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Magnetic Minibands and Electron–Electron Bound States in Ac-Driven Graphene with Space-Modulated Gap

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The emergence of the magnetic minibads in the quasienergy spectrum of graphene superlattice subjected to the quantizing magnetic field and electromagnetic radiation was investigated. The graphene superlattice was assumed to be formed by space-periodical modulation of the gap in the vicinity of the Dirac point of the graphene band structure. The explicit form of the Floquet spectrum of electron was derived in the case of weak spatial modulation. Minibads widths were shown to change with ac electric field amplitude. The possibility of electron–electron bound states was shown. The binding energies of these states were shown to be the function of the amplitude of ac electric field.
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Keywords: BOUND STATES; FLOQUET SPECTRUM; GRAPHENE SUPERLATTICE; MAGNETIC MINIBANDS; QUASIENERGY

Document Type: Research Article

Publication date: April 1, 2017

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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