A5092777423- Ferroelectric and Piezoelectric Materials
- Semiconductor materials and devices
- Advanced Memory and Neural Computing
- Photonic Crystals and Applications
- Electronic and Structural Properties of Oxides
- Advanced Surface Polishing Techniques
- Advanced ceramic materials synthesis
- Dielectric properties of ceramics
- Dielectric materials and actuators
Sandia National Laboratories
2023-2025
Granular metals, consisting of nanoscale conducting and insulating regions, have been studied for more than 50 years fundamental applied research. metals exhibit non-linear conductivity vs frequency behavior, consistent with the universal power law response, recently suggested high-pass filter applications. Here, we report that cobalt–silicon nitride (Co–SiNx) granular optimized sputter conditions post-growth annealing an exceptional 109 increase in at 1 MHz compared to DC conductivity. The...
Granular metals (GMs), consisting of metal nanoparticles separated by an insulating matrix, frequently serve as a platform for fundamental electron transport studies. However, few technologically mature devices incorporating GMs have been realized, in large part because intrinsic defects (e.g., trapping sites and metal/insulator interfacial defects) impede transport, particularly that do not contain noble metals. Here, we demonstrate such can be minimized molybdenum–silicon nitride (Mo–SiNx)...
Abstract Understanding and controlling nanoscale interface phenomena, such as band bending secondary phase formation, is crucial for electronic device optimization. In granular metal (GM) studies, where nanoparticles are embedded in an insulating matrix, the importance of phenomena frequently neglected. We demonstrate that GMs can serve exemplar system evaluating role phases at interfaces through a combination x-ray photoemission spectroscopy (XPS) electrical transport studies. investigated...