Classification of Three-Level Random Telegraph Noise and Its Application in Accurate Extraction of Trap Profiles in Oxide-Based Resistive Switching Memory
In oxide-based resistive switching memory (OxRAM), due to the existence of oxygen ions, electron-induced random telegraph noise (e-RTN) and oxygen ion-induced RTN (GR-RTN) coexist and cannot be distinguished directly from the current levels in typical two-level RTN signals. Thus, the accurate extrac...
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Veröffentlicht in: | IEEE electron device letters 2018-09, Vol.39 (9), p.1302-1305 |
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Sprache: | eng |
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Zusammenfassung: | In oxide-based resistive switching memory (OxRAM), due to the existence of oxygen ions, electron-induced random telegraph noise (e-RTN) and oxygen ion-induced RTN (GR-RTN) coexist and cannot be distinguished directly from the current levels in typical two-level RTN signals. Thus, the accurate extraction of the trap location and energy level ( {X}_{T} , {E}_{T} ) based on the time constants from e-RTN is hindered, which impedes the further investigation of reliability. In this work, three-level RTN in TMO x -based OxRAM was investigated. GR-RTN and e-RTN were both observed and can be distinguished clearly by the comparison of the three discrete current levels. Also, especially for e-RTN, we discussed the bias dependency of time constants of the three-level e-RTN, and the vertical location and energy level of the trap corresponding to this three-level e-RTN were finally extracted. This extraction method after selecting e-RTN from all RTN signals provides a more accurate characterization result of the trap and will be helpful to the investigation of the reliability in OxRAM devices. |
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ISSN: | 0741-3106 1558-0563 |
DOI: | 10.1109/LED.2018.2858245 |