Tunable spin/valley splitting and multiple Hall effects in interlayer coupling-dependent SVSiN2 multiferroic bilayers

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-03-18 DOI:10.1063/5.0241163

Yunxi Qi, Jun Zhao, Hui Zeng

引用次数: 0

Abstract

Compared to two-dimensional (2D) monolayered ferrovalley semiconductors (FVS), 2D FVS bilayers with interlayer coupling are more sensitive to external electric fields, and their applications for valleytronics and spintronics are very promising. Using first principles calculations, we demonstrate that the valley and spin degeneracy in the SVSiN2 bilayer can be manipulated through different interlayer magnetic orders and stackings. Compared with its monolayer counterpart, the valley/spin polarization in the SVSiN2 bilayer is highly tunable by electric field. Specifically, different stackings, magnetic orders, and vertical electric fields could result in various transport behaviors for the SVSiN2 bilayer, including spin Hall current, valley Hall current, and anomalous Hall current with different valley, spin, and layer combinations. In addition, the AB and AC stacked SVSiN2 bilayers with mirror symmetry breaking exhibit the coexistence of ferrovalley and ferroelectric polarization. Our work provides a theoretical foundation and an effective route to manipulate valley/spin in 2D bilayers.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.