Spin–phonon couplings in transition metal complexes with slow magnetic relaxation

Moseley, Duncan H.; Stavretis, Shelby E.; Thirunavukkuarasu, Komalavalli; Ozerov, Mykhaylo; Cheng, Yongqiang; Daemen, Luke L.; Ludwig, Jonathan; Lu, Zhengguang; Smirnov, Dmitry; Brown, Craig M.; Pandey, Anup; Ramirez-Cuesta, A. J.; Lamb, Adam C.; Atanasov, Mihail; Bill, Eckhard; Neese, Frank; Xue, Zi-Ling

doi:10.1038/s41467-018-04896-0

Title: Spin–phonon couplings in transition metal complexes with slow magnetic relaxation

Journal Article · Tue Jul 03 00:00:00 EDT 2018 · Nature Communications

DOI:https://doi.org/10.1038/s41467-018-04896-0· OSTI ID:1468922

^[1]; Stavretis, Shelby E. ^[1];

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^[3]; Cheng, Yongqiang ^[4]; Daemen, Luke L. ^[4]; Ludwig, Jonathan ^[3]; Lu, Zhengguang ^[3];

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^[5]; Pandey, Anup ^[4];

^[4]; Lamb, Adam C. ^[1];

^[6];

^[7]; Neese, Frank ^[8];

^[1]

Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
Florida A&M Univ., Tallahassee, FL (United States). Dept. of Physics
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS), Chemical and Engineering Materials Division
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
Max Planck Inst. for Coal Research, Mülheim, (Germany); Bulgarian Academy of Sciences, Sofia (Bulgaria). Inst. of General and Inorganic Chemistry
Max Planck Inst. for Chemical Energy Conversion, Mülheim (Germany)
Max Planck Inst. for Coal Research, Mülheim, (Germany)

Spin–phonon coupling plays an important role in single-molecule magnets and molecular qubits. However, there have been few detailed studies of its nature. Here in this paper, we show for the first time distinct couplings of g phonons of Co^II(acac)₂(H₂O)₂ (acac = acetylacetonate) and its deuterated analogs with zero-field-split, excited magnetic/spin levels (Kramers doublet (KD)) of the S = 3/2 electronic ground state. The couplings are observed as avoided crossings in magnetic-field-dependent Raman spectra with coupling constants of 1–2 cm^-1. Far-IR spectra reveal the magnetic-dipole-allowed, inter-KD transition, shifting to higher energy with increasing field. Density functional theory calculations are used to rationalize energies and symmetries of the phonons. A vibronic coupling model, supported by electronic structure calculations, is proposed to rationalize the behavior of the coupled Raman peaks. In conclusion, this work spectroscopically reveals and quantitates the spin–phonon couplings in typical transition metal complexes and sheds light on the origin of the spin–phonon entanglement.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; National Science Foundation (NSF)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1468922

Journal Information:: Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 77 works

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References (57)

