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Title: Spin transport studies in graphene
Keywords: Graphene, CVD, spintronics, functionalization, spin-valves, spin Hall effect
Issue Date: 16-Aug-2013
Citation: JAYAKUMAR BALAKRISHNAN (2013-08-16). Spin transport studies in graphene. ScholarBank@NUS Repository.
Abstract: The work described in this thesis is an attempt to understand the spin transport properties of graphene- the weakly spin-orbit coupled two dimensional allotrope of carbon. In the first half of the thesis, we make an effort to understand the spin relaxation mechanisms in monolayer and bilayer graphene. Our systematic analysis employing spin-valve geometry shows that, unlike monolayer graphene, in bilayer graphene the spin dephasing occurs due to the precession of spins under the influence of local spin-orbit fields between momentum scatterings. The second half of the thesis focuses on enhancing the spin-orbit interaction in graphene by introducing adatoms. Our pioneering experiments in graphene samples decorated with adatoms, demonstrate a three orders of magnitude increase in spin-orbit interaction strength while preserving the unique transport properties of intrinsic graphene. In such samples, we realize for the first time non-local spin Hall effect at zero applied magnetic fields.
Appears in Collections:Ph.D Theses (Open)

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