1
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Eremeev SV, Glazkova D, Poelchen G, Kraiker A, Ali K, Tarasov AV, Schulz S, Kliemt K, Chulkov EV, Stolyarov VS, Ernst A, Krellner C, Usachov DY, Vyalikh DV. Insight into the electronic structure of the centrosymmetric skyrmion magnet GdRu 2Si 2. NANOSCALE ADVANCES 2023; 5:6678-6687. [PMID: 38024312 PMCID: PMC10662135 DOI: 10.1039/d3na00435j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023]
Abstract
The discovery of a square magnetic-skyrmion lattice in GdRu2Si2, with the smallest so far found skyrmion size and without a geometrically frustrated lattice, has attracted significant attention. In this work, we present a comprehensive study of surface and bulk electronic structures of GdRu2Si2 by utilizing momentum-resolved photoemission (ARPES) measurements and first-principles calculations. We show how the electronic structure evolves during the antiferromagnetic transition when a peculiar helical order of 4f magnetic moments within the Gd layers sets in. A nice agreement of the ARPES-derived electronic structure with the calculated one has allowed us to characterize the features of the Fermi surface (FS), unveil the nested region along kz at the corner of the 3D FS, and reveal their orbital compositions. Our findings suggest that the Ruderman-Kittel-Kasuya-Yosida interaction plays a decisive role in stabilizing the spiral-like order of Gd 4f moments responsible for the skyrmion physics in GdRu2Si2. Our results provide a deeper understanding of electronic and magnetic properties of this material, which is crucial for predicting and developing novel skyrmion-based systems.
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Affiliation(s)
- S V Eremeev
- Institute of Strength Physics and Materials Science, Russian Academy of Sciences 634055 Tomsk Russia
| | - D Glazkova
- St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia
| | - G Poelchen
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden D-01062 Dresden Germany
| | - A Kraiker
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt Max-von-Laue Strasse 1 D-60438 Frankfurt am Main Germany
| | - K Ali
- Department of Microtechnology and Nanoscience, Chalmers University of Technology Göteborg 41296 Sweden
| | - A V Tarasov
- St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia
- Moscow Institute of Physics and Technology Institute Lane 9, Dolgoprudny Russia
| | - S Schulz
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden D-01062 Dresden Germany
| | - K Kliemt
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt Max-von-Laue Strasse 1 D-60438 Frankfurt am Main Germany
| | - E V Chulkov
- St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Facultad de Ciencias Químicas, Universidad del País Vasco UPV/EHU 20080 San Sebastián/Donostia Spain
- Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU 20018 San Sebastián/Donostia Spain
- Donostia International Physics Center (DIPC) 20018 Donostia-San Sebastián Spain
| | - V S Stolyarov
- Moscow Institute of Physics and Technology Institute Lane 9, Dolgoprudny Russia
- Dukhov Research Institute of Automatics (VNIIA) Moscow 127055 Russia
- National University of Science and Technology MISIS Moscow 119049 Russia
| | - A Ernst
- Institute for Theoretical Physics, Johannes Kepler University Linz Austria
| | - C Krellner
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt Max-von-Laue Strasse 1 D-60438 Frankfurt am Main Germany
| | - D Yu Usachov
- St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia
- Moscow Institute of Physics and Technology Institute Lane 9, Dolgoprudny Russia
- National University of Science and Technology MISIS Moscow 119049 Russia
| | - D V Vyalikh
- Donostia International Physics Center (DIPC) 20018 Donostia-San Sebastián Spain
- IKERBASQUE, Basque Foundation for Science 48011 Bilbao Spain
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2
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Poelchen G, Hellwig J, Peters M, Usachov DY, Kliemt K, Laubschat C, Echenique PM, Chulkov EV, Krellner C, Parkin SSP, Vyalikh DV, Ernst A, Kummer K. Long-lived spin waves in a metallic antiferromagnet. Nat Commun 2023; 14:5422. [PMID: 37669952 PMCID: PMC10480465 DOI: 10.1038/s41467-023-40963-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 08/17/2023] [Indexed: 09/07/2023] Open
Abstract
Collective spin excitations in magnetically ordered crystals, called magnons or spin waves, can serve as carriers in novel spintronic devices with ultralow energy consumption. The generation of well-detectable spin flows requires long lifetimes of high-frequency magnons. In general, the lifetime of spin waves in a metal is substantially reduced due to a strong coupling of magnons to the Stoner continuum. This makes metals unattractive for use as components for magnonic devices. Here, we present the metallic antiferromagnet CeCo2P2, which exhibits long-living magnons even in the terahertz (THz) regime. For CeCo2P2, our first-principle calculations predict a suppression of low-energy spin-flip Stoner excitations, which is verified by resonant inelastic X-ray scattering measurements. By comparison to the isostructural compound LaCo2P2, we show how small structural changes can dramatically alter the electronic structure around the Fermi level leading to the classical picture of the strongly damped magnons intrinsic to metallic systems. Our results not only demonstrate that long-lived magnons in the THz regime can exist in bulk metallic systems, but they also open a path for an efficient search for metallic magnetic systems in which undamped THz magnons can be excited.
