坚固的金属和半导体相位过渡memristor使用Ag间隔过渡金属二甲基化物
Whan Kyun Kim1,2,3, Ga Young Cho1, Thi Thanh Huong Vu1
1Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Advanced materials (Deerfield Beach, Fla.)
|October 28, 2025
概括
在二化物 (MoTe2) 中的银离子间隙使得稳健的相位过渡记忆器 (PTMEM) 操作成为可能,克服了离子的局限性. 这种Ag+MoTe2 PTMEM在高级内存应用中表现出卓越的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 固态电子 固态电子
背景情况:
- 基于过渡金属二甲基化物 (TMD) 的相过渡记忆器 (PTMEM) 对神经形态计算具有前景.
- 在TMD中金属离子 (Li+) 间隙提供了良好的电特性,但具有较差的离子稳定性,限制了设备的性能.
研究的目的:
- 为了研究MoTe2中合的银离子 (Ag+) 对于稳健的PTMEM操作的潜力.
- 为了比较Ag+插入的MoTe2与Li+插入的对应物之间的记忆性能.
主要方法:
- 制造和表征Ag+间隔的MoTe2 PTMEMs. 制造和表征Ag+间隔的MoTe2 PTMEMs.
- 使用传输电子显微镜,X射线光电子光谱和拉曼映射来确认相位过渡.
- 电气测试用于评估记忆特性,包括开/关比,保留和非线性.
主要成果:
- 通过Ag+离子迁移诱导的MoTe2中可逆的2H-1T/1T'相过渡得到证实.
- 与基于Li+的设备相比,Ag+-MoTe2 PTMEMs实现了高开/关比 (200,000),显著提高了保留率,并降低了非线性.
- 记忆机制从兴奋剂转移到相位过渡,增加了Ag间歇时间.
结论:
- 基于Ag+的MoTe2 PTMEM提供了比基于Li+的PTMEM更高的稳定性和性能.
- 在MNIST识别中,Ag+-MoTe2 PTMEM实现了高精度 (91.7%),证明了神经网络应用的潜力.
- MoTe2具有较低的相位过渡屏障,因此非常适合Ag+诱导的PTMEMs.
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