Strain Tuning of Weyl Nodes in SrRuO<sub>3</sub> Membranes

Article Article scientifique Article Strain Tuning of Weyl Nodes in SrRuO<sub>3</sub> Membranes eng 2026-02-13 author Blah Patrick author Gariglio Stefano 0000-0001-8263-4506 508404 Département de physique de la matière quantique (FIMAC) author Lesne Edouard author Kimbell Graham Francis 0000-0001-9610-3589 990615 author Afanasiev Dmytro author Hortensius Jorrit author Matthiesen Mattias author Groenendijk Dirk author Monteiro Mafalda author Cuoco Mario author Ortix Carmine 0000-0002-6334-0569 author Caviglia Andrea 0000-0001-9650-3371 650026 Département de physique de la matière quantique (FIMAC) acs.nanolett.5c02997 10.1021/acs.nanolett.5c02997 1530-6984 https://pubs.acs.org/doi/10.1021/acs.nanolett.5c02997 Free-standing membranes are an exciting recent development in the field of complex oxides, allowing intrinsic material properties and phenomena to be probed in ways that would be difficult or otherwise inaccessible in epitaxially bound heterostructures. By employment of a water-soluble sacrificial layer of Sr3Al2O6, strain-free ultrathin SrRuO3 membranes have been fabricated that exhibit bulk lattice parameters and ferromagnetism at a Curie temperature of 150 K with the magnetic easy axis oriented 22° off the normal. The presence of sizable negative longitudinal magnetoresistance provides a direct signature of the decisive role played by Weyl Fermions in magnetotransport. In addition, a sign change between the strained films and free-standing SrRuO3 membranes of in-plane transversal magnetotransport indicates a strong electromechanical coupling, resulting in a change of the Fermi velocity of Weyl Fermions. Our measurements provide a first insight into the magnetoelectric properties of SrRuO3 membranes, highlighting the influence of the exfoliation process on structural, electronic, and magnetic degrees of freedom. Oxide heterostructures Oxide membranes Perovskites Weyl nodes Magnetotransport Dewey 500.2 33 Département de physique de la matière quantique 131 false 1382 Groupe Caviglia https://pubs.acs.org/doi/10.1021/acs.nanolett.5c02997 Nano letters 744b9cc4-c6c9-42ea-8c67-51dc1a97424b Article (Published version) Public strain-tuning-of-weyl-nodes-in-srru.pdf 2567673 application/pdf CC BY-4.0 b8bb696444f1cf605f048d889306b82738606887d34f5b178b5e13c43fda46f2 Vignette Public images_medium_nl5c02997_0006.png 71275 image/png openAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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