Charge density wave modulation and gap measurements in CeTe$_3$
| Autor: | Paula Giraldo-Gallo, Zoran B. Popović, Andreas Baum, H.-M. Eiter, Ian R. Fisher, Uroš Ralević, Cedomir Petrovic, Nenad Lazarević, Radoš Gajić, R. Hackl |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Condensed Matter - Materials Science Condensed matter physics Scattering Scanning tunneling spectroscopy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences law.invention Reciprocal lattice symbols.namesake Modulation law 0103 physical sciences symbols Atomic physics Scanning tunneling microscope 010306 general physics 0210 nano-technology Raman spectroscopy Charge density wave |
| DOI: | 10.48550/arxiv.1606.07766 |
| Popis: | We present a study of charge density wave (CDW) ordering in ${\mathrm{CeTe}}_{3}$ 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 $|{\mathbf{c}}^{*}\ensuremath{-}\mathbf{q}|=4.19\phantom{\rule{0.28em}{0ex}}{\mathrm{nm}}^{\ensuremath{-}1}$ and $|\mathbf{q}|=10.26\phantom{\rule{0.28em}{0ex}}{\mathrm{nm}}^{\ensuremath{-}1}$ where $|{\mathbf{c}}^{*}|=2\ensuremath{\pi}/c$ is the reciprocal lattice vector. The scanning tunneling spectroscopy measurements, along with inelastic light (Raman) scattering measurements, show a CDW gap ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{max}}$ 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. |
| Databáze: | OpenAIRE |
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