Magnetism, Skyrmions and Chirality

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (15 November 2022) | Viewed by 3298

Special Issue Editors


E-Mail Website
Guest Editor
Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, 5232 Villigen, Switzerland
Interests: neutron and x-ray scattering; topological materials; chiral magnetism; skyrmions

E-Mail Website
Guest Editor
National Research Center “Kurchatov Institute” B.P. Konstantinov Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia
Interests: condensed matter theory; magnetsim theory; nanostructures; chiral magnetism; skyrmions

Special Issue Information

Dear Colleagues,

Advanced magnetic materials are crucial to a number of current and upcoming technologies that are critical in addressing the modern environmental and exploratory challenges. Among these are effective energy transfer, high-density and energy-efficient data storage, green electronics and spintronics, and neuromorphic computing. In the past decade, the manifestation of topology in magnetism has become one of the cornerstones of the modern condensed matter physics. The search for and understanding of the fundamental correlation between material properties and topological magnetic orders is an important step towards their real-life application. Early theoretical proposals of topological magnetic solitons were experimentally confirmed: skyrmions, anti-skyrmions, bi-skyrmions, and merons were discovered in various bulk materials, surfaces, thin films, and nanostructures with symmetry breaking. On the other hand, many questions are still to be answered and numerous issues to be overcome before practical application is feasible.

This Special Issue of Symmetry is aimed at reporting novel theoretical, experimental, and numerical works in non-collinear magnetism, topological phenomena, as well as advances in the methods for the material synthesis, investigation, and manipulation of magnetic skyrmions in devices.

Dr. Victor Ukleev
Dr. Utesov Oleg
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • skyrmions
  • magnetic solitons
  • magnetism
  • topological materials
  • interfaces
  • spintronics
  • chirality

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

30 pages, 5742 KiB  
Article
Fledgling Quantum Spin Hall Effect in Pseudo Gap Phase of Bi2212
by Udai Prakash Tyagi, Kakoli Bera and Partha Goswami
Symmetry 2022, 14(8), 1746; https://doi.org/10.3390/sym14081746 - 22 Aug 2022
Cited by 1 | Viewed by 1451
Abstract
We studied the emergence of the quantum spin Hall (QSH) states for the pseudo-gap (PG) phase of Bi2212 bilayer system, assumed to be D-density wave (DDW) ordered, starting with a strong Rashba spin-orbit coupling (SOC) armed, and the time reversal symmetry (TRS) complaint [...] Read more.
We studied the emergence of the quantum spin Hall (QSH) states for the pseudo-gap (PG) phase of Bi2212 bilayer system, assumed to be D-density wave (DDW) ordered, starting with a strong Rashba spin-orbit coupling (SOC) armed, and the time reversal symmetry (TRS) complaint Bloch Hamiltonian. The presence of strong SOC gives rise to non-trivial, spin-momentum locked spin texture tunable by electric field. The emergence of quantum anomalous Hall effect with TRS broken Chiral DDW Hamiltonian of Das Sarma et al. is found to be possible. Full article
(This article belongs to the Special Issue Magnetism, Skyrmions and Chirality)
Show Figures

Figure 1

23 pages, 3377 KiB  
Article
On Strong f-Electron Localization Effect in a Topological Kondo Insulator
by Udai Prakash Tyagi, Kakoli Bera and Partha Goswami
Symmetry 2021, 13(12), 2245; https://doi.org/10.3390/sym13122245 - 24 Nov 2021
Cited by 2 | Viewed by 1274
Abstract
We study a strong f-electron localization effect on the surface state of a generic topological Kondo insulator (TKI) system by performing a mean-field theoretic (MFT) calculation within the framework of the periodic Anderson model (PAM) using the slave boson technique. The surface [...] Read more.
We study a strong f-electron localization effect on the surface state of a generic topological Kondo insulator (TKI) system by performing a mean-field theoretic (MFT) calculation within the framework of the periodic Anderson model (PAM) using the slave boson technique. The surface metallicity, together with bulk insulation, requires this type of localization. A key distinction between surface states in a conventional insulator and a topological insulator is that, along a course joining two time-reversal invariant momenta (TRIM) in the same BZ, there will be an intersection of these surface states, an even/odd number of times, with the Fermi energy inside the spectral gap. For an even (odd) number of surface state crossings, the surface states are topologically trivial (non-trivial). The symmetry consideration and the pictorial representation of the surface band structure obtained here show an odd number of crossings, leading to the conclusion that, at least within the PAM framework, the generic system is a strong topological insulator. Full article
(This article belongs to the Special Issue Magnetism, Skyrmions and Chirality)
Show Figures

Figure 1

Back to TopTop