Browsing by Author "Sevinçli, H."
Now showing items 1-9 of 9
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Dynamics of phononic dissipation at the atomic scale: Dependence on internal degrees of freedom
(American Physical Society, 2007)Dynamics of dissipation local vibrations to the surrounding substrate is a key issue in friction between sliding surfaces as well as in boundary lubrication. We consider a model system consisting of an excited nano-particle ... -
Electronic and magnetic properties of 3d transition-metal atom adsorbed graphene and graphene nanoribbons
(American Physical Society, 2008)In this paper, we theoretically studied the electronic and magnetic properties of graphene and graphene nanoribbons functionalized by 3d transition-metal (TM) atoms. The binding energies and electronic and magnetic properties ... -
First-principles approach to monitoring the band gap and magnetic state of a graphene nanoribbon via its vacancies
(American Physical Society, 2008)Using first-principles plane-wave calculations we predict that electronic and magnetic properties of graphene nanoribbons can be modified by the defect-induced itinerant states. Structure optimization gives rise to significant ... -
Non-Markovian decoherence: A critique of the two-level approximation
(Elsevier B.V., 2006)The environmental decoherence in multilevelled systems in the context of two-level approximation is examined. It is found that the environmental temperature plays a minor role in the magnitudes of the decoherence rates ... -
The off-resonant aspects of decoherence and a critique of the two-level approximation
(IOP Institute of Physics, 2006)Conditions in favour of a realistic multilevelled description of a decohering quantum system are examined. In this regard the first crucial observation is that the thermal effects, contrary to the conventional belief, play ... -
Size-dependent alternation of magnetoresistive properties in atomic chains
(American Institute of Physics, 2006)Spin-polarized electronic and transport properties of carbon atomic chains are investigated when they are capped with magnetic transition-metal (TM) atoms like Cr or Co. The magnetic ground state of the TM-C n-TM chains ... -
Spin confinement in the superlattices of graphene ribbons
(AIP Publishing, 2008)Based on first-principles calculations, we showed that repeated heterostructures of zigzag graphene nanoribbons of different widths form multiple quantum well structures. Edge states of specific spin directions can be ... -
Spintronic properties of carbon-based one-dimensional molecular structures
(American Physical Society, 2006)In this paper we present an extensive study of the electronic, magnetic, and transport properties of finite and infinite periodic atomic chains composed of carbon atoms and 3d transition metal (TM) atoms using first-principles ... -
Superlattice structures of graphene-based armchair nanoribbons
(American Physical Society, 2008)Based on first-principles calculations we predict that periodically repeated junctions of armchair graphene nanoribbons of different widths form multiple quantum well structures. In these superlattice heterostructures the ...
