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| Home > Publications database > Improved Switching Stability and the Effect of an Internal Series Resistor in HfO 2 /TiO x Bilayer ReRAM Cells > print |
| 001 | 851648 | ||
| 005 | 20210129234952.0 | ||
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| 100 | 1 | _ | |a Hardtdegen, Alexander |0 P:(DE-Juel1)165704 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Improved Switching Stability and the Effect of an Internal Series Resistor in HfO 2 /TiO x Bilayer ReRAM Cells |
| 260 | _ | _ | |a New York, NY |c 2018 |b IEEE |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Bipolar redox-based resistive random-access memory cells are intensively studied for new storage class memory and beyond von Neumann computing applications. However, the considerable variability of the resistance values in ON and OFF state as well as of the SET voltage remains challenging. In this paper, we discuss the physical origin of the significant reduction in the switching variability of HfO 2 -based devices achieved by the insertion of a thin TiOx layer between the HfO 2 layer and the oxygen exchange metal layer. Typically, HfO 2 single layer cells exhibit an abrupt SET process, which is difficult to control. In contrast, self-compliance effects in the HfO 2 /TiO x bilayer devices lead to an increased stability of SET voltages and OFF-state resistances. The SET process is gradual and the RESET becomes abrupt for higher switching currents. Comparison of the experimental data with simulation results achieved from a physics-based compact model for the full description of the switching behavior of the single layer and bilayer devices clearly reveal three major effects. The TiO x layer affects the temperature distribution during switching (by modifying the heat dissipation), forms an additional series resistance and changes the current conduction mechanism in the OFF state of the bilayer device compared to the single layer device. |
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| 700 | 1 | _ | |a La Torre, Camilla |0 0000-0003-1874-9864 |b 1 |e Corresponding author |
| 700 | 1 | _ | |a Cuppers, Felix |0 P:(DE-Juel1)173924 |b 2 |
| 700 | 1 | _ | |a Menzel, Stephan |0 P:(DE-Juel1)158062 |b 3 |
| 700 | 1 | _ | |a Waser, R. |0 P:(DE-Juel1)131022 |b 4 |
| 700 | 1 | _ | |a Hoffmann-Eifert, Susanne |0 P:(DE-Juel1)130717 |b 5 |
| 773 | _ | _ | |a 10.1109/TED.2018.2849872 |g Vol. 65, no. 8, p. 3229 - 3236 |0 PERI:(DE-600)2028088-9 |n 8 |p 3229 - 3236 |t IEEE transactions on electron devices |v 65 |y 2018 |x 1557-9646 |
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