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González-Ruano C, Caso D, Ouassou JA, Tiusan C, Lu Y, Linder J, Aliev FG. Observation of Magnetic State Dependent Thermoelectricity in Superconducting Spin Valves. PHYSICAL REVIEW LETTERS 2023; 130:237001. [PMID: 37354396 DOI: 10.1103/physrevlett.130.237001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/03/2023] [Accepted: 05/08/2023] [Indexed: 06/26/2023]
Abstract
Superconductor-ferromagnet tunnel junctions demonstrate giant thermoelectric effects that are being exploited to engineer ultrasensitive terahertz radiation detectors. Here, we experimentally observe the recently predicted complete magnetic control over thermoelectric effects in a superconducting spin valve, including the dependence of its sign on the magnetic state of the spin valve. The description of the experimental results is improved by the introduction of an interfacial domain wall in the spin filter layer interfacing the superconductor. Surprisingly, the application of high in-plane magnetic fields induces a double sign inversion of the thermoelectric effect, which exhibits large values even at applied fields twice the superconducting critical field.
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Affiliation(s)
- César González-Ruano
- Departamento Física de la Materia Condensada C-III, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Diego Caso
- Departamento Física de la Materia Condensada C-III, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Jabir Ali Ouassou
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, NO-M7T9Q Trondheim, Norway
| | - Coriolan Tiusan
- Department of Solid State Physics and Advanced Technologies, Faculty of Physics, Babes-Bolyai University, Cluj Napoca 400114, Romania
- Institut Jean Lamour, Nancy Universitè, 54506 Vandoeuvre-les-Nancy Cedex, France
| | - Yuan Lu
- Institut Jean Lamour, Nancy Universitè, 54506 Vandoeuvre-les-Nancy Cedex, France
| | - Jacob Linder
- Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, NO-M7T9Q Trondheim, Norway
| | - Farkhad G Aliev
- Departamento Física de la Materia Condensada C-III, Instituto Nicolás Cabrera (INC) and Condensed Matter Physics Institute (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
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Computing the Properties of Materials from First Principles with SIESTA. STRUCTURE AND BONDING 2012. [DOI: 10.1007/b97943] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3
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Dedkov YS, Laubschat C, Khmelevskyi S, Redinger J, Mohn P, Weinert M. YCo2: intrinsic magnetic surface of a paramagnetic bulk material. PHYSICAL REVIEW LETTERS 2007; 99:047204. [PMID: 17678398 DOI: 10.1103/physrevlett.99.047204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2007] [Indexed: 05/16/2023]
Abstract
Here we report on results of a spin-resolved photoelectron spectroscopic (SRPES) study of YCo2 thin films (150 A-thick) grown on a W(110) substrate. The films were prepared by co-deposition of stoichiometric amounts of Y and Co onto a clean W surface followed by thermal annealing leading to (2x2) overstructure with respect to W(110) in the low-energy electron diffraction pattern indicated formation of a structurally ordered YCo2(111) surface. While no clear spin asymmetry was observed for bulk-sensitive SRPES data taken at hnu=1253.6 eV, the more surface-sensitive SRPES data obtained at hnu=21.2 eV photon energy revealed a clear spin-asymmetry probing the validity of the recent theoretical prediction.
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Affiliation(s)
- Yu S Dedkov
- Institut für Festkörperphysik, Technische Universität Dresden, 01062 Dresden, Germany
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Khmelevskyi S, Mohn P, Redinger J, Weinert M. Magnetism on the surface of the bulk paramagnetic intermetallic compound YCo2. PHYSICAL REVIEW LETTERS 2005; 94:146403. [PMID: 15904086 DOI: 10.1103/physrevlett.94.146403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2004] [Indexed: 05/02/2023]
Abstract
Using full-potential electronic structure calculations, we predict that the (111) surface of the cubic Laves phase Pauli paramagnet YCo2 is ferromagnetic. The magnetism of the (111) surface is independent of the termination of the surface, does not extend beyond two Co layers, and is related to the field-induced metamagnetism of the bulk. YCo2 appears to be a prominent candidate to demonstrate the phenomenon of surface-induced itinerant magnetism localized in two dimensions.
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Affiliation(s)
- S Khmelevskyi
- Institut für Allgemeine Physik and Center for Computational Materials Science, Vienna University of Technology, Getreidemarkt 9/134, A-1060 Vienna, Austria
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Li S, Alemany MMG, Chelikowsky JR. Ab initio calculations for the photoelectron spectra of vanadium clusters. J Chem Phys 2004; 121:5893-8. [PMID: 15367017 DOI: 10.1063/1.1785142] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report ab initio calculations for the electronic and structural properties of V(n), V(n) (-), and V(n) (+) clusters up to n=8. We performed the calculations using a real-space pseudopotential method based on the local spin density approximation for exchange and correlation. This method assumes no explicit basis. Wave functions are evaluated on a uniform grid; only one parameter, the grid spacing, is used to control convergence of the electronic properties. Charged states are easily handled in real space, in contrast to methods based on supercells where Coulombic divergences require special handling. For each size and charge state, we find the lowest energy structure. Our results for the photoelectron spectra, using the optimized structure, agree well with those obtained by experiment. We also obtain satisfactory agreement with the measured ionization potential and electron affinity, and compare our results to calculations using an explicit basis.