Generalized Gradient Approximation Made Simple Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868 https://doi.org/10.1103/PhysRevLett.77.3865	journal	October 1996
Far infrared magnetic resonance in FeSiF ₆ ⋅6H ₂ O and Fe(SPh) ₄ ²⁻ Champion, P. M.; Sievers, A. J. The Journal of Chemical Physics, Vol. 66, Issue 5 https://doi.org/10.1063/1.434200	journal	March 1977
Electron-Phonon and Magnetoelastic Interactions in Ferromagnetic $Co [N (CN)_{2}]_{2}$ Brinzari, T. V.; Haraldsen, J. T.; Chen, P. Physical Review Letters, Vol. 111, Issue 4 https://doi.org/10.1103/PhysRevLett.111.047202	journal	July 2013
Projector augmented-wave method Blöchl, P. E. Physical Review B, Vol. 50, Issue 24, p. 17953-17979 https://doi.org/10.1103/PhysRevB.50.17953	journal	December 1994
Direct Observation of Very Large Zero-Field Splitting in a Tetrahedral Ni ^II Se ₄ Coordination Complex Jiang, Shang-Da; Maganas, Dimitrios; Levesanos, Nikolaos Journal of the American Chemical Society, Vol. 137, Issue 40 https://doi.org/10.1021/jacs.5b06716	journal	September 2015
Electronic Raman transitions from the vanadium(III) hexa-aqua cation, in guanidinium vanadium sulphate Spichiger, David; Carver, Graham; Dobe, Christopher Chemical Physics Letters, Vol. 337, Issue 4-6 https://doi.org/10.1016/S0009-2614(01)00220-2	journal	April 2001
Molecular magnets Blundell, Stephen J. Contemporary Physics, Vol. 48, Issue 5 https://doi.org/10.1080/00107510801967415	journal	September 2007
From ultrasoft pseudopotentials to the projector augmented-wave method Kresse, G.; Joubert, D. Physical Review B, Vol. 59, Issue 3, p. 1758-1775 https://doi.org/10.1103/PhysRevB.59.1758	journal	January 1999
Magneto-Structural Correlations in Pseudotetrahedral Forms of the [Co(SPh) ₄ ] ^2– Complex Probed by Magnetometry, MCD Spectroscopy, Advanced EPR Techniques, and ab Initio Electronic Structure Calculations Suturina, Elizaveta A.; Nehrkorn, Joscha; Zadrozny, Joseph M. Inorganic Chemistry, Vol. 56, Issue 5 https://doi.org/10.1021/acs.inorgchem.7b00097	journal	February 2017
Geometry-Mediated Enhancement of Single-Ion Anisotropy: A Route to Single-Molecule Magnets with a High Blocking Temperature Dey, Mamon; Gogoi, Nayanmoni Angewandte Chemie International Edition, Vol. 52, Issue 49 https://doi.org/10.1002/anie.201304982	journal	October 2013
(Fe,Ni)2P allabogdanite can be an ambient pressure phase in iron meteorites Litasov, Konstantin D.; Bekker, Tatyana B.; Sagatov, Nursultan E. Scientific Reports, Vol. 10, Issue 1 https://doi.org/10.1038/s41598-020-66039-0	journal	June 2020
Molecular magnetic hysteresis at 60 kelvin in dysprosocenium Goodwin, Conrad A. P.; Ortu, Fabrizio; Reta, Daniel Nature, Vol. 548, Issue 7668 https://doi.org/10.1038/nature23447	journal	August 2017
Exploiting single-ion anisotropy in the design of f-element single-molecule magnets Rinehart, Jeffrey D.; Long, Jeffrey R. Chemical Science, Vol. 2, Issue 11 https://doi.org/10.1039/c1sc00513h	journal	January 2011
First principles phonon calculations in materials science Togo, Atsushi; Tanaka, Isao arXiv https://doi.org/10.48550/arxiv.1506.08498	preprint	January 2015
Radical ligand-containing single-molecule magnets Demir, Selvan; Jeon, Ie-Rang; Long, Jeffrey R. Coordination Chemistry Reviews, Vol. 289-290 https://doi.org/10.1016/j.ccr.2014.10.012	journal	April 2015
