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10.58160/0qcx3mu9ng8m71v72026-04-24T07:48:39Z

10.58160/0qcx3mu9ng8m71v7 Härtl, Patrick Patrick Härtl 0000-0003-0645-0080 University of Würzburg University of Würzburg 2024-2025 2025 Physics Spin-polarized scanning tunneling microscopy Rare-earth magnetic materials Magnetic thin films Europium Epitaxy Electronic structure Spin texture Surface state Open Access Creative Commons Attribution 4.0 International Bode, Matthias 0000-0001-7514-5560 Härtl, Patrick 0000-0003-0645-0080 Bode, Matthias 0000-0001-7514-5560 University of Würzburg Leisegang, Markus 0000-0002-7807-4224 University of Würzburg Sankeshwar, Vijayalaxmi 0009-0006-0651-9956 Indian Institute of Science Education and Research Pune Raw data used for the manuscript: "Structural, electronic, and magnetic properties of Europium films epitaxially grown on W(110)" published in Physical Review B. This study presents a detailed spin-polarized scanning tunneling microscopy (SP-STM) analysis on the structural, electronic and magnetic properties on Europium (Eu) films epitaxially grown on a W(110) substrate. Utilizing optimized growth parameters, we conduct a thickness-dependent series ranging from the sub-monolayer regime to films as thick as 650 AL. Atomically resolved STM images of a 130 AL Eu film unveil lateral periodic sequences of bcc(110)-ordered dislocation lines sandwiched between adjacent hcp(0001) segments, effectively relieving stress within the films. These dislocation lines exhibit a periodicity of p_topo = (3.36 ± 0.11) nm. Tunneling spectroscopy reveals that the surface of Eu films hosts a pronounced double-peak structure at about U_bias ≈ +0.30 V and ≈ +0.48 V, corresponding to unoccupied sample states. It is interpreted as an exchange-split dz^2-like surface state which remains robust even within the bcc(110) structure of the dislocation lines. Magnetically sensitive data reveal a spin spiral with a surface periodicity of p_mag = (2.76 ± 0.19) nm. The results are discussed in terms of bulk-terminated spin spirals in hcp Eu which propagate along ⟨-1-123⟩ directions in the surface-near region. We acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through Project No. 510676484 (GZ: BO 1468/29-1) and under Germany’s Excellence Strategy through the Würzburg– Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter, ct.qmat (EXC 2147, Project No. 390858490). Please read the "README.txt" file for further information. CryoMag STM Laboratory see "README.txt" en 10.1103/175v-7ltx Deutsche Forschungsgemeinschaft https://ror.org/018mejw64 510676484 Spinstruktur dünner Seltenerdmetall-Filme Deutsche Forschungsgemeinschaft https://ror.org/018mejw64 390858490 EXC 2147: Komplexität und Topologie in Quantenmaterialien (CT.QMAT) application/x-tar