The formation of multidomain epitaxial graphene on Rh(111) under ultra-high vacuum (UHV) conditions has been characterized by scanning tunnelling microscopy (STM) measurements and density functional theory (DFT) calculations. At variance with the accepted view for strongly interacting graphene-metal systems, we clearly demonstrate the formation of different rotational domains leading to multipl...

In last few years, graphene nanoribbon based sensorshave challenging research significance due to large surface -to-volume ratio of and also high sensitivity fast response towards toxic gases[1].Carbon monoxide (CO) is one the dangerousgas released from factories vehicle emissions[2].In present research, Non-Equilibrium Green's function (NEGF) formalism Density Functional Theory (DFT) are used ...

Semiconductor quantum dots (QDs) are being regarded as the primary unit for a wide range of advanced and emerging technologies including electronics, optoelectronics, photovoltaics biosensing applications well domain q-bits based information processing. Such QDs suitable several novel device their unique property confining carriers 3-dimensionally creating discrete states. However, realization ...

Considering von Neumann expression for reduced density matrix as thermodynamic entropy of a system strongly coupled to baths, we use nonequilibrium Green's function (NEGF) techniques derive bath and energy resolved expressions entropy, production, information flows. The consideration is consistent with dynamic (quantum transport) description reduce expected forms in limiting cases weak coupling...

We use `p estimates together with Brascamp-Lieb inequalities to obtain bounds on the variance of the solution u" to the elliptic equation r" a(x="; ')r"u" = r" f . The variance is shown to be O("r) where the exponent r depends on the contrast of a(x; '). In two dimensions, we show that variance of the Greens function of the above elliptic operator is bounded. We also obtain decay rates for the ...

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The discovery of spin-polarized states at the surface of three-dimensional topological insulators (TI) like Bi2Te3 and Bi2Se3 motivates intense interests in possible electrical measurements demonstrating unique signatures of these unusual states. Here we show that a three-terminal potentiometric set-up can be used to probe them by measuring the voltage change of a detectingmagnet upon reversing...

Graphyne, a two-dimensional carbon allotrope like graphene but containing doubly and triply bonded carbon atoms, has been proven to possess amazing electronic properties as graphene. Although the electronic, optical, and mechanical properties of graphyne and graphyne nanoribbons (NRs) have been previously studied, their electron transport behaviors have not been understood. Here we report a com...