Influence of Jahn−Teller Coupling on the Magnetic Properties of Transition Metal Complexes with Orbital Triplet Ground Terms: Magnetization and Electronic Raman Studies of the Titanium(III) Hexa-Aqua Cation Tregenna-Piggott, P. L. W.; Güdel, Hans-Ueli Inorganic Chemistry, Vol. 40, Issue 22 https://doi.org/10.1021/ic010277f	journal	October 2001
Far-infrared studies on hemin and hemin-like complexes Uenoyama, H. Biochimica et Biophysica Acta (BBA) - General Subjects, Vol. 230, Issue 3 https://doi.org/10.1016/0304-4165(71)90176-0	journal	March 1971
Frequency domain Fourier transform THz-EPR on single molecule magnets using coherent synchrotron radiation Schnegg, Alexander; Behrends, Jan; Lips, Klaus Physical Chemistry Chemical Physics, Vol. 11, Issue 31 https://doi.org/10.1039/b905745e	journal	January 2009
Single-Crystal Raman Spectroscopy of the Rubidium Alums RbM ^III (SO ₄ ) ₂ ·12H ₂ O (M ^III = Al, Ga, In, Ti, V, Cr, Fe) between 275 and 1200 cm ^- ¹ : Correlation between the Electronic Structure of the Tervalent Cation and Structural Abnormalities Tregenna-Piggott, Philip L. W.; Best, Stephen P. Inorganic Chemistry, Vol. 35, Issue 19 https://doi.org/10.1021/ic9602759	journal	January 1996
Chemical accuracy for the van der Waals density functional Klimes, J.; Bowler, D. R.; Michaelides, A. arXiv https://doi.org/10.48550/arxiv.0910.0438	preprint	January 2009
Electronic structure and magnetic properties of high-spin octahedral Co(II) complexes: Co(II)(acac)2(H2O)2 Lohr, Lawrence L.; Miller, Jeremy C.; Sharp, Robert R. The Journal of Chemical Physics, Vol. 111, Issue 22 https://doi.org/10.1063/1.480365	journal	December 1999
A four-coordinate cobalt(II) single-ion magnet with coercivity and a very high energy barrier Rechkemmer, Yvonne; Breitgoff, Frauke D.; Van Der Meer, Margarethe ETH Zurich https://doi.org/10.3929/ethz-b-000113730	text	January 2016
First-principles prediction of redox potentials in transition-metal compounds with LDA+U Zhou, Fei; Cococcioni, Matteo; Marianetti, Chris A. arXiv https://doi.org/10.48550/arxiv.cond-mat/0406382	text	January 2004
Variable temperature inelastic neutron scattering study of chromium(II) Tutton salt: manifestation of the 5E⊗e Jahn–Teller effect Dobe, Christopher; Andres, Hans-Peter; Tregenna-Piggott, Philip L. W. Chemical Physics Letters, Vol. 362, Issue 5-6 https://doi.org/10.1016/S0009-2614(02)01131-4	journal	August 2002
Electronic structure of AlFeN films exhibiting crystallographic orientation change from c- to a-axis with Fe concentrations and annealing effect Tatemizo, Nobuyuki; Imada, Saki; Okahara, Kizuna Scientific Reports, Vol. 10, Issue 1 https://doi.org/10.1038/s41598-020-58835-5	journal	February 2020
Electronic Raman spectroscopy of the vanadium(III) hexaaqua cation in guanidinium vanadium sulphate: Quintessential manifestation of the dynamical Jahn–Teller effect Carver, Graham; Spichiger, David; Tregenna-Piggott, Philip L. W. The Journal of Chemical Physics, Vol. 122, Issue 12 https://doi.org/10.1063/1.1872835	journal	March 2005
3d single-ion magnets Craig, Gavin A.; Murrie, Mark Chemical Society Reviews, Vol. 44, Issue 8 https://doi.org/10.1039/C4CS00439F	journal	January 2015
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set Kresse, G.; Furthmüller, J. Physical Review B, Vol. 54, Issue 16, p. 11169-11186 https://doi.org/10.1103/PhysRevB.54.11169	journal	October 1996
First principles phonon calculations in materials science Togo, Atsushi; Tanaka, Isao Scripta Materialia, Vol. 108 https://doi.org/10.1016/j.scriptamat.2015.07.021	journal	November 2015