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Affiliation(s)
- G Poelchen
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043, Grenoble, France.
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062, Dresden, Germany.
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187, Dresden, Germany.
| | - J Hellwig
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438, Frankfurt am Main, Germany
| | - M Peters
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438, Frankfurt am Main, Germany
| | - D Yu Usachov
- Donostia International Physics Center (DIPC), 20018, Donostia-San Sebastián, Spain
| | - K Kliemt
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438, Frankfurt am Main, Germany
| | - C Laubschat
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062, Dresden, Germany
| | - P M Echenique
- Donostia International Physics Center (DIPC), 20018, Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48011, Bilbao, Spain
| | - E V Chulkov
- Donostia International Physics Center (DIPC), 20018, Donostia-San Sebastián, Spain
- Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU, 20018, Donostia-San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Facultad de Ciencias Químicas, Universidad del País Vasco UPV/EHU, 20080, Donostia-San Sebastián, Spain
| | - C Krellner
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438, Frankfurt am Main, Germany
| | - S S P Parkin
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
| | - D V Vyalikh
- Donostia International Physics Center (DIPC), 20018, Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48011, Bilbao, Spain
| | - A Ernst
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
- Institut für Theoretische Physik, Johannes Kepler Universität, 4040, Linz, Austria
| | - K Kummer
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043, Grenoble, France.
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3
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Usachov DY, Tarasov AV, Glazkova D, Mende M, Schulz S, Poelchen G, Fedorov AV, Vilkov OY, Bokai KA, Stolyarov VS, Kliemt K, Krellner C, Vyalikh DV. Insight into the Temperature-Dependent Canting of 4f Magnetic Moments from 4f Photoemission. J Phys Chem Lett 2023:5537-5545. [PMID: 37294735 DOI: 10.1021/acs.jpclett.3c01276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The orientation of the 4f moments offers an additional degree of freedom for engineering the spin-related properties in spintronic nanostructures of lanthanides. Yet, precise monitoring of the direction of magnetic moments remains a challenge. Here, on the example of the antiferromagnets HoRh2Si2 and DyRh2Si2, we investigate the temperature-dependent canting of the 4f moments near the surface. We demonstrate that this canting can be understood in the framework of crystal electric field theory and the exchange magnetic interaction. Using photoelectron spectroscopy, we disclose subtle but certain temperature-dependent changes in the line shape of the 4f multiplet. These changes are directly linked to the canting of the 4f moments, which is different for the individual lanthanide layers near the surface. Our results illustrate the opportunity to monitor the orientation of the 4f-moments with high precision, which is essential for development of novel lanthanide-based nanostructures, interfaces, supramolecular complexes, and single-molecule magnets for various applications.
