在磁电 SrRuO3/BaTiO3/SrTiO3/SrRuO3接口中的电子传输的第一原则
Nicolae Filipoiu1,2, Neculai Plugaru3, Titus Sandu3
1Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele 77126, Ilfov, Romania.
Nanotechnology
|November 22, 2024
概括
具有可调节的铁电道连接的磁电异构结构显示出低功耗电子的前景. 该SrRuO3/BaTiO3/mSrTiO3系统表现出显著的电阻和磁阻,特别是对于m=2.2.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
背景情况:
- 基于SrRuO3/BaTiO3/SrTiO3等矿的全氧化铁电道连接 (FTJ) 对高密度,低功耗应用很有兴趣.
- 它们的可调节的传输特性和原子尺度设备缩放的潜力使它们对下一代电子产品具有吸引力.
研究的目的:
- 研究磁电 SrRuO3/BaTiO3/mSrTiO3/SrRuO3 接口的电子结构和道运输特性.
- 探索 RuO6 八面体倾斜和磁性 SrRuO3 电极对设备特性的影响.
主要方法:
- 第一原则计算.第一原则计算.
- 非平衡的格林函数 (NEGF) 形式主义.
主要成果:
- 带对齐预测偏振依赖的肖特基或欧姆接触m(STO) = 0,只有肖特基接触m(STO) = 2和4.
- 道电阻 (TER) 和道磁阻 (TMR) 的比率在0K和300K时被评估.
- m(STO) = 2异构表现出最显著的磁电响应,并存在巨大的TER和TMR效应.
- 介面磁电合不足以通过偏振切换控制TMR,尽管有强大的SrRuO3铁磁性.
结论:
- 该SrRuO3 / BaTiO3 / mSrTiO3系统显示出显著的磁电合和可调节的传输特性.
- 对于需要同时产生电阻和磁阻效应的应用,m(STO) = 2接口尤其具有前景.
- 可能需要进一步的研究来增强极化控制磁电阻的界面磁电合.
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