Browsing by Author "Eticha, Moreda"

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    Quantum hall Effect in Graphene
    (Addis Ababa University, 2015-10) Eticha, Moreda; Senbeta, Teshome (PhD)
    We studied Quantum Hall E ect with and without magnetic eld in graphene. The quan- tum Hall e ect is a quantum-mechanical version of the Hall e ect, observed in graphene, in which the Hall conductance ( H) takes on the quantized values ( e2/h) with = 4(n+1 2 ) an integer (integer quantized Hall E ect in graphene). Our study con rmed that there is a zero energy Landau level in graphene with magnetic elds. The fractional quantum Hall e ect in graphene is observed as the result of coulomb interaction and correlation of electrons