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Excellent State Stability of Cu/SiC/Pt Programmable Metallization Cells for Nonvolatile Memory Applications

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9 Author(s)
Wootae Lee ; Sch. of Mater. Sci. & Eng., Gwangju Inst. of Sci. & Technol., Gwangju, South Korea ; Jubong Park ; Myungwoo Son ; Joonmyoung Lee
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We have investigated silicon carbide (SiC) as a new programmable metallization cell material for nonvolatile memory applications. Our Cu/SiC/Pt devices showed bipolar resistive switching; the conduction mechanisms can be explained by the formation of a Cu filament and Poole-Frenkel emission in the low-resistance and high-resistance states, respectively. In particular, our devices showed excellent state stability, e.g., nondestructive readout at various stress voltages, excellent retention characteristics at 150°C for 104 s, and stable memory operation at high ambient temperature. We attribute this state stability to the SiC's high chemical stability and the ability to act as a Cu diffusion barrier.

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Electron Device Letters, IEEE  (Volume:32 ,  Issue: 5 )