6,053 research outputs found
Divacancy-induced Ferromagnetism in Graphene Nanoribbons
Zigzag graphene nanoribb ons have spin-polarized edges,
anti-ferromagnetically coupled in the ground state with total spin zero.
Customarily, these ribbons are made ferromagnetic by producing an imbalance
between the two sublattices. Here we show that zigzag ribbons can be
ferromagnetic due to the presence of reconstructed divacancies near one edge.
This effect takes place despite the divacancies are produced by removing two
atoms from opposite sublattices, being balanced before reconstruction to 5-8-5
defects. We demonstrate that there is a strong interaction between the
defect-localized and edge bands which mix and split away from the Fermi level.
This splitting is asymmetric, yielding a net edge spin-polarization. Therefore,
the formation of reconstructed divacancies close to the edges of the
nanoribbons can be a practical way to make them partially ferromagnetic
Topologically confined states at corrugations of gated bilayer graphene
We investigate the electronic and transport properties of gated bilayer
graphene with one corrugated layer, which results in a stacking AB/BA boundary.
When a gate voltage is applied to one layer, topologically protected gap states
appear at the corrugation, which reveal as robust transport channels along the
stacking boundary. With increasing size of the corrugation, more localized,
quantum-well-like states emerge. These finite-size states are also conductive
along the fold, but in contrast to the stacking boundary states, which are
gapless, they present a gap. We have also studied periodic corrugations in
bilayer graphene; our findings show that such corrugations between AB- and
BA-stacked regions behave as conducting channels that can be easily identified
by their shape
Software X10-UPNP Bridge
IADIS MULTI CONFERENCE ON COMPUTER SCIENCE AND
INFORMATION SYSTEMS 2008
Amsterdam, The Netherlands
JULY 22 - 24, 2008In a future of smart houses where multiple heterogeneous devices will be interconnected to provide new functionalities
and to ease everyday tasks, several issues will challenge the research, including interoperability and interfaces between
different systems. The work presented in this paper describes a software bridge that exposes X10 devices as UPnP
devices to UPnP control points, banking on the networks integration and alternatives to create mixed installations
that are optimized for ease, reliability and functionality
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