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Affiliation(s)
- D Yu Usachov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
- Moscow Institute of Physics and Technology, Institute Lane 9, Dolgoprudny, 141701, Russia
- National University of Science and Technology MISIS, Moscow, 119049, Russia
| | - A V Tarasov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
- Moscow Institute of Physics and Technology, Institute Lane 9, Dolgoprudny, 141701, Russia
| | - D Glazkova
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - M Mende
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
| | - S Schulz
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
| | - G Poelchen
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
| | - A V Fedorov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin 12489, Germany
| | - O Yu Vilkov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - K A Bokai
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - V S Stolyarov
- Moscow Institute of Physics and Technology, Institute Lane 9, Dolgoprudny, 141701, Russia
- National University of Science and Technology MISIS, Moscow, 119049, Russia
- Dukhov Research Institute of Automatics (VNIIA), Moscow, 127055, Russia
| | - K Kliemt
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - C Krellner
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - D V Vyalikh
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
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4
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Usachov DY, Glazkova D, Tarasov AV, Schulz S, Poelchen G, Bokai KA, Vilkov OY, Dudin P, Kummer K, Kliemt K, Krellner C, Vyalikh DV. Estimating the Orientation of 4f Magnetic Moments by Classical Photoemission. J Phys Chem Lett 2022; 13:7861-7869. [PMID: 35977384 DOI: 10.1021/acs.jpclett.2c02203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
To use efficiently the magnetic functionalities emerging at the surfaces or interfaces of novel lanthanides-based materials, there is a need for complementary methods to probe the atomic-layer resolved magnetic properties. Here, we show that 4f photoelectron spectroscopy is highly sensitive to the collective orientation of 4f magnetic moments and, thus, a powerful tool for characterizing the related properties. To demonstrate this, we present the results of systematic study of a family of layered crystalline 4f-materials, which are crystallized in the body-centered tetragonal ThCr2Si2 structure. Analysis of 4f spectra indicates that the 4f moments at the surface experience a strong reorientation with respect to the bulk, caused by changes of the crystal-electric field. The presented database of the computed 4f spectra for all trivalent rare-earth ions in their different MJ states will facilitate the estimation of the orientation of the 4f magnetic moments in the layered 4f-systems for efficient control of their magnetic properties.
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Affiliation(s)
- Dmitry Yu Usachov
- St. Petersburg State University, 7/9 Universitetskaya nab, St. Petersburg 199034, Russia
| | - Daria Glazkova
- St. Petersburg State University, 7/9 Universitetskaya nab, St. Petersburg 199034, Russia
| | - Artem V Tarasov
- St. Petersburg State University, 7/9 Universitetskaya nab, St. Petersburg 199034, Russia
| | - Susanne Schulz
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - Georg Poelchen
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France
| | - Kirill A Bokai
- St. Petersburg State University, 7/9 Universitetskaya nab, St. Petersburg 199034, Russia
| | - Oleg Yu Vilkov
- St. Petersburg State University, 7/9 Universitetskaya nab, St. Petersburg 199034, Russia
| | - Pavel Dudin
- Synchrotron-SOLEIL, Saint-Aubin, BP48, 91192 Gif-sur-Yvette, France
| | - Kurt Kummer
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France
| | - Kristin Kliemt
- Kristall-und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - Cornelius Krellner
- Kristall-und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - Denis V Vyalikh
- Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
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5
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Windsor YW, Lee SE, Zahn D, Borisov V, Thonig D, Kliemt K, Ernst A, Schüßler-Langeheine C, Pontius N, Staub U, Krellner C, Vyalikh DV, Eriksson O, Rettig L. Exchange scaling of ultrafast angular momentum transfer in 4f antiferromagnets. NATURE MATERIALS 2022; 21:514-517. [PMID: 35210586 PMCID: PMC9064787 DOI: 10.1038/s41563-022-01206-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Ultrafast manipulation of magnetism bears great potential for future information technologies. While demagnetization in ferromagnets is governed by the dissipation of angular momentum1-3, materials with multiple spin sublattices, for example antiferromagnets, can allow direct angular momentum transfer between opposing spins, promising faster functionality. In lanthanides, 4f magnetic exchange is mediated indirectly through the conduction electrons4 (the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction), and the effect of such conditions on direct spin transfer processes is largely unexplored. Here, we investigate ultrafast magnetization dynamics in 4f antiferromagnets and systematically vary the 4f occupation, thereby altering the magnitude of the RKKY coupling energy. By combining time-resolved soft X-ray diffraction with ab initio calculations, we find that the rate of direct transfer between opposing moments is directly determined by this coupling. Given the high sensitivity of RKKY to the conduction electrons, our results offer a useful approach for fine tuning the speed of magnetic devices.
