open access publication

Article, 2024

Optical control of 4f orbital state in rare-earth metals

SCIENCE ADVANCES, ISSN 2375-2548, 2375-2548, Volume 10, 16, 10.1126/sciadv.adk9522

Contributors

Thielemann-Kuehn, Nele (Corresponding author) [1] Amrhein, Tim [1] Bronsch, Wibke 0000-0002-6012-9290 [1] [2] Jana, Somnath [3] [4] [5] Pontius, Niko [4] [5] Engel, Robin Y. 0000-0002-2347-241X [5] [6] [7] Miedema, Piter S. [5] [7] Legut, Dominik 0000-0001-9185-9934 [8] [9] Carva, K. 0000-0002-2275-1986 [9] Atxitia, Unai [1] [10] [11] van Kuiken, Benjamin E. [12] Teichmann, Martin [12] Carley, Robert E. [12] Mercadier, Laurent [12] Yaroslavtsev, Alexander [12] [13] [14] Mercurio, Giuseppe [12] Le Guyader, Loic [12] Agarwal, Naman 0000-0002-1251-6608 [12] [15] Gort, Rafael [12] Scherz, Andres [12] Dziarzhytski, S. 0000-0003-3659-7702 [5] [7] Brenner, Guenter [5] [7] Pressacco, Federico [5] [7] Wang, Ru-Pan [5] [7] [16] Schunck, Jan O. 0000-0003-3945-191X [5] [7] [16] Sinha, Mangalika [5] [7] [17] Beye, Martin [5] [6] [7] Chiuzbaian, Gheorghe S. [18] [19] Oppeneer, Peter M. [14] Weinelt, Martin 0000-0002-5952-5130 [1] Schuessler-Langeheine, Christian [4] [5]

Affiliations

  1. [1] Free Univ Berlin, Fachbereich Phys, Arnimallee 14, D-14195 Berlin, Germany
    2. [NORA names: Germany; Europe, EU; OECD];
  2. [2] Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163,5, I-34149 Trieste, Italy
    3. [NORA names: Italy; Europe, EU; OECD];
  3. [3] Max Born Inst Nonlinear Opt & Short Pulse Spect, D-12489 Berlin, Germany
    4. [NORA names: Germany; Europe, EU; OECD];
  4. [4] Helmholtz Zentrum Berlin Mat & Energie GmbH, Albert Einstein Str 15, D-12489 Berlin, Germany
    5. [NORA names: Germany; Europe, EU; OECD];
  5. [5] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany
    6. [NORA names: Germany; Europe, EU; OECD];

Abstract

A change of orbital state alters the coupling between ions and their surroundings drastically. Orbital excitations are hence key to understand and control interaction of ions. Rare-earth elements with strong magneto-crystalline anisotropy (MCA) are important ingredients for magnetic devices. Thus, control of their localized 4f magnetic moments and anisotropy is one major challenge in ultrafast spin physics. With time-resolved x-ray absorption and resonant inelastic scattering experiments, we show for Tb metal that 4f-electronic excitations out of the ground-state multiplet occur after optical pumping. These excitations are driven by inelastic 5d-4f-electron scattering, altering the 4f-orbital state and consequently the MCA with important implications for magnetization dynamics in 4f-metals and more general for the excitation of localized electronic states in correlated materials.

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