Journal article
Modified Schottky emission to explain thickness dependence and slow depolarization in BaTiO3 nanowires
Physical review. B, v 91(24)
24 Jun 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We investigate the origin of the depolarization rates in ultrathin adsorbate-stabilized ferroelectric wires. By applying density functional theory calculations and analytic modeling, we demonstrate that the depolarization results from the leakage of charges stored at the surface adsorbates, which play an important role in the polarization stabilization. The depolarization speed varies with thickness and temperature, following several complex trends. A comprehensive physical model is presented, in which quantum tunneling, Schottky emission, and temperature-dependent electron mobility are taken into consideration. This model simulates experimental results, validating the physical mechanism. We also expect that this improved tunneling-Schottky emission model could be applied to predict the retention time of polarization and the leakage current for various ferroelectric materials with different thicknesses and temperatures.
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Details
- Title
- Modified Schottky emission to explain thickness dependence and slow depolarization in BaTiO3 nanowires
- Creators
- Y. Qi - University of PennsylvaniaJ. M. P. Martirez - University of PennsylvaniaWissam A. Saidi - University of PittsburghJ. J. Urban - Lawrence Berkeley National LaboratoryW. S. Yun - Sungkyunkwan UniversityJ. E. Spanier - Drexel UniversityA. M. Rappe - University of Pennsylvania
- Publication Details
- Physical review. B, v 91(24)
- Publisher
- Amer Physical Soc
- Number of pages
- 9
- Grant note
- N00014-12-1-1033 / Office of Naval Research DE-FG02-07ER15920 / Department of Energy Office of Basic Energy Sciences; United States Department of Energy (DOE) NRF-2012-0009565 / National Research Foundation of Korea CMMI1334241; DMR1124696 / National Science Foundation; National Science Foundation (NSF) DE-AC02-05CH11231 / Office of Science, Office of Basic Energy Sciences, at the U.S. Department of Energy (DOE); United States Department of Energy (DOE) Molecular Foundry
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000356792500005
- Scopus ID
- 2-s2.0-84936797902
- Other Identifier
- 991019169670904721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter