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Publisher DOI: 10.1103/PhysRevLett.126.177203
Title: Nonlinear Decay of Quantum Confined Magnons in Itinerant Ferromagnets
Language: English (United States)
Authors: Zakeri, Khalil 
Hjelt, A. 
Maznichenko, Igor 
Buczek, Pawel  
Ernst, Arthur 
Keywords: Physics - Materials Science;Physics - Materials Science;Physics - Strongly Correlated Electrons;
Issue Date: 28-Apr-2021
Publisher: American Physical Society
Source: article number : 177203
Journal or Series Name: Physical Review Letters 
Volume: 126
Issue: 17
Quantum confinement leads to the emergence of several magnon modes in ultrathin layered magnetic structures. We probe the lifetime of these quantum confined modes in a model system composed of three atomic layers of Co grown on different surfaces. We demonstrate that the quantum confined magnons exhibit nonlinear decay rates, which strongly depend on the mode number, in sharp contrast to what is assumed in the classical dynamics. Combining the experimental results with those of linear-response density functional calculations we provide a quantitative explanation for this nonlinear damping effect. The results provide new insights into the decay mechanism of spin excitations in ultrathin films and multilayers and pave the way for tuning the dynamical properties of such structures.
ISSN: 1079-7114
Institute: Fakultät Technik und Informatik 
Department Informations- und Elektrotechnik 
Type: Article
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