Light-activated Gigahertz Ferroelectric Domain Dynamics
Journal Article
·
· Physical Review Letters
- Pennsylvania State Univ., University Park, PA (United States). Materials Research Inst. and Dept. of Materials Science and Engineering
- Pennsylvania State Univ., University Park, PA (United States). Materials Research Inst. and Dept. of Materials Science and Engineering; Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Pennsylvania State Univ., University Park, PA (United States). Materials Research Inst. and Dept. of Materials Science and Engineering; Pennsylvania State Univ., University Park, PA (United States). Dept. of Physics
Using time- and spatially-resolved hard X-ray diffraction microscopy, the striking structural and electrical dynamics upon optical excitation of a single crystal of BaTiO3 are simultaneously captured on sub-nanoseconds and nanoscale within individual ferroelectric domains and across walls. A large emergent photo-induced electric field of up to 20 million volts per meter is discovered in a surface layer of the crystal, which then drives polarization and lattice dynamics that are dramatically distinct in a surface layer versus bulk regions. A dynamical phase-field modeling (DPFM) method is developed that reveals the microscopic origin of these dynamics, leading to GHz polarization and elastic waves travelling in the crystal with sonic speeds and spatially varying frequencies. The advance of spatiotemporal imaging and dynamical modeling tools open opportunities of disentangling ultrafast processes in complex mesoscale structures such as ferroelectric domains
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-06CH11357; SC0012375
- OSTI ID:
- 1426228
- Alternate ID(s):
- OSTI ID: 1422652
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Vol. 120; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Unexpected Giant Microwave Conductivity in a Nominally Silent BiFeO 3 Domain Wall
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journal | January 2020 |
Electric-Field-Driven Nanosecond Ferroelastic-Domain Switching Dynamics in Epitaxial Pb ( Zr , Ti ) O 3 Film
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journal | November 2019 |
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