Improvement of the spin-valley polarization and tunneling magnetoresistance in magnetic silicene superlattices by means of aperiodic Kolakoski order

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-02-18 DOI:10.1016/j.jmmm.2025.172871

J.G. Rojas-Briseño, P. Villasana-Mercado, S. Molina-Valdovinos, R. Rodríguez-González, I. Rodríguez-Vargas

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引用次数: 0

Abstract

Aperiodic order is quite relevant in science and technology. The aperiodic order is characterized by the so-called aperiodic sequences. Among the most important sequences we can find the Fibonacci, Thue–Morse, and Cantor sequences. The Thue–Morse and Cantor sequence have been instrumental in improving the spin-valley polarization and tunneling magnetoresistance (TMR) of magnetic silicene superlattices (MSSLs). Here, we study the impact of aperiodic Kolakoski order on the spin-valley polarization and TMR of MSSLs. The spin-valley polarization and TMR of Kolakoski (K-) MSSLs are compared with the ones of periodic (P-), Thue–Morse (TM-), and Cantor (C-) MSSLs. We find that the higher degree of disorder of the Kolakoski sequence reduces the total conductance of the antiparallel magnetization configuration, resulting in an effective enhancement of the TMR. Also, the aperiodic Kolakoski order gives rise to energy regions of two well-defined spin-valley polarization states accessible by switching the magnetization direction. The aperiodic Kolakoski order in conjunction with structural asymmetry can optimize the spin-valley polarization and TMR of MSSLs. The spin-valley polarization and TMR capabilities of K-MSSLs are superior than the ones of P-, TM-, and C-MSSLs.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.