Yue Zheng and C H Woo 2009 Nanotechnology 20 075401 doi:10.1088/0957-4484/20/7/075401
Yue Zheng1 and C H Woo
Show affiliationsThe effect of an applied mechanical stress on the tunneling conductance of a ferroelectric tunnel barrier between substrates and dissimilar electrodes is studied. Using a thermodynamic model and taking into account polarization charge screening in the electrodes and the near-surface inhomogeneous polarization distribution, the tunneling conductance is calculated as a function of the applied stress. It is found that reversing an applied stress can also change the tunnel barrier sufficiently to produce an effect similar to the giant electro-resistance one due to polarization reversal, which is particularly significant near the stress-dependent paraelectric/ferroelectric phase transition. Indeed, the sensitivity is adequate for high-sensitivity electronic and mechanical sensors, memories and other nanodevices.
77.80.Bh Phase transitions and Curie point
77.84.Dy Niobates, titanates, tantalates, PZT ceramics, etc.
65.40.G- Other thermodynamical quantities
Condensed matter: electrical, magnetic and optical
Issue 7 (18 February 2009)
Received 23 October 2008, in final form 7 January 2009
Published 23 January 2009
Yue Zheng and C H Woo 2009 Nanotechnology 20 075401
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