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Redka D, Khan SA, Martino E, Mettan X, Ciric L, Tolj D, Ivšić T, Held A, Caputo M, Guedes EB, Strocov VN, Di Marco I, Ebert H, Huber HP, Dil JH, Forró L, Minár J. Interplay between disorder and electronic correlations in compositionally complex alloys. Nat Commun 2024; 15:7983. [PMID: 39266550 PMCID: PMC11393320 DOI: 10.1038/s41467-024-52349-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 09/03/2024] [Indexed: 09/14/2024] Open
Abstract
Owing to their exceptional mechanical, electronic, and phononic transport properties, compositionally complex alloys, including high-entropy alloys, represent an important class of materials. However, the interplay between chemical disorder and electronic correlations, and its influence on electronic structure-derived properties, remains largely unexplored. This is addressed for the archetypal CrMnFeCoNi alloy using resonant and valence band photoemission spectroscopy, electrical resistivity, and optical conductivity measurements, complemented by linear response calculations based on density functional theory. Utilizing dynamical mean-field theory, correlation signatures and damping in the spectra are identified, highlighting the significance of many-body effects, particularly in states distant from the Fermi edge. Electronic transport remains dominated by disorder and potentially short-range order, especially at low temperatures, while visible-spectrum optical conductivity and high-temperature transport are influenced by short quasiparticle lifetimes. These findings improve our understanding of element-specific electronic correlations in compositionally complex alloys and facilitate the development of advanced materials with tailored electronic properties.
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Affiliation(s)
- David Redka
- New Technologies Research Center, University of West Bohemia, Plzen, Czech Republic
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences HM, Munich, Germany
| | - Saleem Ayaz Khan
- New Technologies Research Center, University of West Bohemia, Plzen, Czech Republic
| | - Edoardo Martino
- Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Xavier Mettan
- Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Luka Ciric
- Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Davor Tolj
- Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Trpimir Ivšić
- Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Department of Physical Chemistry, Ruđer Bošković Institute, Zagreb, Croatia
| | - Andreas Held
- Department of Chemistry, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Marco Caputo
- Photon Science Division, Paul Scherrer Institut, Villigen, Switzerland
| | | | | | - Igor Di Marco
- Institute of Physics, Nicolaus Copernicus University, Toruń, Poland
- Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
| | - Hubert Ebert
- Department of Chemistry, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Heinz P Huber
- New Technologies Research Center, University of West Bohemia, Plzen, Czech Republic.
- Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences HM, Munich, Germany.
| | - J Hugo Dil
- Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Photon Science Division, Paul Scherrer Institut, Villigen, Switzerland
| | - László Forró
- Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Stavropoulos Center for Complex Quantum Matter, Department of Physics and Astronomy, University of Notre Dame, Notre Dame, IN, USA
| | - Ján Minár
- New Technologies Research Center, University of West Bohemia, Plzen, Czech Republic.
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Barwiolek M, Jankowska D, Kaczmarek-Kędziera A, Lakomska I, Kobylarczyk J, Podgajny R, Popielarski P, Masternak J, Witwicki M, Muzioł TM. New Dinuclear Macrocyclic Copper(II) Complexes as Potentially Fluorescent and Magnetic Materials. Int J Mol Sci 2023; 24:3017. [PMID: 36769351 PMCID: PMC9918273 DOI: 10.3390/ijms24033017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/09/2023] Open
Abstract
Two dinuclear copper(II) complexes with macrocyclic Schiff bases K1 and K2 were prepared by the template reaction of (R)-(+)-1,1'-binaphthalene-2,2'-diamine and 2-hydroxy-5-methyl-1,3-benzenedicarboxaldehyde K1, or 4-tert-butyl-2,6-diformylphenol K2 with copper(II) chloride dihydrate. The compounds were characterized by spectroscopic methods. X-ray crystal structure determination and DFT calculations confirmed their geometry in solution and in the solid phase. Moreover, intermolecular interactions in the crystal structure of K2 were analyzed using 3D Hirshfeld surfaces and the related 2D fingerprint plots. The magnetic study revealed very strong antiferromagnetic CuII-CuII exchange interactions, which were supported by magneto-structural correlation and DFT calculations conducted within a broken symmetry (BS) framework. Complexes K1 and K2 exhibited luminescent properties that may be of great importance in the search for new OLEDs. Both K1 and K2 complexes showed emissions in the range of 392-424 nm in solutions at various polarities. Thin materials of the studied compounds were deposited on Si(111) by the spin-coating method or by thermal vapor deposition and studied by scanning electron microscopy (SEM/EDS), atomic force microscopy (AFM), and fluorescence spectroscopy. The thermally deposited K1 and K2 materials showed high fluorescence intensity in the range of 318-531 nm for K1/Si and 326-472 nm for the K2/Si material, indicating that they could be used in optical devices.
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Affiliation(s)
- Magdalena Barwiolek
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 11, 87-100 Torun, Poland
| | - Dominika Jankowska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 11, 87-100 Torun, Poland
| | - Anna Kaczmarek-Kędziera
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 11, 87-100 Torun, Poland
| | - Iwona Lakomska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 11, 87-100 Torun, Poland
| | | | - Robert Podgajny
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - Paweł Popielarski
- Faculty of Physics, Kazimierz Wielki University, Powstancow Wielkopolskich 2, 85-090 Bydgoszcz, Poland
| | - Joanna Masternak
- Institute of Chemistry, Jan Kochanowski University of Kielce, Uniwersytecka 7, 25-406 Kielce, Poland
| | - Maciej Witwicki
- Faculty of Chemistry, University of Wrocław, Joliot Curie 14, 50-383 Wrocław, Poland
| | - Tadeusz M. Muzioł
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 11, 87-100 Torun, Poland
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Hamad IJ, Manuel LO, Aligia AA. Generalized One-Band Model Based on Zhang-Rice Singlets for Tetragonal CuO. PHYSICAL REVIEW LETTERS 2018; 120:177001. [PMID: 29756839 DOI: 10.1103/physrevlett.120.177001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Indexed: 06/08/2023]
Abstract
Tetragonal CuO (T-CuO) has attracted attention because of its structure similar to that of the cuprates. It has been recently proposed as a compound whose study can give an end to the long debate about the proper microscopic modeling for cuprates. In this work, we rigorously derive an effective one-band generalized t-J model for T-CuO, based on orthogonalized Zhang-Rice singlets, and make an estimative calculation of its parameters, based on previous ab initio calculations. By means of the self-consistent Born approximation, we then evaluate the spectral function and the quasiparticle dispersion for a single hole doped in antiferromagnetically ordered half filled T-CuO. Our predictions show very good agreement with angle-resolved photoemission spectra and with theoretical multiband results. We conclude that a generalized t-J model remains the minimal Hamiltonian for a correct description of single-hole dynamics in cuprates.
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Affiliation(s)
- I J Hamad
- Instituto de Física Rosario (CONICET) and Universidad Nacional de Rosario, Boulevard 27 de Febrero 210 bis, 2000 Rosario, Argentina
| | - L O Manuel
- Instituto de Física Rosario (CONICET) and Universidad Nacional de Rosario, Boulevard 27 de Febrero 210 bis, 2000 Rosario, Argentina
| | - A A Aligia
- Centro Atómico Bariloche and Instituto Balseiro, CNEA, CONICET, 8400 Bariloche, Argentina
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