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Affiliation(s)
- Y W Windsor
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Berlin, Germany.
| | - S-E Lee
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Berlin, Germany
| | - D Zahn
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Berlin, Germany
| | - V Borisov
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
| | - D Thonig
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
- School of Science and Technology, Örebro University, Örebro, Sweden
| | - K Kliemt
- Physikalisches Institut, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
| | - A Ernst
- Institute for Theoretical Physics, Johannes Kepler University, Linz, Austria
- Max-Planck-Institut für Mikrostrukturphysik, Halle (Saale), Germany
| | | | - N Pontius
- Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany
| | - U Staub
- Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland
| | - C Krellner
- Physikalisches Institut, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
| | - D V Vyalikh
- Donostia International Physics Center (DIPC), Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - O Eriksson
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
- School of Science and Technology, Örebro University, Örebro, Sweden
| | - L Rettig
- Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Berlin, Germany.
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6
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Poelchen G, Rusinov IP, Schulz S, Güttler M, Mende M, Generalov A, Usachov DY, Danzenbächer S, Hellwig J, Peters M, Kliemt K, Kucherenko Y, Antonov VN, Laubschat C, Chulkov EV, Ernst A, Kummer K, Krellner C, Vyalikh DV. Interlayer Coupling of a Two-Dimensional Kondo Lattice with a Ferromagnetic Surface in the Antiferromagnet CeCo 2P 2. ACS NANO 2022; 16:3573-3581. [PMID: 35156797 DOI: 10.1021/acsnano.1c10705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The f-driven temperature scales at the surfaces of strongly correlated materials have increasingly come into the focus of research efforts. Here, we unveil the emergence of a two-dimensional Ce Kondo lattice, which couples ferromagnetically to the ordered Co lattice below the P-terminated surface of the antiferromagnet CeCo2P2. In its bulk, Ce is passive and behaves tetravalently. However, because of symmetry breaking and an effective magnetic field caused by an uncompensated ferromagnetic Co layer, the Ce 4f states become partially occupied and spin-polarized near the surface. The momentum-resolved photoemission measurements indicate a strong admixture of the Ce 4f states to the itinerant bands near the Fermi level including surface states that are split by exchange interaction with Co. The temperature-dependent measurements reveal strong changes of the 4f intensity at the Fermi level in accordance with the Kondo scenario. Our findings show how rich and diverse the f-driven properties can be at the surface of materials without f-physics in the bulk.
