@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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    dct:description """
              Since its experimental discovery in 2004, graphene (a single layer of graphite) has attracted a lot of attention. It also leads to a renewed interest in graphite. Subsequently, both these materials have extensively been studied using different experimental techniques. In this thesis we demonstrate that transmission measurements performed in extremely high magnetic field (> 1 million times the earth's magnetic field) are a very useful tool to investigate the electronic structure of graphene and graphite. In particular, we will demonstrate that electron-hole asymmetry in graphite is caused by the often neglected free-electron kinetic energy term. This term is also present in the Hamiltonian describing electronic properties of graphene, hence it will lead to an asymmetry in graphene. Additionally, using near-infrared and visible sources from 200meV to 2eV we observe strong series of interband transitions in graphite between the four interlayer split bands (E3+, E3-, E1 and E2) up to 150 T at room temperature. The K-point electron resonances can be described well using an effective bilayer graphene model and the H-point transitions correspond to monolayer graphene. It is demonstrated that this can be reduced to a single measurement of the dispersion relation which is described by the relativistic formula where E2=m02v4 + p2v2 with v the Fermi velocity and a single particle rest energy m0v² of 385 meV for the K-point electrons and zero as expected for the H-point.
            """ ;
    dct:identifier "tel-00777855" ;
    dct:issued "2026-05-15T04:43:32.497150"^^xsd:dateTime ;
    dct:language "fr" ;
    dct:modified "2026-05-15T04:43:32.497155"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Optical Spectroscopy of Graphite and Graphene under Megagauss Magnetic Field" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-tel-00777855v1/resource/12ed2241-6cb3-496b-8dc5-acc77012fb41> ;
    dcat:keyword "asymetrie-electron-trou",
        "asymmetry",
        "champ-magnetique",
        "dirac-fermions",
        "electron-hole",
        "fermions-de-dirac",
        "graphene",
        "graphite",
        "infoeu-reposemanticsdoctoralthesis",
        "magnetic-field",
        "megagauss",
        "optical-spectroscopy",
        "physcondgasphysics-physicscondensed-matter-cond-matquantum-gases-cond-matquant-gas",
        "relativite",
        "relativity",
        "spectroscopie-optique",
        "theses" ;
    dcat:landingPage <https://theses.hal.science/tel-00777855> .

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    dct:format "HTML" ;
    dct:issued "2026-05-15T04:43:32.506040"^^xsd:dateTime ;
    dct:modified "2026-05-15T04:43:32.460136"^^xsd:dateTime ;
    dct:title "Optical Spectroscopy of Graphite and Graphene under Megagauss Magnetic Field" ;
    dcat:accessURL <https://theses.hal.science/tel-00777855> .

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    foaf:name "test_moissonnage_selune" .

<https://theses.hal.science/tel-00777855> a foaf:Document .