TY  - JOUR
AU  - Baeumer, Christoph
AU  - Valenta, Richard
AU  - Schmitz, Christoph
AU  - Locatelli, Andrea
AU  - Menteş, Tevfik Onur
AU  - Rogers, Steven P.
AU  - Sala, Alessandro
AU  - Raab, Nicolas
AU  - Nemsak, Slavomir
AU  - Shim, Moonsub
AU  - Schneider, Claus M.
AU  - Menzel, Stephan
AU  - Waser, R.
AU  - Dittmann, Regina
TI  - Subfilamentary Networks Cause Cycle-to-Cycle Variability in Memristive Devices
JO  - ACS nano
VL  - 11
IS  - 7
SN  - 1936-086X
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2017-06168
SP  - 6921 - 6929
PY  - 2017
AB  - A major obstacle for the implementation of redox-based memristive memory or logic technology is the large cycle-to-cycle and device-to-device variability. Here, we use spectromicroscopic photoemission threshold analysis and operando XAS analysis to experimentally investigate the microscopic origin of the variability. We find that some devices exhibit variations in the shape of the conductive filament or in the oxygen vacancy distribution at and around the filament. In other cases, even the location of the active filament changes from one cycle to the next. We propose that both effects originate from the coexistence of multiple (sub)filaments and that the active, current-carrying filament may change from cycle to cycle. These findings account for the observed variability in device performance and represent the scientific basis, rather than prior purely empirical engineering approaches, for developing stable memristive devices.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000406649700040
DO  - DOI:10.1021/acsnano.7b02113
UR  - https://juser.fz-juelich.de/record/837189
ER  -