介观伊辛链中的磁序和远程相互作用

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review B Pub Date : 2025-01-16 DOI:10.1103/physrevb.111.l020408

Christina Vantaraki, Matías P. Grassi, Kristina Ignatova, Michael Foerster, Unnar B. Arnalds, Daniel Primetzhofer, Vassilios Kapaklis

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引用次数: 0

摘要

通过调制远程相互作用，研究了一维介观磁伊辛链中磁有序的设计。这些相互作用受到链的几何变化的影响，这些变化调整了能量层次和产生的磁基态。因此，磁有序可以在反铁磁和反铁磁二聚体相之间进行调谐。这些相在传统电子束光刻和离子注入技术制备的链中被实验观察到，证明了在中尺度上控制磁性能的可行性。通过热退火获得这些磁性结构的能力，强调了在解决组合优化任务中使用这种系统而不是模拟退火的潜力。2025年由美国物理学会出版

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Magnetic order and long-range interactions in mesoscopic Ising chains

We investigate the design of magnetic ordering in one-dimensional mesoscopic magnetic Ising chains by modulating long-range interactions. These interactions are affected by geometrical modifications to the chain, which adjust the energy hierarchy and the resulting magnetic ground states. Consequently, the magnetic ordering can be tuned between antiferromagnetic and antiferromagnetic dimer phases. These phases are experimentally observed in chains fabricated using both conventional electron-beam lithography and ion implantation techniques, demonstrating the feasibility of controlling magnetic properties at the mesoscale. The ability of attaining these magnetic structures by thermal annealing, underlines the potential of using such systems instead of simulated annealers in tackling combinatorial optimization tasks.

Published by the American Physical Society

2025

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来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter