@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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              This work presents a new magnetic order in the pseudo-gap phase of superconducting cuprates. The study of the three families YBa2Cu3O6+δ, HgBa2CuO4+δ and La1.92Sr0.08CuO4 reveals a magnetic order parameter developping under the temperature of the opening pseudo-gap. For the first time, we report the existence of collective modes associated to this order in the system HgBa2CuO4+δ. All the results converge to the conclusion that the pseudo-gap is linked to a true phase transition, with an order parameter and a symmetry breaking : the time reversal symmetry. It is worth noticing that the translation symmetry of the lattice is preserved, so that this order can be qualified as Q=0 order. Moreover, our study of incommensurate spin fluctuations near the antiferromagnetic wave vector (QAF) has enabled us to demonstrate the underlying competition between two magnetic instabilities : the Q=0 order and the QAF spin fluctuations in both YBa2Cu3O6+δ, and La1.92Sr0.08CuO4 . All these results could be a key toward the understanding of the puzzling high TC superconductivity.
            """ ;
    dct:identifier "tel-00683440" ;
    dct:issued "2026-05-23T06:51:38.294297"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-23T06:51:38.294302"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Hidden magnetic order parameter in the pseudogap phase of high temperature copper oxydes" ;
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            vcard:fn "CCSD" ] ;
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    dcat:keyword "infoeu-reposemanticsdoctoralthesis",
        "physcondcm-scephysics-physicscondensed-matter-cond-matstrongly-correlated-electrons-cond-",
        "superconductivity-pseudogap",
        "supraconducteur-pseudogap",
        "theses" ;
    dcat:landingPage <https://theses.hal.science/tel-00683440> .

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    dct:issued "2026-05-23T06:51:38.332862"^^xsd:dateTime ;
    dct:modified "2026-05-23T06:51:38.281890"^^xsd:dateTime ;
    dct:title "Hidden magnetic order parameter in the pseudogap phase of high temperature copper oxydes" ;
    dcat:accessURL <https://theses.hal.science/tel-00683440> .

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