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Surface-induced spin state locking of the [Fe(H2B(pz)2)2(bipy)] spin crossover complex

hal.structure.identifierDepartment of Physics and Astronomy [Lincoln]
dc.contributor.authorBENIWAL, Sumit
hal.structure.identifierDepartment of Physics and Astronomy [Lincoln]
dc.contributor.authorZHANG, X.
hal.structure.identifierDepartment of Physics and Astronomy [Lincoln]
dc.contributor.authorMU, Sai
dc.contributor.authorNAIM, Ahmad
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROSA, Patrick
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLÉTARD, Jean-François
hal.structure.identifierDepartment of Chemical Engineering
hal.structure.identifierBrookhaven National Laboratory [Upton, NY] [BNL]
dc.contributor.authorLIU, J.
hal.structure.identifierBrookhaven National Laboratory [Upton, NY] [BNL]
dc.contributor.authorSTERBINSKY, George E.
hal.structure.identifierBrookhaven National Laboratory [Upton, NY] [BNL]
dc.contributor.authorARENA, Dario A.
hal.structure.identifierDepartment of Physics and Astronomy [Lincoln]
dc.contributor.authorDOWBEN, Peter A.
hal.structure.identifierDepartment of Physics and Astronomy [Lincoln]
dc.contributor.authorENDERS, Axel
dc.date.issued2016
dc.identifier.issn0953-8984
dc.description.abstractEnTemperature- and coverage-dependent studies of the Au(1 1 1)-supported spin crossover Fe(II) complex (SCO) of the type [Fe(H2B(pz)2)2(bipy)] with a suite of surface-sensitive spectroscopy and microscopy tools show that the substrate inhibits thermally induced transitions of the molecular spin state, so that both high-spin and low-spin states are preserved far beyond the spin transition temperature of free molecules. Scanning tunneling microscopy confirms that [Fe(H2B(pz)2)2(bipy)] grows as ordered, molecular bilayer islands at sub-monolayer coverage and as disordered film at higher coverage. The temperature dependence of the electronic structure suggest that the SCO films exhibit a mixture of spin states at room temperature, but upon cooling below the spin crossover transition the film spin state is best described as a mix of high-spin and low-spin state molecules of a ratio that is constant. This locking of the spin state is most likely the result of a substrate-induced conformational change of the interfacial molecules, but it is estimated that also the intra-atomic electron–electron Coulomb correlation energy, or Hubbard correlation energy U, could be an additional contributing factor.
dc.description.sponsorshipÉléments de mémoires multifonctionnels utilisant des connections supramoléculaires auto assemblées
dc.language.isoen
dc.publisherIOP Publishing
dc.subject.enspin-crossover
dc.subject.enFe(II) spin-crossover
dc.subject.enmolecular magnetism
dc.subject.enspin state locking
dc.title.enSurface-induced spin state locking of the [Fe(H2B(pz)2)2(bipy)] spin crossover complex
dc.typeArticle de revue
dc.identifier.doi10.1088/0953-8984/28/20/206002
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
dc.subject.halChimie/Chimie de coordination
bordeaux.journalJournal of Physics: Condensed Matter
bordeaux.page206002
bordeaux.volume28
bordeaux.issue20
bordeaux.peerReviewedoui
hal.identifierhal-01314476
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01314476v1
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