Charge density wave modulation and gap measurements in CeTe3

U. Ralević, N. Lazarević, A. Baum, H.-M. Eiter, R. Hackl, P. Giraldo-Gallo, I. R. Fisher, C. Petrovic, R. Gajić, and Z. V. Popović
Phys. Rev. B 94, 165132 – Published 14 October 2016

Abstract

We present a study of charge density wave (CDW) ordering in CeTe3 at room temperature using a scanning tunneling microscope and Raman spectroscopy. Two characteristic CDW ordering wave vectors obtained from the Fourier analysis are assessed to be |c*q|=4.19nm1 and |q|=10.26nm1 where |c*|=2π/c is the reciprocal lattice vector. The scanning tunneling spectroscopy measurements, along with inelastic light (Raman) scattering measurements, show a CDW gap Δmax of approximately 0.37 eV. In addition to the CDW modulation, we observe an organization of the Te sheet atoms in an array of alternating V- and N-shaped groups along the CDW modulation, as predicted in the literature.

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  • Received 5 July 2016
  • Revised 8 September 2016

DOI:https://doi.org/10.1103/PhysRevB.94.165132

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

U. Ralević1,2, N. Lazarević1, A. Baum3, H.-M. Eiter3, R. Hackl3, P. Giraldo-Gallo4,6, I. R. Fisher5,6, C. Petrovic7, R. Gajić1, and Z. V. Popović1

  • 1Center for Solid State Physics and New Materials, Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia
  • 2Faculty of Electrical Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73b, 11120 Belgrade, Serbia
  • 3Walther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
  • 4Department of Physics, Stanford University, Stanford, California 94305-4045, USA
  • 5Department of Applied Physics, Stanford University, Stanford, California 94305-4045, USA
  • 6Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
  • 7Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA

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Issue

Vol. 94, Iss. 16 — 15 October 2016

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