Memory effect in MIS structures with amorphous silicon nanoparticles embedded in ultra thin SiOx matrix |
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Affiliation: | 1. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria;2. Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany |
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Abstract: | Metal//a-Si-/c-Si structures containing amorphous silicon nanoparticles (a-Si NPs) embedded in ultra thin matrix are fabricated by thermal evaporation of and sputtering of layers followed by thermal annealing at . A memory effect, due to charging of a-Si NPs in , is observed. The processes of NP charging and discharging are accomplished by applying pulses with alternative polarities. The observed shift of the flat band voltage of the high-frequency C–V curve caused by a voltage pulse of having duration of 1 s is more than 3 V. In addition, the structures show good retention characteristics which make them promising for application in non-volatile memory devices. |
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