Uniaxial magnetic anisotropy and weak phonon–spin coupling of a single Ni atom bonded to iridium-doped graphene

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-01-15 DOI:10.1063/5.0248713

Yan Han, Xiaobin Wang, Suyun Wang, Jian-Guo Wan

引用次数: 0

Abstract

We investigate the magnetism and vibrational mode of a single Ni atom bonded to iridium-doped graphene. It is found that the Ni atom exhibits a large magnetic anisotropy energy of 53 meV, and the magnetic anisotropy is perfectly uniaxial. There are no vibrational modes below 40 meV for the Ni atom, which disables the efficient coupling between the spin and phonon at the low magnetic field. The uniaxial magnetic anisotropy combining with the weak phonon–spin coupling effectively resists the quantum tunneling and spin flip, making the Ni atom a viable single atom magnet for information storage.

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单轴磁各向异性和弱声子自旋耦合的单个Ni原子键合铱掺杂石墨烯

我们研究了单个Ni原子与掺杂铱的石墨烯结合的磁性和振动模式。结果表明，Ni原子表现出53 meV的大磁各向异性能，且磁各向异性是完全单轴的。Ni原子在40 meV以下没有振动模式，这使得自旋和声子在低磁场下的有效耦合失效。单轴磁各向异性与弱声子-自旋耦合相结合，有效地抑制了量子隧穿和自旋翻转，使Ni原子成为一种可行的单原子磁体用于信息存储。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.