通过局部稀释的无异性二维抗铁磁体的非凡磁性反应
Junyi Yang1, Hidemaro Suwa2, Derek Meyers3,4
1Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States.
Nano letters
|December 14, 2023
概括
一个磁场显著提高了2D量子反铁磁体的秩序温度,通过使从无序到有序状态的直接过渡,绕过中间阶段.
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
- 量子磁力 量子磁力 量子磁力
背景情况:
- 二维 (2D) 磁体系统表现出增强的旋转波动,通常降低磁性排序温度.
- 了解影响低维材料磁性排序的因素对于开发新型电子设备至关重要.
研究的目的:
- 为了研究适度磁场对局部稀释的2D异性质量子反铁磁体磁性秩序的影响.
- 探索增强磁反应和改变顺序过渡背后的机制.
主要方法:
- 制造一个[(SrIrO3)1/(SrTiO3)2]超晶格薄膜,以实现一个伪旋转半方格晶格.
- 应用磁场相当于海森堡超交换相互作用的1000分之一.
- 使用Dzyaloshinskii-Moriya相互作用来对分级磁化与外部场进行线性合.
- 模型分析以了解旋转波动和稀释的作用.
主要成果:
- 一个磁场诱导了交叉,作为一个有效的顺序过渡,在温度大约6倍于Néel过渡温度.
- 该系统直接从同位素无序状态过渡到反铁磁性有序状态,绕过一种异位素阶段.
- 发现适度稀释可以增强同位素波动,促进跳过异位素疗法.
结论:
- 在被研究的2D量子反铁磁体中,获得了强烈的磁反应和显著增强的订制温度.
- 在这种现象中,Dzyaloshinskii-Moriya相互作用和增强的同位素波动起着关键作用.
- 这为控制2D材料中的磁性排序提供了一条途径,在自旋电子学中具有潜在的应用.
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