使用可见光调节自旋极化2D电子系统的磁传输特性,使用可见光
Maria D'Antuono1,2, Yu Chen2, Roberta Caruso1,2,3
1Department of Physics, University of Naples Federico II, via Cinthia, 80126, Naples, Italy.
Scientific reports
|June 21, 2023
概括
可见光可以调整自旋极化二维电子系统 (2DES) 的电子特性. 这项研究表明,发光二极管 (LED) 可以在这些氧化物接口中可控地改变导电性和磁性行为.
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
- 氧化物电子产品 氧化物电子
背景情况:
- 在氧化物接口上的二维电子系统 (2DES) 具有独特的电子和磁性.
- 控制这些系统的基本状态对于开发新型电子设备至关重要.
- 外部刺激,如光,提供一种非侵入性的方法来调整材料特性.
研究的目的:
- 为了研究可见光对自旋极化2DES的低温电子特性的影响.
- 探索发光二极管 (LED) 调节导电性和磁性行为的潜力.
- 了解氧化物2DES.中因光引起的变化的基本机制.
主要方法:
- 在LaAlO[公式:见文本],EuTiO[公式:见文本]和SrTiO[公式:见文本]的接口上制造2DES.
- 用在各种可见光波长发射的LED对2DES进行辐射.
- 在低温下测量纵向和横向导电性,霍尔效应和磁导.
主要成果:
- 可见光导致纵向和横向导电性的强烈,持久的调节.
- 霍尔效应测量显示,3d带的非挥发性电子填充和增强异常的霍尔效应.
- 抑制弱抗局部化校正与增强的旋转极化和铁磁性质相关.
结论:
- 用LED诱导的光是控制人工旋极化氧化物2DES的基本状态特性的一种可行的方法.
- 可见光提供了一种精确且不易挥发的方法来调整这些系统的电子和磁特性.
- 这些发现为基于氧化物异构结构的新型光电子设备铺平了道路.
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