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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
dc.contributor.authorBENIWAL, Sumit
hal.structure.identifierDepartment of Physics and Astronomy
dc.contributor.authorZHANG, X.
hal.structure.identifierDepartment of Physics and Astronomy
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
dc.contributor.authorDOWBEN, Peter A.
hal.structure.identifierDepartment of Physics and Astronomy
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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