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Skyrmions are emerging topological spin structures that are potentially revolutionary for future data storage and spintronics applications. The existence and stability of skyrmions in magnetic materials is usually associated to the presence…

Mesoscale and Nanoscale Physics · Physics 2018-03-14 R. L. Novak , F. Garcia , E. R. P. Novais , J. P. Sinnecker , A. P. Guimarães

The electronic band structure of correlated Ca3Ru2O7 featuring an antiferromagnetic as well as a structural transition has been determined theoretically at high temperatures, which has led to the understanding of the remarkable properties…

Strongly Correlated Electrons · Physics 2018-01-30 Hui Xing , Libin Wen , Chenyi Shen , Jiaming He , Xinxin Cai , Jin Peng , Shun Wang , Mingliang Tian , Zhu-An Xu , Wei Ku , Zhiqiang Mao , Ying Liu

Studies of moire systems have elucidated the exquisite effect of quantum geometry on the electronic bands and their properties, leading to the discovery of new correlated phases. However, most experimental studies have been confined to a…

Mesoscale and Nanoscale Physics · Physics 2023-12-19 Zhurun Ji , Yuzhou Zhao , Yicong Chen , Ziyan Zhu , Yuhui Wang , Wenjing Liu , Gaurav Modi , Eugene J. Mele , Song Jin , Ritesh Agarwal

Magnetic skyrmions are localized nanometric spin textures with quantized winding numbers as the topological invariant. Rapidly increasing attention has been paid to the investigations of skyrmions since their experimental discovery in 2009,…

Strongly Correlated Electrons · Physics 2018-07-31 Ping Huang , Marco Cantoni , Alex Kruchkov , Rajeswari Jayaraman , Arnaud Magrez , Fabrizio Carbone , Henrik M. Ronnow

The use of current-generated spin-orbit torques[1] to drive magnetization dynamics is under investigation to enable a new generation of non-volatile, low-power magnetic memory. Previous research has focused on spin-orbit torques generated…

LiNbO3 (LN) is renowned for its exceptional ferroelectric properties, particularly its notable linear electro-optical (EO) effect, which is highly advantageous for various applications such as high-speed communication, optical computation,…

Materials Science · Physics 2024-08-20 Yalong Yu , Bo Xiong , Siqi Wu , Yekai Ren , Nuo Chen , Qingjiao Mi , Zhaojie Zheng , Kangping Lou , Rui Wang , Tao Chu

We report the observation of room-temperature magnetic skyrmions in Pt/Co/Os/Pt thin-film heterostructures and their response to electric currents. The magnetic properties are extremely sensitive to inserting thin Os layers between the…

Mesoscale and Nanoscale Physics · Physics 2018-04-25 R. Tolley , S. A. Montoya , E. E. Fullerton

Quantum anomalous Hall effect, with a trademark of dissipationless chiral edge states for electronics/spintronics transport applications, can be realized in materials with large spin-orbit coupling and strong intrinsic magnetization. After…

Mesoscale and Nanoscale Physics · Physics 2021-01-05 Muhammad Nadeem , Alex R. Hamilton , Michael S. Fuhrer , Xiaolin Wang

Skyrmions as well as skyrmion bags in magnetic thin films are promising candidates for future high-density memory devices. The observation of skyrmion bags in liquid crystals and their predicted existence in ferromagnetic films has sparked…

Materials Science · Physics 2024-11-28 Naim Ahmad , Chirag Kalouni , Abhay Singh Rajawat , Waseem Akhtar

Nanoscale chiral skyrmions in noncentrosymmetric helimagnets are promising binary state variables in high-density, low-energy nonvolatile memory. Skyrmions are ubiquitous as an ordered, single-domain lattice phase, which makes it difficult…

Mesoscale and Nanoscale Physics · Physics 2016-11-28 S. L. Zhang , A. Bauer , H. Berger , C. Pfleiderer , G. van der Laan , T. Hesjedal

Magnetic skyrmions are topologically-protected spin textures that exhibit fascinating physical behaviors and large potential in highly energy efficient spintronic device applications. The main obstacles so far are that skyrmions have been…

Topological magnetic skyrmions in centrosymmetric systems exhibit a higher degrees of freedom in their helicity, hence possess a great potential in the advanced spintronics including skyrmion based quantum computation. However, the…

Spintronics, an evolving interdisciplinary field at the intersection of magnetism and electronics, explores innovative applications of electron charge and spin properties for advanced electronic devices. The topological Hall effect, a key…

We systematically investigate the influence of high pressure on the electronic transport properties of layered ferromagnetic materials, in particular, those of Fe$_3$GeTe$_2$. Its crystal sustains a hexagonal phase under high pressures up…

We study inter-skyrmion interactions and stable spin configurations in a 2D chiral magnet with in-plane anisotropies of a tilted magnetic field and the magneto-crystalline anisotropy on a (011) thin film. We find that in both cases a small…

Mesoscale and Nanoscale Physics · Physics 2021-12-15 Mai Kameda , Rio Koyama , Takuro Nakajima , Yuki Kawaguchi

Magnetic skyrmions present interesting physics due to their topological nature and hold significant promise for future information technologies. A key barrier to realizing skyrmion devices has been stabilizing these spin structures under…

Increasing amounts of information force the continuous improvement of information storage and processing technologies, further device miniaturization, and their efficiency increase. Magnetic skyrmions, topological quasiparticles, and the…

Mesoscale and Nanoscale Physics · Physics 2022-04-13 Mateusz Zelent , Mathieu Moalic , Michal Mruczkiewicz , Xiaoguang Li , Yan Zhou , Maciej Krawczyk

Materials with strong electronic correlations host remarkable -- and technologically relevant -- phenomena such as magnetism, superconductivity and metal-insulator transitions. Harnessing and controlling these effects is a major challenge,…

In the MnSi bulk chiral magnet, magnetic skyrmion strings of 17 nm in diameter appear in the form of a lattice, penetrating the sample thickness, 10-1,000 um. Although such a bundle of skyrmion strings may exhibit complex soft-matter-like…

Strongly Correlated Electrons · Physics 2017-11-10 F. Kagawa , H. Oike , W. Koshibae , A. Kikkawa , Y. Okamura , Y. Taguchi , N. Nagaosa , Y. Tokura

Magnetic skyrmions are stable topological solitons with complex non-coplanar spin structures. Their nanoscopic size and the low electric currents required to initiate and control their motion has opened a new field of research, skyrmionics,…