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000910476 1001_ $$0P:(DE-Juel1)168211$$aBrinker, Sascha$$b0$$eCorresponding author
000910476 245__ $$aAnomalous excitations of atomically crafted quantum magnets
000910476 260__ $$aWashington, DC [u.a.]$$bAssoc.$$c2022
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000910476 520__ $$aHigh–energy resolution spectroscopic studies of quantum magnets proved extremely valuable in accessing magnetodynamics quantities, such as energy barriers, magnetic interactions, and lifetime of excited states. Here, we investigate a previously unexplored flavor of low-energy spin excitations for quantum spins coupled to an electron bath. In sharp contrast to the usual tunneling signature of two steps symmetrically centered around the Fermi level, we find a single step in the conductance. Combining time-dependent and many-body perturbation theories, magnetic field–dependent tunneling spectra are explained as the result of an interplay between weak magnetic anisotropy energy, magnetic interactions, and Stoner-like electron-hole excitations that are strongly dependent on the magnetic states of the nanostructures. The results are rationalized in terms of a noncollinear magnetic ground state and the dominance of ferro- and antiferromagnetic interactions. The atomically crafted nanomagnets offer an appealing model for the exploration of electrically pumped spin systems.
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000910476 7001_ $$aKüster, Felix$$b1
000910476 7001_ $$00000-0003-4702-6139$$aParkin, Stuart S. P.$$b2
000910476 7001_ $$aSessi, Paolo$$b3
000910476 7001_ $$0P:(DE-Juel1)130805$$aLounis, Samir$$b4$$eCorresponding author
000910476 773__ $$0PERI:(DE-600)2810933-8$$a10.1126/sciadv.abi7291$$gVol. 8, no. 4, p. eabi7291$$n4$$peabi7291$$tScience advances$$v8$$x2375-2548$$y2022
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