Organometallic Single-Molecule Magnets Layfield, Richard A. Organometallics, Vol. 33, Issue 5 https://doi.org/10.1021/om401107f	journal	January 2014
Magnetic Transitions in Iron Porphyrin Halides by Inelastic Neutron Scattering and Ab Initio Studies of Zero-Field Splittings Stavretis, Shelby E.; Atanasov, Mihail; Podlesnyak, Andrey A. Inorganic Chemistry, Vol. 54, Issue 20 https://doi.org/10.1021/acs.inorgchem.5b01505	journal	October 2015
Comprehensive Spectroscopic Determination of the Crystal Field Splitting in an Erbium Single-Ion Magnet Rechkemmer, Yvonne; Fischer, Julia E.; Marx, Raphael Journal of the American Chemical Society, Vol. 137, Issue 40 https://doi.org/10.1021/jacs.5b08344	journal	September 2015
ESR spectra of low-symmetry high-spin cobalt(II) complexes. 6. 6-Methylquinoline, pyridine, and water adducts of cobalt(II) acetylacetonate Bencini, A.; Benelli, C.; Gatteschi, D. Inorganic Chemistry, Vol. 19, Issue 10 https://doi.org/10.1021/ic50212a037	journal	October 1980
Reducing Dzyaloshinskii-Moriya interaction and field-free spin-orbit torque switching in synthetic antiferromagnets Chen, Ruyi; Cui, Qirui; Liao, Liyang Nature Communications, Vol. 12, Issue 1 https://doi.org/10.1038/s41467-021-23414-3	journal	May 2021
Determining Key Local Vibrations in the Relaxation of Molecular Spin Qubits and Single-Molecule Magnets Escalera-Moreno, L.; Suaud, N.; Gaita-Ariño, A. The Journal of Physical Chemistry Letters, Vol. 8, Issue 7 https://doi.org/10.1021/acs.jpclett.7b00479	journal	March 2017
Quantum Tunneling of Magnetization and Related Phenomena in Molecular Materials Gatteschi, Dante; Sessoli, Roberta Angewandte Chemie International Edition, Vol. 42, Issue 3 https://doi.org/10.1002/anie.200390099	journal	January 2003
Origin of slow magnetic relaxation in Kramers ions with non-uniaxial anisotropy Gómez-Coca, Silvia; Urtizberea, Ainhoa; Cremades, Eduard Nature Communications, Vol. 5, Issue 1 https://doi.org/10.1038/ncomms5300	journal	July 2014
Molecular Magnets: Physics and Applications Bartolomé, Juan; Luis, Fernando; Fernández, Julio F. NanoScience and Technology https://doi.org/10.1007/978-3-642-40609-6	book	January 2014
An easy way to perdeuterated pyrazoles by catalytic exchange reactions Frediani, Piero; Rovai, Donella; Muniz-Miranda, Maurizio Catalysis Communications, Vol. 2, Issue 3-4 https://doi.org/10.1016/s1566-7367(01)00019-x	journal	July 2001
Structure and Bonding of the Vanadium(III) Hexa-Aqua Cation. 2. Manifestation of Dynamical Jahn−Teller Coupling in Axially Distorted Vanadium(III) Complexes Tregenna-Piggott, Philip L. W.; Carver, Graham Inorganic Chemistry, Vol. 43, Issue 25 https://doi.org/10.1021/ic049291t	journal	December 2004
The Electronic Ground State of [V(urea) ₆ ] ³⁺ Probed by NIR Luminescence, Electronic Raman, and High-Field EPR Spectroscopies Beaulac, Rémi; Tregenna-Piggott, Philip L. W.; Barra, Anne-Laure Inorganic Chemistry, Vol. 45, Issue 8 https://doi.org/10.1021/ic051709f	journal	April 2006
The rise of 3-d single-ion magnets in molecular magnetism: towards materials from molecules? Frost, Jamie M.; Harriman, Katie L. M.; Murugesu, Muralee Chemical Science, Vol. 7, Issue 4 https://doi.org/10.1039/C5SC03224E	journal	January 2016
