scholarly journals Intra-molecular origin of the spin-phonon coupling in slow-relaxing molecular magnets

2017 ◽  
Vol 8 (9) ◽  
pp. 6051-6059 ◽  
Author(s):  
Alessandro Lunghi ◽  
Federico Totti ◽  
Stefano Sanvito ◽  
Roberta Sessoli
Keyword(s):  
Molecular Magnets ◽  
Molecular Vibrations ◽  
Phonon Coupling ◽  
Magnetic Molecules ◽  
Molecular Origin

The design of slow relaxing magnetic molecules requires the optimization of internal molecular vibrations to reduce spin-phonon coupling.

scholarly journals Electron–phonon coupling in engineered magnetic molecules

2016 ◽  
Vol 52 (76) ◽  
pp. 11359-11362 ◽  
Author(s):  
Violeta Iancu ◽  
Koen Schouteden ◽  
Zhe Li ◽  
Chris Van Haesendonck
Keyword(s):  
Low Temperatures ◽  
Phonon Coupling ◽  
Zero Bias ◽  
Magnetic Molecules ◽  
Kondo Resonance ◽  
Electron Phonon Coupling

We probe electron–phonon coupling in CoTPyP and CrTPyP synthesized magnetic molecules. Low temperatures STS reveals pronounced Kondo resonances at zero bias in both molecules and additional Kondo resonance replicas observed at higher voltages in vibrating CoTPyP molecules.

Analysis of vibronic coupling in a 4f molecular magnet with FIRMS

2021 ◽  
Author(s):  
Jon G. C. Kragskow ◽  
Jonathan Marbey ◽  
Christian Dirk Buch ◽  
Joscha Nehrkorn ◽  
Mykhaylo Ozerov ◽  
...  
Keyword(s):  
Magnetic Relaxation ◽  
Electronic States ◽  
Far Infrared ◽  
Vibronic Coupling ◽  
Chemical Processes ◽  
Molecular Magnets ◽  
Molecular Magnet ◽  
Magnetic Memory ◽  
Vibrational Modes ◽  
Phonon Coupling

<p><b>Vibronic coupling, the interaction between molecular vibrations and electronic states, is a pervasive effect that profoundly affects chemical processes. In the case of molecular magnetic materials, vibronic, or spin-phonon, coupling leads to magnetic relaxation, which equates to loss of magnetic memory and loss of phase coherence in molecular magnets and qubits, respectively. The study of vibronic coupling is challenging, and most experimental evidence is indirect. Here we employ far-infrared magnetospectroscopy to probe vibronic transitions in in [Yb(trensal)] (where H<sub>3</sub>trensal = 2,2,2-tris(salicylideneimino)trimethylamine). We find intense signals near electronic states, which we show arise due to an “envelope effect” in the vibronic coupling Hamiltonian, and we calculate the vibronic coupling fully <i>ab initio</i> to simulate the spectra. We subsequently show that vibronic coupling is strongest for vibrational modes that simultaneously distort the first coordination sphere and break the C<sub>3</sub> symmetry of the molecule. With this knowledge, vibrational modes could be identified and engineered to shift their energy towards or away from particular electronic states to alter their impact. Hence, these findings provide new insights towards developing general guidelines for the control of vibronic coupling in molecules.</b></p>

Acetylene Coupler Builds Strong and Tunable Diradical Organic Molecular Magnets

2021 ◽  
Author(s):  
Jiapeng Ma ◽  
Yuan Yuan ◽  
Baotao Kang ◽  
Jin Yong Lee
Keyword(s):  
Molecular Magnets ◽  
Low Energy ◽  
Spintronic Devices ◽  
Magnetic Molecules

Sufficiently strong molecular magnets are used in small modern electronic and spintronic devices. Diradical organic magnetic molecules (OMMs) are promising options due to their lightness, flexibility, and low energy required...

Enchaining EDTA-chelated lanthanide molecular magnets into ordered 1D networks

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72510-72518 ◽  
Author(s):  
Rebecca J. Holmberg ◽  
Ilia Korobkov ◽  
Muralee Murugesu
Keyword(s):  
Molecular Magnets ◽  
One Dimension ◽  
Molecular Systems ◽  
Magnetic Molecules ◽  
Ordered Arrays ◽  
Unique Method

Extending molecular systems into chain networks is a unique method with which to orient magnetic molecules into well-ordered arrays along one dimension, and study their resulting properties.

scholarly journals Plasmon-phonon coupling between mid-infrared chiral metasurfaces and molecular vibrations

