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

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

dc.contributor.author	Escalera Moreno, Luis
dc.contributor.author	Baldoví, José J.
dc.contributor.author	Gaita Ariño, Alejandro
dc.contributor.author	Coronado Miralles, Eugenio
dc.date.accessioned	2021-05-07T08:13:30Z
dc.date.available	2021-05-08T04:45:05Z
dc.date.issued	2018	es_ES
dc.identifier.uri	https://hdl.handle.net/10550/79238
dc.description.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.	es_ES
dc.description.sponsorship	COST Action CA15128 MOLSPIN	es_ES
dc.description.sponsorship	ERC-2014-CoG-647301 DECRESIM	es_ES
dc.description.sponsorship	ERC-2016-AdG-694097 QSpec-New Mat	es_ES
dc.description.sponsorship	Unit of Excellence “María de Maeztu” MdM-2015-0538	es_ES
dc.description.sponsorship	MAT2017-89993-R	es_ES
dc.description.sponsorship	CTQ2017-89528-P	es_ES
dc.language.iso	en	es_ES
dc.source	Escalera-Moreno, L.; Baldoví, J. J.; Gaita-Ariño, A.; Coronado, E. (2018) Chemical Science, 9, 3265-3275	es_ES
dc.title	Spin states, vibrations and spin relaxation in molecular nanomagnets and spin qubits: a critical perspective	es_ES
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::QUÍMICA	es_ES
dc.identifier.doi	https://doi.org/10.1039/C7SC05464E	es_ES
dc.description.abstractenglish	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.	es_ES
dc.identifier.idgrec	124465	es_ES
dc.accrualmethod	-	es_ES
dc.embargo.terms	0 days	es_ES