Das, P and Leeb, V and Knolle, J and Knap, M (2024) Realizing Altermagnetism in Fermi-Hubbard Models with Ultracold Atoms. In: Physical Review Letters, 132 (26).
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Abstract
Altermagnetism represents a type of collinear magnetism, that is in some aspects distinct from ferromagnetism and from conventional antiferromagnetism. In contrast to the latter, sublattices of opposite spin are related by spatial rotations and not only by translations and inversions. As a result, altermagnets have spin-split bands leading to unique experimental signatures. Here, we show theoretically how a d-wave altermagnetic phase can be realized with ultracold fermionic atoms in optical lattices. We propose an altermagnetic Hubbard model with anisotropic next-nearest neighbor hopping and obtain the Hartree-Fock phase diagram. The altermagnetic phase separates in a metallic and an insulating phase and is robust over a large parameter regime. We show that one of the defining characteristics of altermagnetism, the anisotropic spin transport, can be probed with trap-expansion experiments. © 2024 American Physical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Physical Review Letters |
| Publisher: | American Physical Society |
| Additional Information: | The copyright for this article belongs to authors. |
| Keywords: | Anisotropy; Fermions; Ferromagnetism; Optical lattices, Fermionic atoms; Hartree-fock; Insulating phase; Metallics; Nearest neighbor hopping; Spatial rotation; Spin-split bands; Sub-lattices; Ultra-cold; Ultracold atoms, Hubbard model, article; atom; controlled study; delta rhythm; magnetism; rotation |
| Department/Centre: | UG Programme |
| Date Deposited: | 18 Dec 2024 06:36 |
| Last Modified: | 18 Dec 2024 06:36 |
| URI: | http://eprints.iisc.ac.in/id/eprint/85849 |
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