2020 ◽  
Vol 28 (14) ◽  
pp. 21192
Author(s):  
Md Shamim Mahmud ◽  
Daniel Rosenmann ◽  
David A. Czaplewski ◽  
Jie Gao ◽  
Xiaodong Yang
Keyword(s):  
Molecular Vibrations ◽  
Phonon Coupling ◽  
Mid Infrared

scholarly journals Vibronic Coupling in a Molecular 4f Qubit

2021 ◽  
Author(s):  
Jonathan Marbey ◽  
Jon G. C. Kragskow ◽  
Christian Dirk Buch ◽  
Joscha Nehrkorn ◽  
Mykhaylo Ozerov ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Magnetic Relaxation ◽  
Electronic States ◽  
Far Infrared ◽  
Vibronic Coupling ◽  
Chemical Processes ◽  
Molecular Magnets ◽  
Magnetic Memory ◽  
Vibrational Modes ◽  
Phonon Coupling

<p><b>Vibronic coupling, the interaction between molecular vibrations and electronic states, is a pervasive effect that profoundly affects chemical processes. In the case of molecular magnetic materials, vibronic, or spin-phonon, coupling leads to magnetic relaxation, which equates to loss of magnetic memory and loss of phase coherence in molecular magnets and qubits, respectively. The study of vibronic coupling is challenging, and most experimental evidence is indirect. Here we employ far-infrared magnetospectroscopy to probe vibronic transitions in a Yb<sup>III</sup> molecular qubit directly. We find intense signals near electronic states, which we show arise due to an “envelope effect” in the vibronic coupling Hamiltonian, and we calculate the vibronic coupling fully <i>ab initio</i> to simulate the spectra. We subsequently show that vibronic coupling is strongest for vibrational modes that simultaneously distort the first coordination sphere and break the C<sub>3</sub> symmetry of the molecule. With this knowledge, vibrational modes could be identified and engineered to shift their energy towards or away from particular electronic states to alter their impact. Hence, these findings provide new insights towards developing general guidelines for the control of vibronic coupling in molecules.</b></p>

Magnetic Quality in a Boscovichian Assemblage of Molecular Magnets

1906 ◽  
Vol 25 (2) ◽  
pp. 1025-1059 ◽  
Author(s):  
W. Peddie
Keyword(s):  
Molecular Magnets ◽  
Molecular Magnetism ◽  
Magnetic Molecules ◽  
Directional Control ◽  
Firm Basis ◽  
Material Bodies ◽  
Mutual Action ◽  
Great Development ◽  
Magnetic Phenomena

1. The gradual growth of the theory of molecular magnetism from the original suggestions of Poisson and Weber is well known. The recent great development, made by Ewing, and tested experimentally by means of models, has placed the theory on a fairly firm basis, and has made essentially secure the fundamental postulate that magnetic phenomena in material bodies are due to magnetic molecules which may possibly be regarded as free from any directional control other than that supplied by their own mutual action.

scholarly journals Vibronic Coupling in a Molecular 4f Qubit

2021 ◽  
Author(s):  
Jonathan Marbey ◽  
Jon G. C. Kragskow ◽  
Christian Dirk Buch ◽  
Joscha Nehrkorn ◽  
Mykhaylo Ozerov ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Magnetic Relaxation ◽  
Electronic States ◽  
Far Infrared ◽  
Vibronic Coupling ◽  
Chemical Processes ◽  
Molecular Magnets ◽  
Magnetic Memory ◽  
Vibrational Modes ◽  
Phonon Coupling

<p><b>Vibronic coupling, the interaction between molecular vibrations and electronic states, is a pervasive effect that profoundly affects chemical processes. In the case of molecular magnetic materials, vibronic, or spin-phonon, coupling leads to magnetic relaxation, which equates to loss of magnetic memory and loss of phase coherence in molecular magnets and qubits, respectively. The study of vibronic coupling is challenging, and most experimental evidence is indirect. Here we employ far-infrared magnetospectroscopy to probe vibronic transitions in a Yb<sup>III</sup> molecular qubit directly. We find intense signals near electronic states, which we show arise due to an “envelope effect” in the vibronic coupling Hamiltonian, and we calculate the vibronic coupling fully <i>ab initio</i> to simulate the spectra. We subsequently show that vibronic coupling is strongest for vibrational modes that simultaneously distort the first coordination sphere and break the C<sub>3</sub> symmetry of the molecule. With this knowledge, vibrational modes could be identified and engineered to shift their energy towards or away from particular electronic states to alter their impact. Hence, these findings provide new insights towards developing general guidelines for the control of vibronic coupling in molecules.</b></p>

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