Distinction between pristine and disorder-perturbed charge density waves in ZrTe3

Li Yue, Shangjie Xue, Jiarui Li, Wen Hu, Andi Barbour, Feipeng Zheng, Lichen Wang, Ji Feng, Stuart B. Wilkins, Claudio Mazzoli, Riccardo Comin () and Yuan Li ()
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Li Yue: Peking University
Shangjie Xue: Massachusetts Institute of Technology
Jiarui Li: Massachusetts Institute of Technology
Wen Hu: National Synchrotron Light Source II, Brookhaven National Laboratory
Andi Barbour: National Synchrotron Light Source II, Brookhaven National Laboratory
Feipeng Zheng: Jinan University
Lichen Wang: Peking University
Ji Feng: Peking University
Stuart B. Wilkins: National Synchrotron Light Source II, Brookhaven National Laboratory
Claudio Mazzoli: National Synchrotron Light Source II, Brookhaven National Laboratory
Riccardo Comin: Massachusetts Institute of Technology
Yuan Li: Peking University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Charge density waves (CDWs) in the cuprate high-temperature superconductors have evoked much interest, yet their typical short-range nature has raised questions regarding the role of disorder. Here we report a resonant X-ray diffraction study of ZrTe$${}_{3}$$3, a model CDW system, with focus on the influence of disorder. Near the CDW transition temperature, we observe two independent signals that arise concomitantly, only to become clearly separated in momentum while developing very different correlation lengths in the well-ordered state that is reached at a distinctly lower temperature. Anomalously slow dynamics of mesoscopic charge domains are further found near the transition temperature, in spite of the expected strong thermal fluctuations. Our observations signify the presence of distinct experimental fingerprints of pristine and disorder-perturbed CDWs. We discuss the latter also in the context of Friedel oscillations, which we argue might promote CDW formation via a self-amplifying process.

Date: 2020
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DOI: 10.1038/s41467-019-13813-y

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