Ultrafast manipulation of mirror domain walls in a charge density wave
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...
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Published in | Science advances Vol. 4; no. 10; p. eaau5501 |
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Main Authors | , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
AAAS
19.10.2018
American Association for the Advancement of Science |
Subjects | |
Online Access | Get full text |
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Summary: | 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 1
-TaS
. 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. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 AC02-76SF00515; AC02-05CH11231; DMR-14-19807; GBMF4540; GBMF3848; GBMF4303 National Science Foundation (NSF) USDOE Office of Science (SC), Basic Energy Sciences (BES) Gordon and Betty Moore Foundation (United States) These authors contributed equally to this work. Present address: Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, USA. Present address: Center for Free-Electron Laser Science, DESY, Notkestraße 85, 22607 Hamburg, Germany. |
ISSN: | 2375-2548 2375-2548 |
DOI: | 10.1126/sciadv.aau5501 |