Influence of domain walls in the incommensurate charge density wave state of Cu intercalated 1\(T\)-TiSe\(_2\)

We report a low-temperature scanning tunneling microscopy study of the charge density wave (CDW) order in 1\(T\)-TiSe\(_2\) and Cu\(_{0.08}\)TiSe\(_2\). In pristine 1\(T\)-TiSe\(_2\) we observe a long-range coherent commensurate CDW (C-CDW) order. In contrast, Cu\(_{0.08}\)TiSe\(_{2}\) displays an i...

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Bibliographic Details
Published inarXiv.org
Main Authors Yan, Shichao, Iaia, Davide, Morosan, Emilia, Fradkin, Eduardo, Abbamonte, Peter, Madhavan, Vidya
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 10.03.2017
Subjects
Charge density waves
Domain walls
Fermions
Fourier transforms
Magnetic fields
Superconductivity
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Summary:We report a low-temperature scanning tunneling microscopy study of the charge density wave (CDW) order in 1\(T\)-TiSe\(_2\) and Cu\(_{0.08}\)TiSe\(_2\). In pristine 1\(T\)-TiSe\(_2\) we observe a long-range coherent commensurate CDW (C-CDW) order. In contrast, Cu\(_{0.08}\)TiSe\(_{2}\) displays an incommensurate CDW (I-CDW) phase with localized C-CDW domains separated by domain walls. Density of states measurements indicate that the domain walls host an extra population of fermions near the Fermi level which may play a role in the emergence of superconductivity in this system. Fourier transform scanning tunneling spectroscopy studies suggest that the dominant mechanism for CDW formation in the I-CDW phase may be electron-phonon coupling.
ISSN:2331-8422
DOI:10.48550/arxiv.1609.08249