Ultrafast manipulation of mirror domain walls in a charge density wave
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eaau5501.full.pdf
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9.45 MB
Format
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Checksum (MD5)
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Author(s)
Shen, Xiaozhe
Marks, Carolyn
Weathersby, Stephen
Li, Renkai
Yang, Jie
Wang, Xijie
Zong, Guo
Kogar, Anshul
Ye, Linda
Chowdhury, Debanjan
Date Issued
October 2018
Journal
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Zong, Alfred et al. “Ultrafast Manipulation of Mirror Domain Walls in a Charge Density Wave.” Science Advances 4, 10 (October 2018): eaau5501 © 2018 The Authors
Version
Final published version
Abstract
Domain walls (DWs) are singularities in an ordered medium that often host exotic phenomena such as charge ordering, insulator-metal transition, or superconductivity. The ability to locally write and erase DWs is highly desirable, as it allows one to design material functionality by patterning DWs in specific configurations. We demonstrate such capability at room temperature in a charge density wave (CDW), a macroscopic condensate of electrons and phonons, in ultrathin 1T-TaS₂. A single femtosecond light pulse is shown to locally inject or remove mirror DWs in the CDW condensate, with probabilities tunable by pulse energy and temperature. Using time-resolved electron diffraction, we are able to simultaneously track anti-synchronized CDW amplitude oscillations from both the lattice and the condensate, where photoinjected DWs lead to a red-shifted frequency. Our demonstration of reversible DW manipulation may pave new ways for engineering correlated material systems with light.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1126/sciadv.aau5501
