Visualizing band selective enhancement of quasiparticle lifetime in a metallic ferromagnet
| Autor: | Na Hyun Jo, Yun Wu, Thaís V. Trevisan, Lin-Lin Wang, Kyungchan Lee, Brinda Kuthanazhi, Benjamin Schrunk, S. L. Bud’ko, P. C. Canfield, P. P. Orth, Adam Kaminski |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Multidisciplinary
Electronic properties and materials Strongly Correlated Electrons (cond-mat.str-el) Science General Physics and Astronomy FOS: Physical sciences General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect General Biochemistry Genetics and Molecular Biology Article Condensed Matter - Strongly Correlated Electrons Condensed Matter::Materials Science Magnetic properties and materials Condensed Matter::Superconductivity Topological insulators Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Electrons navigate more easily in a background of ordered magnetic moments than around randomly oriented ones. This fundamental quantum mechanical principle is due to their Bloch wave nature and also underlies ballistic electronic motion in a perfect crystal. As a result, a paramagnetic metal that develops ferromagnetic order often experiences a sharp drop in the resistivity. Despite the universality of this phenomenon, a direct observation of the impact of ferromagnetic order on the electronic quasiparticles in a magnetic metal is still lacking. Here we demonstrate that quasiparticles experience a significant enhancement of their lifetime in the ferromagnetic state of the low-density magnetic semimetal EuCd2As2, but this occurs only in selected bands and specific energy ranges. This is a direct consequence of the magnetically induced band splitting and the multi-orbital nature of the material. Our detailed study allows to disentangle different electronic scattering mechanisms due to non-magnetic disorder and magnon exchange. Such high momentum and energy dependence quasiparticle lifetime enhancement can lead to spin selective transport and potential spintronic applications. Comment: 15 pages, 4 figures + supplement |
| Databáze: | OpenAIRE |
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