The sudden reduction of the photoluminescence linewidth observed at low temperature in coupled quantum wells is analysed in view of possible 2D phase transitions occurring at different density limits. The linewidth calculated ...

We developed a formalism within the linear-response theory to investigate the transport through a quantum point contact between two electron-gas reservoirs. It is valid for two-terminal conductance through a constriction ...

Motivated by the state of the art method for fabricating high-density periodic nanoscale defects in graphene, the structural, mechanical, and electronic properties of defect-patterned graphene nanomeshes including diverse ...

Carbon forms various nanostructures based on the monatomic chains or strings which show transport properties of fundamental and technological interest. We have carried out first-principles quantum conductance calculations ...

First-principles, spin-relaxed pseudopotential plane wave calculations show that Ti atoms can form a continuous coating of carbon nanotubes at different amounts of coverage. Fully relaxed geometry has a complex but regular ...

We provide an explanation of the observed anomalous corrugation of the Al(111) surface by calculating the current between the Al(111) sample and tip. An atomically sharp tip images the corrugation of the surface potential, ...

The effect of external static charging of graphene and its flakes are investigated by using first-principles calculations. While the Fermi level of negatively charged graphene rises and then is quickly pinned by the ...

We show that the electronic and atomic structure of carbon nanotubes undergo dramatic changes with hydrogen chemisorption from first principle calculations. Upon uniform exohydrogenation at half coverage, the cross sections ...

We studied electron-phonon interactions in systems consisting of conducting layers separated by insulating media. The conducting layers are treated as two-dimensional Fermi liquids, and the interaction between them is ...

The quantum features of phononic thermal conduction through a molecule between two reservoirs have been studied in the weak-coupling limit. As opposed to ballistic heat transfer through a uniform bridge or atomic chain ...