Far infrared spectra of magnetic ions in crystals Bloor, D.; Copland, G. M. Reports on Progress in Physics, Vol. 35, Issue 3 https://doi.org/10.1088/0034-4885/35/3/304	journal	September 1972
Measuring giant anisotropy in paramagnetic transition metal complexes with relevance to single-ion magnetism Krzystek, J.; Telser, Joshua Dalton Transactions, Vol. 45, Issue 42 https://doi.org/10.1039/C6DT01754A	journal	January 2016
First-principles prediction of redox potentials in transition-metal compounds with $LDA + U$ Zhou, F.; Cococcioni, M.; Marianetti, C. A. Physical Review B, Vol. 70, Issue 23 https://doi.org/10.1103/PhysRevB.70.235121	journal	December 2004
Chemical accuracy for the van der Waals density functional Klimeš, Jiří; Bowler, David R.; Michaelides, Angelos Journal of Physics: Condensed Matter, Vol. 22, Issue 2 https://doi.org/10.1088/0953-8984/22/2/022201	journal	December 2009
Zero-field splitting in metal complexes Boča, Roman Coordination Chemistry Reviews, Vol. 248, Issue 9-10 https://doi.org/10.1016/j.ccr.2004.03.001	journal	May 2004
Molecular Magnets Bałanda, Maria; Fitta, Magdalena Crystals, Vol. 9, Issue 3 https://doi.org/10.3390/cryst9030132	journal	March 2019
Parallel Nanoimprint Forming of One-Dimensional Chiral Semiconductor for Strain-Engineered Optical Properties Wang, Yixiu; Jin, Shengyu; Wang, Qingxiao Nano-Micro Letters, Vol. 12, Issue 1 https://doi.org/10.1007/s40820-020-00493-3	journal	August 2020
Intra-molecular origin of the spin-phonon coupling in slow-relaxing molecular magnets Lunghi, Alessandro; Totti, Federico; Sanvito, Stefano Chemical Science, Vol. 8, Issue 9 https://doi.org/10.1039/C7SC02832F	journal	January 2017
Effective g values for S = 3/2 and S = 5/2 Pilbrow, J. R. Journal of Magnetic Resonance (1969), Vol. 31, Issue 3 https://doi.org/10.1016/s0022-2364(78)80015-8	journal	September 1978
Far‐Infrared Magnetic Resonance in Fe(III) and Mn(III) Porphyrins, Myoglobin, Hemoglobin, Ferrichrome A, and Fe(III) Dithiocarbamates Brackett, G. C.; Richards, P. L.; Caughey, W. S. The Journal of Chemical Physics, Vol. 54, Issue 10 https://doi.org/10.1063/1.1674688	journal	May 1971
Lanthanide single molecule magnets: progress and perspective Zhang, Peng; Zhang, Li; Tang, Jinkui Dalton Transactions, Vol. 44, Issue 9 https://doi.org/10.1039/C4DT03329A	journal	January 2015
Quantum Tunneling of Magnetization and Related Phenomena in Molecular Materials Gatteschi, Dante; Sessoli, Roberta ChemInform, Vol. 34, Issue 16 https://doi.org/10.1002/chin.200316300	journal	April 2003
A four-coordinate cobalt(II) single-ion magnet with coercivity and a very high energy barrier Rechkemmer, Yvonne; Breitgoff, Frauke D.; van der Meer, Margarethe Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms10467	journal	February 2016
The Electronic Structure of the Isoelectronic, Square-Planar Complexes [Fe ^II (L) ₂ ] ² ^- and [Co ^III (L ^Bu ) ₂ ] ^- (L ² ^- and (L ^Bu ) ² ^- = Benzene-1,2-dithiolates): An Experimental and Density Functional Theoretical Study Ray, Kallol; Begum, Ameerunisha; Weyhermüller, Thomas Journal of the American Chemical Society, Vol. 127, Issue 12 https://doi.org/10.1021/ja042803i	journal	March 2005
High-frequency and -field EPR and FDMRS study of the [Fe(H2O)6]2+ ion in ferrous fluorosilicate Krzystek, J.; Smirnov, D.; Schlegel, Christoph Journal of Magnetic Resonance, Vol. 213, Issue 1 https://doi.org/10.1016/j.jmr.2011.09.046	journal	December 2011

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