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000827049 1001_ $$0P:(DE-Juel1)145413$$aDuchamp, Martial$$b0
000827049 245__ $$aIn situ transmission electron microscopy of resistive switching in thin  silicon oxide layers
000827049 260__ $$aBudapest$$bAkadémiai Kiadó$$c2016
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000827049 520__ $$aSilicon oxide-based resistive switching devices show great potential for applications in nonvolatile random access memories. We expose a device to voltages above hard breakdown and show that hard oxide breakdown results in mixing of the SiOx layer and the TiN lower contact layers. We switch a similar device at sub-breakdown fields in situ in the transmission electron microscope (TEM) using a movable probe and study the diffusion mechanism that leads to resistance switching. By recording bright-field (BF) TEM movies while switching the device, we observe the creation of a filament that is correlated with a change in conductivity of the SiOx layer. We also examine a device prepared on a microfabricated chip and show that variations in electrostatic potential in the SiOx layer can be recorded using off-axis electron holography as the sample is switched in situ in the TEM. Taken together, the visualization of compositional changes in ex situ stressed samples and the simultaneous observation of BF TEM contrast variations, a conductivity increase, and a potential drop across the dielectric layer in in situ switched devices allow us to conclude that nucleation of the electroforming—switching process starts at the interface between the SiOx layer and the lower contact.
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000827049 7001_ $$0P:(DE-Juel1)159136$$aMigunov, Vadim$$b1
000827049 7001_ $$0P:(DE-Juel1)157886$$aTavabi, Amir Hossein$$b2
000827049 7001_ $$0P:(DE-HGF)0$$aMehonic, A.$$b3
000827049 7001_ $$0P:(DE-HGF)0$$aBuckwell, M.$$b4
000827049 7001_ $$0P:(DE-HGF)0$$aMunde, M.$$b5
000827049 7001_ $$0P:(DE-HGF)0$$aKenyon, A. J.$$b6
000827049 7001_ $$0P:(DE-Juel1)144121$$aDunin-Borkowski, Rafal$$b7$$eCorresponding author
000827049 773__ $$0PERI:(DE-600)2882657-7$$a10.1556/2051.2016.00036$$gVol. 1, no. 1, p. 27 - 33$$n1$$p27 - 33$$tResolution and discovery$$v1$$x2498-8707$$y2016
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