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  Spin states, vibrations and spin relaxation in molecular nanomagnets and spin qubits: a critical perspective

Escalera-Moreno, L., Baldovi, J., Gaita-Ariño, A., & Coronado, E. (2018). Spin states, vibrations and spin relaxation in molecular nanomagnets and spin qubits: a critical perspective. Chemical Science, 9(13), 3265-3275. doi:10.1039/c7sc05464e.

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© The Royal Society of Chemistry

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https://dx.doi.org/10.1039/c7sc05464e (Publisher version)
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Escalera-Moreno, L.1, Author
Baldovi, J.2, Author           
Gaita-Ariño, Alejandro1, Author
Coronado, Eugenio1, Author
Affiliations:
1Instituto de Ciencia Molecular (ICMol), Univ. de Valencia, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              

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 Abstract: Very recently the closely related fields of molecular spin qubits, single ion magnets and single atom magnets have been shaken by unexpected results. We have witnessed a jump in the phase memory times of spin qubits from a few microseconds to almost a millisecond in a vanadium complex, magnetic hysteresis up to 60 K in a dysprosium-based magnetic molecule and magnetic memory up to 30 K in a holmium atom deposited on a surface. With single-molecule magnets being more than two decades old, this rapid improvement in the physical properties is surprising and its explanation deserves urgent attention. The general assumption of focusing uniquely on the energy barrier is clearly insufficient to model magnetic relaxation. Other factors, such as vibrations that couple to spin states, need to be taken into account. In fact, this coupling is currently recognised to be the key factor that accounts for the slow relaxation of magnetisation at higher temperatures. Herein we will present a critical perspective of the recent advances in molecular nanomagnetism towards the goal of integrating spin–phonon interactions into the current computational methodologies of spin relaxation. This presentation will be placed in the context of the well-known models developed in solid state physics, which, as we will explain, are severely limited for molecular systems.

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Language(s): eng - English
 Dates: 2017-12-262018-03-072018-04-072018-04-07
 Publication Status: Issued
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/c7sc05464e
 Degree: -

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Project name : The present work has been funded by the EU (COST Action CA15128 MOLSPIN, ERC-2014-CoG-647301 DECRESIM and ERC-2016-AdG-694097 QSpec-New Mat), the Spanish MINECO (Unit of Excellence “ Mar ́ ı a de Maeztu ” MdM-2015-0538, and grants MAT2017-89993-R and CTQ2017-89528-P) and the Generalitat Valenciana (Prometeo Program of Excellence). L. E.-M. also thanks the Generalitat Valenciana for a VALi+D predoctoral contract, J. J. B. acknowledges the EU for a Marie Curie Fellowship (H2020-MSCA-IF-2016-751047) and A. G.-A. acknowledges funding by the MINECO (Ram ́ on y Cajal contract). We want to thank the anonymous referees that helped us improve this work.
Grant ID : 751047
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Chemical Science
  Other : Chem. Sci.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 9 (13) Sequence Number: - Start / End Page: 3265 - 3275 Identifier: ISSN: 2041-6520
CoNE: https://pure.mpg.de/cone/journals/resource/2041-6520