Probing Quantum Spin Liquids in the Kitaev model through spin current measurements

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-09 DOI:10.1016/j.jmmm.2025.173024

L.V. Santos, A.R. Moura

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引用次数: 0

Abstract

The Kitaev model is classified among an unconventional category of two-dimensional spin models characterized by direction-dependent interactions that facilitate Quantum Spin Liquid (QSL) states. Although the Kitaev model has resulted in extensive theoretical predictions, direct observations of QSL phases necessitate intricate experimental procedures due to the lack of any magnetic order. In this study, we introduce the theoretical analysis of an innovative method to detect the QSL characteristics of magnetic models by examining the spin current injected into the Kitaev model from an adjacent normal metal. We provide a comprehensive development of the injected spin current, identifying distinctive features that delineate the spin transport by Majorana fermions. The findings are compared with typical ferromagnetic junctions, for which the spin carries are provided by magnons, and leveraging insights from spintronics and quantum magnetism, we propose a novel mechanism to verify the existence of QSL states.

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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.