Conducting mechanisms of forming-free TiW/Cu2O/Cu memristive devices
Conducting mechanisms of forming-free TiW/Cu2O/Cu memristive devices
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免成型TiW/Cu2O/Cu忆阻器件的导电机制
DOI:
10.1063/1.4928979
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发表时间:
2015-08
影响因子:
4
通讯作者:
Miao X. S.
中科院分区:
文献类型:
--
作者:
Yan P.;Li Y.;Hui Y. J.;Zhong S. J.;Zhou Y. X.;Xu L.;Liu N.;Qian H.;Sun H. J.;Miao X. S.
P-type Cu2O is a promising CMOS-compatible candidate to fabricate memristive devices for next-generation memory, logic and neuromorphic computing. In this letter, the microscopic switching and conducting mechanisms in TiW/Cu2O/Cu memristive devices have been thoroughly investigated. The bipolar resistive switching behaviors without an electro-forming process are ascribed to the formation and rupture of the conducting filaments composed of copper vacancies. In the low resistive state, the transport of electrons in the filaments follows Mott's variable range hopping theory. When the devices switch back to high resistive state, the coexistence of Schottky emission at the Cu/Cu2O interface and electron hopping between the residual filaments is found to dominate the conducting process. Our results will contribute to the further understanding and optimization of p-type memristive materials.
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