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Affiliation(s)
- Georg Poelchen
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble, France
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | - Igor P Rusinov
- Tomsk State University, 634050 Tomsk, Russia
- St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia
| | - Susanne Schulz
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | - Monika Güttler
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | - Max Mende
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | | | - Dmitry Yu Usachov
- St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia
| | - Steffen Danzenbächer
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | - Johannes Hellwig
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438 Frankfurt am Main, Germany
| | - Marius Peters
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438 Frankfurt am Main, Germany
| | - Kristin Kliemt
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438 Frankfurt am Main, Germany
| | - Yuri Kucherenko
- G. V. Kurdyumov Institute for Metal Physics, National Academy of Science of Ukraine, 03142 Kiev, Ukraine
| | - Victor N Antonov
- G. V. Kurdyumov Institute for Metal Physics, National Academy of Science of Ukraine, 03142 Kiev, Ukraine
| | - Clemens Laubschat
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | - Evgueni V Chulkov
- St. Petersburg State University, 7/9 Universitetskaya nab., 199034 St. Petersburg, Russia
- Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU, 20018 Donostia-San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Facultad de Ciencias Químicas, Universidad del País Vasco UPV/EHU, 20080 Donostia-San Sebastián, Spain
- Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Spain
| | - Arthur Ernst
- Institut für Theoretische Physik, Johannes Kepler Universität, 4040 Linz, Austria
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - Kurt Kummer
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble, France
| | - Cornelius Krellner
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, 60438 Frankfurt am Main, Germany
| | - Denis V Vyalikh
- Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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7
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Usachov DY, Nechaev IA, Poelchen G, Güttler M, Krasovskii EE, Schulz S, Generalov A, Kliemt K, Kraiker A, Krellner C, Kummer K, Danzenbächer S, Laubschat C, Weber AP, Sánchez-Barriga J, Chulkov EV, Santander-Syro AF, Imai T, Miyamoto K, Okuda T, Vyalikh DV. Cubic Rashba Effect in the Surface Spin Structure of Rare-Earth Ternary Materials. PHYSICAL REVIEW LETTERS 2020; 124:237202. [PMID: 32603174 DOI: 10.1103/physrevlett.124.237202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/13/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Spin-orbit interaction and structure inversion asymmetry in combination with magnetic ordering is a promising route to novel materials with highly mobile spin-polarized carriers at the surface. Spin-resolved measurements of the photoemission current from the Si-terminated surface of the antiferromagnet TbRh_{2}Si_{2} and their analysis within an ab initio one-step theory unveil an unusual triple winding of the electron spin along the fourfold-symmetric constant energy contours of the surface states. A two-band k·p model is presented that yields the triple winding as a cubic Rashba effect. The curious in-plane spin-momentum locking is remarkably robust and remains intact across a paramagnetic-antiferromagnetic transition in spite of spin-orbit interaction on Rh atoms being considerably weaker than the out-of-plane exchange field due to the Tb 4f moments.
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Affiliation(s)
- D Yu Usachov
- St. Petersburg State University, 7/9 Universitetskaya Naberezhnaya, St. Petersburg, 199034, Russia
| | - I A Nechaev
- Department of Electricity and Electronics, FCT-ZTF, UPV-EHU, 48080 Bilbao, Spain
| | - G Poelchen
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - M Güttler
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - E E Krasovskii
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- Departamento de Física de Materiales UPV/EHU, 20080 Donostia/San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - S Schulz
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - A Generalov
- Max IV Laboratory, Lund University, Box 118, 22100 Lund, Sweden
| | - K Kliemt
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - A Kraiker
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - C Krellner
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - K Kummer
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble, France
| | - S Danzenbächer
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - C Laubschat
- Institut für Festkörperphysik und Materialphysik, Technische Universität Dresden, D-01062 Dresden, Germany
| | - A P Weber
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
| | - J Sánchez-Barriga
- Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - E V Chulkov
- St. Petersburg State University, 7/9 Universitetskaya Naberezhnaya, St. Petersburg, 199034, Russia
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- Departamento de Física de Materiales UPV/EHU, 20080 Donostia/San Sebastián, Basque Country, Spain
- Centro de Física de Materiales CFM-MPC and Centro Mixto CSIC-UPV/EHU, 20018 Donostia/San Sebastián, Basque Country, Spain
- Tomsk State University, Lenina Avenue 36, 634050, Tomsk, Russia
| | - A F Santander-Syro
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405, Orsay, France
| | - T Imai
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - K Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - T Okuda
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - D V Vyalikh
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
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Ovchinnikov A, Bobev S. Bismuth as a Reactive Solvent in the Synthesis of Multicomponent Transition-Metal-Bearing Bismuthides. Inorg Chem 2019; 59:3459-3470. [DOI: 10.1021/acs.inorgchem.9b02881] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Ovchinnikov
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
- Department of Materials and Environmental Chemistry, Stockholm University, Arrhenius väg 16C, Svante 10691, Sweden
| | - Svilen Bobev
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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