Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31034
Title: Ferroelectricity in ultrathin asymmetric ferroelectric tunnel junctions : vanishing critical thickness
Authors: Zheng, Y
Chen, WJ
Woo, CH 
Wang, B
Issue Date: 2011
Source: Journal of physics. D, Applied physics, 2011, v. 44, no. 9, 95401
Abstract: Using a modified thermodynamic model, the critical thickness of ultrathin asymmetric ferroelectric tunnel junctions (A-FTJs) is investigated considering the effects of size, asymmetric interfaces and electrodes on the stability and magnitude of two spontaneous polarization states. The results illustrate the important behaviour of vanishing critical thickness for one polarization state due to the existence of a built-in electric field induced by the asymmetric electrodes. The critical thickness for another polarization state exists and can be controlled by adjusting the properties of the asymmetric electrodes. Our results also indicate that other properties of the A-FTJ should be tunable with the design of its asymmetric electrodes.
Publisher: Institute of Physics Publishing
Journal: Journal of physics. D, Applied physics 
ISSN: 0022-3727
EISSN: 1361-6463
DOI: 10.1088/0022-3727/44/9/095401
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