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Albino A, Benci S, Atzori M, Chelazzi L, Ciattini S, Taschin A, Bartolini P, Lunghi A, Righini R, Torre R, Totti F, Sessoli R. Temperature Dependence of Spin-Phonon Coupling in [VO(acac) 2]: A Computational and Spectroscopic Study. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:22100-22110. [PMID: 34676019 PMCID: PMC8521520 DOI: 10.1021/acs.jpcc.1c06916] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/08/2021] [Indexed: 06/13/2023]
Abstract
Molecular electronic spins are good candidates as qubits since they are characterized by a large tunability of their electronic and magnetic properties through a rational chemical design. Coordination compounds of light transition metals are promising systems for spin-based quantum information technologies, thanks to their long spin coherence times up to room temperature. Our work aims at presenting an in-depth study on how the spin-phonon coupling in vanadyl-acetylacetonate, [VO(acac)2], can change as a function of temperature using terahertz time-domain spectroscopy and density functional theory (DFT) calculations. Powder THz spectra were recorded between 10 and 300 K. The temperature dependence of vibrational frequencies was then accounted for in the periodic DFT calculations using unit-cell parameters measured at two different temperatures and the optimized ones, as usually reported in the literature. In this way, it was possible to calculate the observed THz anharmonic frequency shift with high accuracy. The overall differences in the spin-phonon coupling magnitudes as a function of temperature were also highlighted showing that the computed trends have to be ascribed to the anisotropic variation of cell parameters.
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Affiliation(s)
- Andrea Albino
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU, Universitá degli Studi di Firenze, Via della Lastruccia 3, Sesto
Fiorentino, Florence 50019, Italy
| | - Stefano Benci
- European
Laboratory for Non-Linear Spectroscopy (LENS), Universitá degli Studi di Firenze, Sesto Fiorentino, Florence 50019, Italy
| | - Matteo Atzori
- Laboratoire
National des Champs Magnétiques Intenses (LNCMI), Univ. Grenoble Alpes, INSA Toulouse, Univ. Toulouse
Paul Sabatier, EMFL, CNRS, F38043 Grenoble, France
| | - Laura Chelazzi
- Dipartimento
di Chimica “Ugo Schiff” & Center of Crystallography, Universitá degli Studi di Firenze, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019, Italy
| | - Samuele Ciattini
- Dipartimento
di Chimica “Ugo Schiff” & Center of Crystallography, Universitá degli Studi di Firenze, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019, Italy
| | - Andrea Taschin
- European
Laboratory for Non-Linear Spectroscopy (LENS), Universitá degli Studi di Firenze, Sesto Fiorentino, Florence 50019, Italy
- ENEA,
Agenzia nazionale per le nuove tecnologie, l’energia e lo sviluppo
economico sostenibile, Centro Ricerche Frascati, via Enrico Fermi 45, 00044 Frascati, Roma, Italy
| | - Paolo Bartolini
- European
Laboratory for Non-Linear Spectroscopy (LENS), Universitá degli Studi di Firenze, Sesto Fiorentino, Florence 50019, Italy
| | - Alessandro Lunghi
- School of
Physics, AMBER and CRANN Institute, Trinity
College, Dublin 2, Ireland
| | - Roberto Righini
- European
Laboratory for Non-Linear Spectroscopy (LENS), Universitá degli Studi di Firenze, Sesto Fiorentino, Florence 50019, Italy
| | - Renato Torre
- European
Laboratory for Non-Linear Spectroscopy (LENS), Universitá degli Studi di Firenze, Sesto Fiorentino, Florence 50019, Italy
- Dipartimento
di Fisica ed Astronomia, Universitá
degli Studi di Firenze, Via G. Sansone 1, Sesto Fiorentino, Florence 50019, Italy
| | - Federico Totti
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU, Universitá degli Studi di Firenze, Via della Lastruccia 3, Sesto
Fiorentino, Florence 50019, Italy
| | - Roberta Sessoli
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU, Universitá degli Studi di Firenze, Via della Lastruccia 3, Sesto
Fiorentino, Florence 50019, Italy
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