[Sans titre]
| hal.structure.identifier | Department of Theoretical Physics | |
| dc.contributor.author | MOSKVIN, S. A. | |
| hal.structure.identifier | Low Temperature Physics and Superconductivity Department | |
| dc.contributor.author | GIPPIUS, A. A. | |
| hal.structure.identifier | Low Temperature Physics and Superconductivity Department | |
| dc.contributor.author | TKACHEV, A. V. | |
| hal.structure.identifier | Department of Physics | |
| dc.contributor.author | MAHAJAN, A. V. | |
| hal.structure.identifier | Indian Institute of Technology Bombay [IIT Bombay] | |
| dc.contributor.author | CHAKRABARTY, T. | |
| hal.structure.identifier | Lomonosov Moscow State University [MSU] | |
| dc.contributor.author | PRESNIAKOV, Igor A. | |
| hal.structure.identifier | Lomonosov Moscow State University [MSU] | |
| dc.contributor.author | SOBOLEV, Alexey | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DEMAZEAU, Gérard | |
| dc.date.issued | 2012 | |
| dc.identifier.issn | 1098-0121 | |
| dc.description.abstractEn | A 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.iso | en | |
| dc.publisher | American Physical Society | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevB.86.241107 | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con] | |
| bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
| bordeaux.page | 241107(R) | |
| bordeaux.volume | 86 | |
| bordeaux.issue | 24 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00772877 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00772877v1 | |
| bordeaux.COinS | ctx_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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