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hal.structure.identifierDepartment of Theoretical Physics
dc.contributor.authorMOSKVIN, S. A.
hal.structure.identifierLow Temperature Physics and Superconductivity Department
dc.contributor.authorGIPPIUS, A. A.
hal.structure.identifierLow Temperature Physics and Superconductivity Department
dc.contributor.authorTKACHEV, A. V.
hal.structure.identifierDepartment of Physics
dc.contributor.authorMAHAJAN, A. V.
hal.structure.identifierIndian Institute of Technology Bombay [IIT Bombay]
dc.contributor.authorCHAKRABARTY, T.
hal.structure.identifierLomonosov Moscow State University = Université d'État Lomonossov de Moscou [Moscou] [MSU]
dc.contributor.authorPRESNIAKOV, Igor A.
hal.structure.identifierLomonosov Moscow State University = Université d'État Lomonossov de Moscou [Moscou] [MSU]
dc.contributor.authorSOBOLEV, Alexey
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMAZEAU, Gérard
dc.date.issued2012
dc.identifier.issn1098-0121
dc.description.abstractEnA well-isolated Zhang-Rice (ZR) singlet as a ground state of the Cu3+ center in hole-doped cuprates is a leading paradigm in modern theories of high-temperature superconductivity. However, a dramatic temperature evolution of the 6,7Li NMR signal in La2Li0.5Cu0.5O4, a system with a regular lattice of well-isolated Cu3+ centers, reveals significant magnetic fluctuations and suggests a quasidegeneracy to be a generic property of their ground state at variance with the simple ZR model. We argue for a competition of the ZR state with nearby states formed by a "doped" hole occupying purely oxygen nonbonding a2g(π) and eu(π) orbitals rather than a conventional b1g(dx2−y2) Cu 3d-O 2p hybrid. The temperature variation of the 6,7Li NMR line shape and spin-lattice relaxation rate point to a gradual slowing down of some magnetic order parameter's fluctuations without distinct signatures of a phase transition down to T=2 K. This behavior agrees with a stripelike ferrodistortive fluctuating Ammm order in a two-dimensional structure of the (CuLi)O2 planes accompanied by unconventional oxygen orbital antiferromagnetic fluctuations.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevB.86.241107
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con]
bordeaux.journalPhysical Review B: Condensed Matter and Materials Physics (1998-2015)
bordeaux.page241107(R)
bordeaux.volume86
bordeaux.issue24
bordeaux.peerReviewedoui
hal.identifierhal-00772877
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00772877v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2012&rft.volume=86&rft.issue=24&rft.spage=241107(R)&rft.epage=241107(R)&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=MOSKVIN,%20S.%20A.&GIPPIUS,%20A.%20A.&TKACHEV,%20A.%20V.&MAHAJAN,%20A.%20V.&CHAKRABARTY,%20T.&rft.genre=article


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