通过在固体溶液中进行带间距调整来增强电阻记忆窗口 (Cr1-V) O3
Michael Rodriguez-Fano1, Mohamad Haydoura1, Julien Tranchant1
1Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS, F-44000 Nantes, France.
ACS applied materials & interfaces
|November 14, 2023
概括
这项研究探讨了V替代的Cr2O3用于高级非易失性记忆. 在 (Cr1-xVx) 2O3 固体溶液中调整 V 含量显著提高了内存窗口性能,证实了相关绝缘体内存应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 固态化学 固态化学
背景情况:
- 非易失性内存技术面临着局限性.
- 相关绝缘体通过绝缘体到金属的过渡提供了有希望的替代品.
- 之前的研究集中在具有有限记忆窗口的窄间隙化合物上.
研究的目的:
- 在增强记忆的应用中研究V替代的Cr2O3 ((Cr1-xVx) 2O3).
- 探索化学组成的全部范围 (0 < x < 1).
- 评估薄膜,单晶和多晶粉末的性能.
主要方法:
- 在组成范围内的 (Cr1-xVx) 2O3化合物的合成.
- 使用X射线衍射和拉曼散射进行表征.
- 测量光波段间隙和电阻力.
- 制造和测试用于电阻切换的金属绝缘体金属 (MIM) 装置.
主要成果:
- 所有的化合物形成了一种固体溶液,具有一致的晶体结构.
- 光带间隙从3 eV (Cr2O3) 减少到0 eV (V2O3).
- 电阻随着V含量增加而下降了近5个数量级.
- 观察到可逆电阻切换,50nm (Cr0.30V0.70) 2O3膜显示高耐久性 (1000周期) 和内存窗口大于 (Cr0.05V0.95) 2O3.3.3的3个数量级.
结论:
- 在 (Cr1-xVx) 2O3 中调整 V 内容,可以控制带间隙和电阻.
- 这种可调节性使得各种各样的内存窗口成为可能.
- 相关绝缘体,特别是 (Cr1-xVx) 2O3,显示出下一代非挥发性存储器设备的巨大潜力.
相关概念视频
Band Theory
15.2K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
15.2K
Biasing of Metal-Semiconductor Junctions
261
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
261


