Bulletin of the American Physical Society
New England Section Fall 2023 Meeting
Friday–Saturday, October 20–21, 2023; University of Rhode Island, Kingston, Rhode Island
Session J03: Condensed Matter Physics
10:50 AM–12:20 PM,
Saturday, October 21, 2023
University of Rhode Island
Room: Engineering Fascitelli Center 040
Chair: Leonard Kahn, University of Rhode Island
Abstract: J03.00003 : Interaction between topological defects in Cu2OSeO3: skyrmion lattice annihilation by 3D point defects*
11:20 AM–11:35 AM
Presenter:
Houssam SABRI
(Department of Physics and Astronomy, University of New Hampshire, Durham, New Hampshire 03824, USA)
Authors:
Houssam SABRI
(Department of Physics and Astronomy, University of New Hampshire, Durham, New Hampshire 03824, USA)
Igor Kornev
(Université Paris-Saclay, CentraleSupélec, CNRS, Laboratoire SPMS UMR 8580, 91190, Gif-sur-Yvette, France.)
Its phase diagram shows a variety of noncollinear spin states. At low magnetic fields, the ground state is an incommensurate helical spiral with a long period of about 60nm. The magnetic field-temperature phase diagram was similar to those reported for the metallic alloys that show skyrmions. Moreover, the system can become polar when the hexagonal skyrmion lattice is formed in Cu2OSeO3 with a small applied magnetic field [3].
Our previous study [4] with the effective Hamiltonian scheme has reproduced the magnetic field-temperature phase diagram. We use the same approach to reveal the hidden connection between various topological defects (3D point defects and skyrmions) in Cu2OSeO3. We show (i) that Cu2OSeO3 hosts different topological defects with a non-zero local topological charge at different regions of the phase diagram (H, T). (ii) Point defects exerting external pressure on skyrmions, leading to their gradual annihilation as temperature increases. (iii) The annihilation of skyrmions is done by the melting of the lattice into a glassy-like state of spins that connects with the paramagnetic phase [5].
*.This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement N° 964931 (TSAR).
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700