q. Mao, and C. A. Kuntscher
Phys. Rev. B 99, 245133 – Published 19 June 2019
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Abstract

We studied the effect of external pressure on the optical response of the nodal-line semimetal candidate ZrSiTe by reflectivity measurements. At pressures of a few GPa, the reflectivity, optical conductivity, and loss function are strongly affected in the whole measured frequency range (20016500cm1), indicating drastic changes in the electronic band structure. The pressure-induced shift of the electronic bands affects both the intraband and interband transitions. We find anomalies in the pressure dependence of several optical parameters at the pressures Pc14.1GPa and Pc26.5GPa, suggesting the occurrence of two phase transitions of either structural or electronic type.

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  • Received 3 May 2019

DOI:https://doi.org/10.1103/PhysRevB.99.245133

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

J. Ebad-Allah1,2, M. Krottenmüller1, J. Hu3, Y. L. Zhu4,5, Z. Q. Mao4,5, and C. A. Kuntscher1,*

  • 1Experimentalphysik II, Augsburg University, 86159 Augsburg, Germany
  • 2Department of Physics, Tanta University, 31527 Tanta, Egypt
  • 3Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA
  • 4Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16803, USA
  • 5Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA

  • *christine.kuntscher@physik.uni-augsburg.de

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Vol. 99, Iss. 24 — 15 June 2019

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