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Affiliation(s)
- Shen Li
- Department of Chemical Engineering and Materials Science, Institute for the Theory of Advanced Materials in Information Technology, Digital Technology Center, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Iseda M, Nishio T, Han SY, Yoshida H, Terasaki A, Kondow T. Electronic structure of vanadium cluster anions as studied by photoelectron spectroscopy. J Chem Phys 1997. [DOI: 10.1063/1.473785] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Koike K, Furukawa T. Evidence for Ferromagnetic Order at the FeO(111) Surface. PHYSICAL REVIEW LETTERS 1996; 77:3921-3924. [PMID: 10062342 DOI: 10.1103/physrevlett.77.3921] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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8
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Beckmann H, Ye F, Bergmann G. Weak antiferromagnetism of monolayers and multilayers of V on Au films. PHYSICAL REVIEW LETTERS 1994; 73:1715-1718. [PMID: 10056865 DOI: 10.1103/physrevlett.73.1715] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Walker TG, Hopster H. Induced magnetic order in ultrathin vanadium films on Fe(100). PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:7687-7690. [PMID: 10009514 DOI: 10.1103/physrevb.49.7687] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Vega A, Balbás LC, Nait-Laziz H, Demangeat C, Dreyssé H. Spin polarization at the Fe/V interface. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:985-992. [PMID: 10007957 DOI: 10.1103/physrevb.48.985] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ortega JE, Himpsel FJ. Inverse photoemission from V, Cr, Mn, Fe, and Co monolayers on Ag(100). PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:16441-16446. [PMID: 10006076 DOI: 10.1103/physrevb.47.16441] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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12
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Hübner W, Falicov LM. Theory of spin-polarized electron-capture spectroscopy in ferromagnetic nickel. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8783-8793. [PMID: 10004923 DOI: 10.1103/physrevb.47.8783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dorantes-Davila J, Dreyssé H. Magnetic behavior of small vanadium clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:3857-3863. [PMID: 10006494 DOI: 10.1103/physrevb.47.3857] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Fasolino A, Carra P, Altarelli M. X-ray resonant magnetic scattering from surfaces. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:3877-3881. [PMID: 10006497 DOI: 10.1103/physrevb.47.3877] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bouarab S, Nait-Laziz H, Demangeat C, Mokrani A, Dreyssé H. Spin-polarized electronic structure of vanadium. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:889-897. [PMID: 10003274 DOI: 10.1103/physrevb.46.889] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Binns C, Derbyshire HS, Bayliss SC, Norris C. Appearance of surface magnetic moments on vanadium thin films and sensitivity to contamination. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:460-463. [PMID: 10000201 DOI: 10.1103/physrevb.45.460] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mokrani A, Demangeat C, Dreyssé H. Condition for the appearance of a live magnetic layer on paramagnetic pure transition metals. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:10319-10321. [PMID: 9995293 DOI: 10.1103/physrevb.42.10319] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Baquero R, Noguera A, Camacho A, Quiroga L. Local density of states for transition-metal interfaces. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:7006-7014. [PMID: 9994824 DOI: 10.1103/physrevb.42.7006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zhu MJ, Bylander DM, Kleinman L. Ferromagnetic properties of Pd monolayers. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:2874-2877. [PMID: 9995776 DOI: 10.1103/physrevb.42.2874] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Fink RL, Ballentine CA, Erskine JL, Araya-Pochet JA. Experimental probe for thin-film magnetism in p(1 x 1) Pd and V on Ag(100). PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:10175-10178. [PMID: 9993404 DOI: 10.1103/physrevb.41.10175] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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21
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Ferromagnetic order and critical behavior at surfaces of ultrathin epitaxial films. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf00616983] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Moodera JS, Meservey R. Exchange interactions of quench-condensed vanadium atoms on metal surfaces. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:8541-8544. [PMID: 9991323 DOI: 10.1103/physrevb.40.8541] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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Lee CH, He H, Lamelas F, Vavra W, Uher C, Clarke R. Epitaxial Co-Au superlattices. PHYSICAL REVIEW LETTERS 1989; 62:653-656. [PMID: 10040294 DOI: 10.1103/physrevlett.62.653] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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24
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Winter H, Hagedorn H, Zimny R, Nienhaus H, Kirschner J. Polarized light emission after grazing ion-surface scattering due to capture of spin-polarized electrons. PHYSICAL REVIEW LETTERS 1989; 62:296-299. [PMID: 10040196 DOI: 10.1103/physrevlett.62.296] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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25
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O'Neill DG, Weaver JH. Evolution of the electronic structure of the Cr/Au(001) interface. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:8122-8129. [PMID: 9944143 DOI: 10.1103/physrevb.37.8122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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26
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Stadnik ZM, Griesbach P, Dehe G, Gütlich P, Kohara T, Stroink G. 61Ni Mössbauer study of the hyperfine magnetic field near the Ni surface. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 35:6588-6592. [PMID: 9940904 DOI: 10.1103/physrevb.35.6588] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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27
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Drube W, Himpsel FJ. Minority-spin states for V and Mn on Ag(111) by inverse photoemission. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 35:4131-4133. [PMID: 9941952 DOI: 10.1103/physrevb.35.4131] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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