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Larsson ED, Veryazov V. An embedded cluster CASPT2 study of the Ce:YVO4 spectrum. J Chem Phys 2023; 159:114117. [PMID: 37724731 DOI: 10.1063/5.0159246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/28/2023] [Indexed: 09/21/2023] Open
Abstract
Multiconfigurational theory, in combination with the embedded cluster approach, is a precise and ab initio approach to describe the electronic structure of solids. In this work, the spectrum of a Ce(III) dopant in YVO4 has been studied by complete active space perturbation theory of the second order (CASPT2), with the host material represented as a set of ab initio model potentials and point-charges. We assess the sensitivity of the spectrum to the size of both the embedded cluster size as well as the size of the electronic basis set. A comparison of our best computational model with experimental results shows that the embedding approach is robust and can accurately model the spectrum of low-concentration dopants in complex host materials.
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Affiliation(s)
- Ernst D Larsson
- Division of Theoretical Chemistry, Lund University, Lund 22100, Sweden
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Valera Veryazov
- Division of Theoretical Chemistry, Lund University, Lund 22100, Sweden
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Ray A, Maitra T. Nature of transport gap and magnetic order in zircon and scheelite type DyCrO4 from first principles. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:105501. [PMID: 25706816 DOI: 10.1088/0953-8984/27/10/105501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Our first principles density functional theory calculations within GGA + U approximation reveal that the nature of transport gaps in the zircon and scheelite phases of DyCrO(4) are quite different. While in the scheelite phase the origin of the gap is more like that of the Mott-Hubbard systems, in the zircon phase the origin is not strictly a Mott-Hubbard or a charge transfer type. In the framework of the Zaanen-Sawatsky-Allen phase diagram, the DyCrO(4) in its zircon phase could be placed in the intermediate regime between the charge transfer and Mott-Hubbard insulators. On the issue of ground state magnetic order in these two phases, where no consensus exists so far from experimental observations, we have performed GGA and GGA + U calculations on various possible magnetic configurations. We clearly establish from our theoretical calculations that the ferrimagnetic order, where ferromagnetic Dy and Cr sublattice are aligned antiparallel to each other, is the ground state in the zircon phase, while in the scheelite phase competing long-range antiferromagnetic orders are observed. Our estimation of various superexchange interactions indicate that competing ferro- and antiferro-magnetic interactions exist which would explain the experimental observation of metamagnetic transitions on application of a small external magnetic field in these systems.
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Affiliation(s)
- Avijeet Ray
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
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Cavalli E, Angiuli F, Mezzadri F, Trevisani M, Bettinelli M, Boutinaud P, Brik MG. Tunable luminescence of Bi(3+)-doped YP(x)V(1-x)O4 (0 ≤ x ≤1). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:385503. [PMID: 25186135 DOI: 10.1088/0953-8984/26/38/385503] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A systematic investigation of the luminescence spectroscopy of Y(P,V)O4:Bi(3+) is presented. The emission spectra and the decay curves are measured as a function of the host morphology, composition, temperature, excitation wavelength, and doping concentration. On this basis, the nature of the excited states and the radiative and non-radiative relaxation processes are discussed. Colour coordinates and quantum yield measurements are also carried out to provide information about the potential applications of the studied materials.
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Affiliation(s)
- Enrico Cavalli
- Department of Chemistry, University of Parma, Parma, Italy
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Swerts B, Chibotaru LF, Lindh R, Seijo L, Barandiaran Z, Clima S, Pierloot K, Hendrickx MFA. Embedding Fragment ab Initio Model Potentials in CASSCF/CASPT2 Calculations of Doped Solids: Implementation and Applications. J Chem Theory Comput 2008; 4:586-94. [DOI: 10.1021/ct7003148] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ben Swerts
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Liviu F. Chibotaru
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Roland Lindh
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Luis Seijo
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Zoila Barandiaran
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Sergiu Clima
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Kristin Pierloot
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Marc F. A. Hendrickx
- Division of Quantum and Physical Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium, Department of Theoretical Chemistry, Chemical Center, Lund University, P.O. Box 124, 221 00 Lund, Sweden, and Departamento de Química, C-14, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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