Journal article
Giant enhancement in the ferroelectric field effect using a polarization gradient
Applied physics letters, v 107(16), p162901
19 Oct 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Coupling of switchable ferroelectric polarization with the carrier transport in an adjacent semiconductor enables a robust, non-volatile manipulation of the conductance in a host of low-dimensional systems, including the two-dimensional electron liquid that forms at the LaAlO3 (LAO)-SrTiO3 (STO) interface. However, strength of the gate-channel coupling is relatively weak, limited in part by the electrostatic potential difference across a ferroelectric gate. Here, through application of phenomenological Landau-Ginzburg-Devonshire theory and self-consistent Poisson-Schrodinger model calculations, we show how compositional grading of PbZr1-xTixO3 ferroelectric gates enables a more than twenty-five-fold increase in the LAO/STO channel conductance on/off ratios. Incorporation of polarization gradients in ferroelectric gates can enable breakthrough performance of ferroelectric non-volatile memories. (C) 2015 AIP Publishing LLC.
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Details
- Title
- Giant enhancement in the ferroelectric field effect using a polarization gradient
- Creators
- Zongquan Gu - Drexel UniversityMohammad A. Islam - Drexel UniversityJonathan E. Spanier - Drexel University
- Publication Details
- Applied physics letters, v 107(16), p162901
- Publisher
- American Institute of Physics
- Number of pages
- 5
- Grant note
- Nanoscale Research Initiative (NRI) of the Semiconductor Research Corporation (SRC) DMR 1124696 / National Science Foundation (NSF) 1124696 / Division Of Materials Research; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000363781900019
- Scopus ID
- 2-s2.0-84945156839
- Other Identifier
- 991019168291304721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Physics, Applied