%0 Journal Article %1 jo2021visualizing %A Jo, Na Hyun %A Wu, Yun %A Trevisan, Thaís V. %A Wang, Lin-Lin %A Lee, Kyungchan %A Kuthanazhi, Brinda %A Schrunk, Benjamin %A Bud’ko, S. L. %A Canfield, P. C. %A Orth, P. P. %A Kaminski, Adam %D 2021 %J Nat. Commun %K b %N 1 %P 7169-- %R 10.1038/s41467-021-27277-6 %T Visualizing band selective enhancement of quasiparticle lifetime in a metallic ferromagnet %U https://doi.org/10.1038/s41467-021-27277-6 %V 12 %X 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.

@article{jo2021visualizing, abstract = {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.}, added-at = {2023-11-20T17:07:51.000+0100}, author = {Jo, Na Hyun and Wu, Yun and Trevisan, Thaís V. and Wang, Lin-Lin and Lee, Kyungchan and Kuthanazhi, Brinda and Schrunk, Benjamin and Bud’ko, S. L. and Canfield, P. C. and Orth, P. P. and Kaminski, Adam}, biburl = {https://www.bibsonomy.org/bibtex/2d15806377ef1d8a87b98350c7222f76e/ctqmat}, day = 09, doi = {10.1038/s41467-021-27277-6}, interhash = {27d844764414d79b09d53d30bca4ca90}, intrahash = {d15806377ef1d8a87b98350c7222f76e}, issn = {20411723}, journal = {Nat. Commun}, keywords = {b}, month = {12}, number = 1, pages = {7169--}, refid = {Jo2021}, timestamp = {2023-11-24T10:28:42.000+0100}, title = {Visualizing band selective enhancement of quasiparticle lifetime in a metallic ferromagnet}, url = {https://doi.org/10.1038/s41467-021-27277-6}, volume = 12, year = 2021 }