Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T00: Poster Session III (1pm-4pm PST)
1:00 PM,
Thursday, March 9, 2023
Room: Exhibit Hall (Forum Ballroom)
Sponsoring
Unit:
APS
Abstract: T00.00054 : Evidence for orbital correlations and incipient orbital magnetism in ultrathin Co/Ni films*
Presenter:
Joshua Peacock
(Emory University)
Authors:
Joshua Peacock
(Emory University)
Sergei Ivanov
(Emory University)
Sergei Urazhdin
(Emory University)
We utilize the Hubbard model complemented with two-order-parameter mean-field calculations to show that our observations can be explained by ferromagnetic orbital correlations between 3d electrons associated with orbitally-selective electron hopping confined to the film plane. Such correlations are maximized for 3d shell population of one hole per site realized in thin Co/Ni films with equal thicknesses of Co and Ni. Our model shows that ferromagnetism in thin films can be substantially enhanced by orbital correlations. These correlations allow one to control magnetic anisotropy and magnetoelectronic phenomena associated with spin-orbit coupling such as anomalous and spin Hall effects.
*This work was supported by NSF award ECCS-2005786.
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