Nanoscale-femtosecond dielectric response of Mott insulators captured by two-color near-field ultrafast electron microscopy
Abstract
Characterizing and controlling the out-of-equilibrium state of nanostructured Mott insulators hold great promises for emerging quantum technologies while providing an exciting playground for investigating fundamental physics of strongly-correlated systems. Here, we use two-color near-field ultrafast electron microscopy to photo-induce the insulator-to-metal transition in a single VO2 nanowire and probe the ensuing electronic dynamics with combined nanometer-femtosecond resolution (10–21m • s). We take advantage of a femtosecond temporal gating of the electron pulse mediated by an infrared laser pulse, and exploit the sensitivity of inelastic electron-light scattering to changes in the material dielectric function. By spatially mapping the near-field dynamics of an individual nanowire of VO2, we observe that ultrafast photo-doping drives the system into a metallic state on a timescale of ~150 fs without yet perturbing the crystalline lattice. Due to the high versatility and sensitivity of the electron probe, our method would allow capturing the electronic dynamics of a wide range of nanoscale materials with ultimate spatiotemporal resolution.
- Authors:
-
- Nankai Univ., Tianjin (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Ecole Polytechnique Federale Lausanne (Switzlerland); Univ. of Geneva (Switzerland)
- Ecole Polytechnique Federale Lausanne (Switzlerland)
- Univ. of California, Berkeley, CA (United States)
- Univ. of Milano-Bicocca, Milano (Italy)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Swiss Federal Institute of Technology Lausanne; Swiss National Science Foundation (SNSF); National Science Foundation (NSF)
- OSTI Identifier:
- 1763998
- Report Number(s):
- BNL-220951-2021-JAAM
Journal ID: ISSN 2041-1723; TRN: US2206126
- Grant/Contract Number:
- SC0012704; 665667; 200020-179157; DMR-1608899
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Fu, Xuewen, Barantani, Francesco, Gargiulo, Simone, Madan, Ivan, Berruto, Gabriele, LaGrange, Thomas, Jin, Lei, Wu, Junqiao, Vanacore, Giovanni Maria, Carbone, Fabrizio, and Zhu, Yimei. Nanoscale-femtosecond dielectric response of Mott insulators captured by two-color near-field ultrafast electron microscopy. United States: N. p., 2020.
Web. doi:10.1038/s41467-020-19636-6.
Fu, Xuewen, Barantani, Francesco, Gargiulo, Simone, Madan, Ivan, Berruto, Gabriele, LaGrange, Thomas, Jin, Lei, Wu, Junqiao, Vanacore, Giovanni Maria, Carbone, Fabrizio, & Zhu, Yimei. Nanoscale-femtosecond dielectric response of Mott insulators captured by two-color near-field ultrafast electron microscopy. United States. https://doi.org/10.1038/s41467-020-19636-6
Fu, Xuewen, Barantani, Francesco, Gargiulo, Simone, Madan, Ivan, Berruto, Gabriele, LaGrange, Thomas, Jin, Lei, Wu, Junqiao, Vanacore, Giovanni Maria, Carbone, Fabrizio, and Zhu, Yimei. Fri .
"Nanoscale-femtosecond dielectric response of Mott insulators captured by two-color near-field ultrafast electron microscopy". United States. https://doi.org/10.1038/s41467-020-19636-6. https://www.osti.gov/servlets/purl/1763998.
@article{osti_1763998,
title = {Nanoscale-femtosecond dielectric response of Mott insulators captured by two-color near-field ultrafast electron microscopy},
author = {Fu, Xuewen and Barantani, Francesco and Gargiulo, Simone and Madan, Ivan and Berruto, Gabriele and LaGrange, Thomas and Jin, Lei and Wu, Junqiao and Vanacore, Giovanni Maria and Carbone, Fabrizio and Zhu, Yimei},
abstractNote = {Characterizing and controlling the out-of-equilibrium state of nanostructured Mott insulators hold great promises for emerging quantum technologies while providing an exciting playground for investigating fundamental physics of strongly-correlated systems. Here, we use two-color near-field ultrafast electron microscopy to photo-induce the insulator-to-metal transition in a single VO2 nanowire and probe the ensuing electronic dynamics with combined nanometer-femtosecond resolution (10–21m • s). We take advantage of a femtosecond temporal gating of the electron pulse mediated by an infrared laser pulse, and exploit the sensitivity of inelastic electron-light scattering to changes in the material dielectric function. By spatially mapping the near-field dynamics of an individual nanowire of VO2, we observe that ultrafast photo-doping drives the system into a metallic state on a timescale of ~150 fs without yet perturbing the crystalline lattice. Due to the high versatility and sensitivity of the electron probe, our method would allow capturing the electronic dynamics of a wide range of nanoscale materials with ultimate spatiotemporal resolution.},
doi = {10.1038/s41467-020-19636-6},
journal = {Nature Communications},
number = 1,
volume = 11,
place = {United States},
year = {Fri Nov 13 00:00:00 EST 2020},
month = {Fri Nov 13 00:00:00 EST 2020}
}
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