凝聚态物理
极化(电化学)
Valleytronics公司
铁磁性
物理
各向异性
磁场
电场
自旋电子学
光学
化学
量子力学
物理化学
作者
Chunsheng Hu,Yun-Jing Wu,Yuan-Shuo Liu,Shuai Fu,Xiaoning Cui,Yihao Wang,Changwen Zhang
出处
期刊:Chinese Physics B
[IOP Publishing]
日期:2023-03-01
卷期号:32 (3): 037306-037306
被引量:2
标识
DOI:10.1088/1674-1056/ac89d6
摘要
Manipulation of the valley degree of freedom provides a new path for quantum information technology, but the real intrinsic large valley-polarization materials are rarely reported up to date. Here, we perform first-principles calculations to predict a class of 2H-phase single layer (SL) materials Lu X 2 ( X = Cl, Br, I) to be ideal candidates. SL-Lu X 2 are ferrovalley materials with a giant valley-polarization of 55 meV–148 meV as a result of its large spin–orbital coupling (SOC) and intrinsic ferromagnetism (FM). The magnetic transition temperatures of SL-LuI 2 and SL-LuCl 2 are estimated to be 89 K–124 K, with a sizable magnetic anisotropy at out-of-plane direction. Remarkably, the anomalous valley Hall effect (AVHE) can be controlled in SL-Lu X 2 when an external electric field is applied. Moreover, the intrinsic valley-polarization of SL-LuI 2 is highly robust for biaxial strain. These findings provide a promising ferrovalley material system for the experimentation of valleytronics and subsequent applications.
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