Insights into Nanoscale Electrochemical Reduction in a Memristive Oxide: the Role of Three‐Phase Boundaries
Source abstract
Abstract
The nanoscale electro‐reduction in a memristive oxide is a highly relevant field for future non‐volatile memory materials. Photoemission electron microscopy is used to identify the conducting filaments and correlate them to structural features of the top electrode that indicate a critical role of the three phase boundary (electrode‐oxide‐ambient) for the electro‐chemical reduction. Based on simulated temperature profiles, the essential role of Joule heating through localized currents for electro‐reduction and morphology changes is demonstrated.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Memory and Neural Computing · Transition Metal Oxide Nanomaterials · Neural dynamics and brain function
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Peter Grünberg Institute, Research Center Jülich 52425 Jülich Germany
Research Center Jülich, JARA‐FIT 52425 Jülich Germany
University of Duisburg‐Essen, Faculty of Physics D‐47048 Duisburg Germany
Institute of Materials in Electrical Engineering and Information Technology II RWTH Aachen University D‐52056 Aachen Germany
References (33)
Show source-provided references
1. 10.1038/nmat202310.1038/nmat2023 ↗
2. 10.1002/adma.20090037510.1002/adma.200900375 ↗
3. 10.1063/1.369931510.1063/1.3699315 ↗
4. 10.1109/JPROC.2012.218877110.1109/JPROC.2012.2188771 ↗
5. 10.1038/nmat161410.1038/nmat1614 ↗
6. 10.1103/PhysRevB.80.21210310.1103/PhysRevB.80.212103 ↗
7. 10.1002/adma.20060291510.1002/adma.200602915 ↗
8. 10.1002/adma.20100187210.1002/adma.201001872 ↗
9. 10.1016/j.ultramic.2009.12.00210.1016/j.ultramic.2009.12.002 ↗
10. Under non‐resonant conditions δAu>δTi.
11. The brighter intensity in the SEM image is due to the increased amount of Au in the scattering cone of the primary electrons and the fact that for a heavy element such Au the secondary electron (SE) yield from backscattered electrons (BSE) is higher than that from primary electrons. In the resonant PEEM image there are no BSE due to the excitation with photons. The Au globules appear darker than the Au film for every excitation energy which is a consequence of the distortion of the electric field lines between globules and the immersion lens of the microscope.[33]
12. 10.1103/PhysRevB.41.92810.1103/PhysRevB.41.928 ↗
13. 10.1103/PhysRevB.44.541910.1103/PhysRevB.44.5419 ↗
14. This map of the local oxidation state of Ti was generated by averaging several images over the energy range between the peaks (457.7–458.6 eV) and displaying the image intensity using a color scheme. Note that the dark red region around the forming crater is covered by Au and therefore no Ti is visible.
15. 10.1021/cm203501u10.1021/cm203501u ↗
16. 10.1016/S0039-6028(00)00522-710.1016/S0039-6028(00)00522-7 ↗
17. 10.1021/ja312534910.1021/ja3125349 ↗
18. 10.1039/c3cp50272d10.1039/c3cp50272d ↗
19. Chang S. H. · Phys. Rev. Lett. · 2009 · 102 · 26801/1
20. 10.1002/adfm.20110111710.1002/adfm.201101117 ↗
21. 10.1109/TED.2008.201058310.1109/TED.2008.2010583 ↗
22. 10.1146/annurev.fluid.32.1.70910.1146/annurev.fluid.32.1.709 ↗
23. 10.1063/1.482243810.1063/1.4822438 ↗
24. 10.1063/1.472410810.1063/1.4724108 ↗
25. 10.1002/pssr.20070100310.1002/pssr.200701003 ↗
26. 10.1063/1.480436410.1063/1.4804364 ↗
27. 10.1088/0957-4484/22/25/25401510.1088/0957-4484/22/25/254015 ↗
28. 10.1038/nnano.2009.45610.1038/nnano.2009.456 ↗
29. 10.1016/j.mee.2007.04.04210.1016/j.mee.2007.04.042 ↗
30. 10.3762/bjnano.4.5510.3762/bjnano.4.55 ↗
31. 10.1088/0957-4484/20/48/48570110.1088/0957-4484/20/48/485701 ↗
32. 10.1002/sia.242410.1002/sia.2424 ↗
33. 10.1147/rd.444.053510.1147/rd.444.0535 ↗