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      Nonadiabatic couplings from time-dependent density functional theory: Formulation in the Casida formalism and practical scheme within modified linear response

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      The Journal of Chemical Physics
      AIP Publishing

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          Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene

          When electrons are confined in two-dimensional (2D) materials, quantum mechanically enhanced transport phenomena, as exemplified by the quantum Hall effects (QHE), can be observed. Graphene, an isolated single atomic layer of graphite, is an ideal realization of such a 2D system. Here, we report an experimental investigation of magneto transport in a high mobility single layer of graphene. Adjusting the chemical potential using the electric field effect, we observe an unusual half integer QHE for both electron and hole carriers in graphene. Vanishing effective carrier masses is observed at Dirac point in the temperature dependent Shubnikov de Haas oscillations, which probe the 'relativistic' Dirac particle-like dispersion. The relevance of Berry's phase to these experiments is confirmed by the phase shift of magneto-oscillations, related to the exceptional topology of the graphene band structure.
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            Exchange and correlation in atoms, molecules, and solids by the spin-density-functional formalism

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              Excitation energies from time-dependent density-functional theory.

              (1996)
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                Author and article information

                Journal
                The Journal of Chemical Physics
                The Journal of Chemical Physics
                AIP Publishing
                0021-9606
                1089-7690
                August 14 2007
                August 14 2007
                : 127
                : 6
                : 064103
                Article
                10.1063/1.2755665
                5c4fd10c-f450-4431-989a-3c158edbab76
                © 2007
                History

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