353 research outputs found
Interaction-induced negative differential resistance in asymmetric molecular junctions
Combining insights from quantum chemistry calculations with master equations,
we discuss a mechanism for negative differential resistance (NDR) in molecular
junctions, operated in the regime of weak tunnel coupling. The NDR originates
from an interplay of orbital spatial asymmetry and strong electron-electron
interaction, which causes the molecule to become trapped in a non-conducting
state above a voltage threshold. We show how the desired asymmetry can be
selectively introduced in individual orbitals in e.g., OPE-type molecules by
functionalization with a suitable side group, which is in linear conjugation to
one end of the molecule and cross-conjugated to the other end.Comment: 8 page
Using satellite imagery to assess the influence of urban development on the impacts of extreme rainfall
Using satellite imagery to assess the influence of recent urban development on the impacts of extreme rainfall
High pressure processing of meat:possible role of myofibrillar protein interactions and cathepsin activity
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