在铁电门的Mott晶体管中记录高室温电阻切换,通过接口充电工程解锁
Yifei Hao1, Xuegang Chen1, Le Zhang1
1Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE, 68588-0299, USA.
Nature communications
|December 12, 2023
概括
铁电门式Mott晶体管显示出对节能电子产品的承诺. 一个新的复合道在室温下实现了创纪录的38.440%的电阻切换比率,克服了以前的限制.
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
- 设备物理 设备物理
背景情况:
- 铁电门式Mott晶体管由于尺寸和功率缩放,为后摩尔定律计算提供了潜力.
- 由于载体密度高,在Mott通道中实现显著的场效应调制具有挑战性.
- 之前对单层通道的优化只产生了适度的室温电阻切换.
研究的目的:
- 开发一个具有增强非挥发性电阻开关的Mott晶体管.
- 为了克服铁电门中载体密度和去极化效应的局限性.
- 探索新的复杂氧化物异界面,以提高设备性能.
主要方法:
- 制造了一种原型的Mott晶体管,具有铁电门 (PbZr0.2Ti0.8O3) 和一个复合通道 (RNiO3/La0.67Sr0.33MnO3).
- 使用超薄的La0.67Sr0.33MnO3缓冲层来定制载体密度并减少去极化.
- 运用第一原则计算来证实接口负荷转移效应.
主要成果:
- 在300K时实现了创纪录的非挥发性电阻切换比率38.440%,达到300K.
- 证明了La0.67Sr0.33MnO3缓冲层通过接口电荷转移有效地修改了RNiO3载体配置.
- 展示了缓冲层在减少铁电门去极化效应中的作用.
结论:
- 该研究提出了一个有效的材料策略,用于设计复杂的氧化物异面接口.
- 在场选和铁电去极化中利用竞争性电荷效应是提高设备性能的关键.
- 这种方法为高效的Mott晶体管为内存和逻辑应用铺平了道路.
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