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024 7 _ |a 10.1126/sciadv.abi7291
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100 1 _ |a Brinker, Sascha
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245 _ _ |a Anomalous excitations of atomically crafted quantum magnets
260 _ _ |a Washington, DC [u.a.]
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520 _ _ |a High–energy resolution spectroscopic studies of quantum magnets proved extremely valuable in accessing magnetodynamics quantities, such as energy barriers, magnetic interactions, and lifetime of excited states. Here, we investigate a previously unexplored flavor of low-energy spin excitations for quantum spins coupled to an electron bath. In sharp contrast to the usual tunneling signature of two steps symmetrically centered around the Fermi level, we find a single step in the conductance. Combining time-dependent and many-body perturbation theories, magnetic field–dependent tunneling spectra are explained as the result of an interplay between weak magnetic anisotropy energy, magnetic interactions, and Stoner-like electron-hole excitations that are strongly dependent on the magnetic states of the nanostructures. The results are rationalized in terms of a noncollinear magnetic ground state and the dominance of ferro- and antiferromagnetic interactions. The atomically crafted nanomagnets offer an appealing model for the exploration of electrically pumped spin systems.
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700 1 _ |a Küster, Felix
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700 1 _ |a Parkin, Stuart S. P.
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700 1 _ |a Sessi, Paolo
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700 1 _ |a Lounis, Samir
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773 _ _ |a 10.1126/sciadv.abi7291
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|y 2022
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856 4 _ |u https://juser.fz-juelich.de/record/910476/files/Invoice_APC600272939.pdf
856 4 _ |u https://juser.fz-juelich.de/record/910476/files/Anomalous%20excitations%20of%20atomically%20crafted%20quantum%20magnets.pdf
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