.png){kind=icon}
.png){kind=icon}
Return
Microscopic current dynamics in nanoscale junctions
.png){kind=icon}
OA
AI
DOI：10.1103/PhysRevB.75.115410.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
So far, transport properties of nanoscale contacts have been studied mostly within the static scattering approach. The electron dynamics and the transient behavior of current flow, however, remain poorly understood. We present a numerical study of microscopic current flow dynamics in nanoscale quantum point contacts. We employ an approach that combines a microcanonical picture of transport with time-dependent density-functional theory. We carry out atomic and jellium model calculations to show that the time evolution of the current flow exhibits several noteworthy features, such as nonlaminarity and edge flow. We attribute these features to the interaction of the electron fluid with the ionic lattice, to the existence of pressure gradients in the fluid, and to the transient dynamical formation of surface charges at the nanocontact-electrode interfaces. Our results suggest that quantum transport systems exhibit hydrodynamical characteristics, which resemble those of a classical liquid.
Keywords:
SCANNING TUNNELING POTENTIOMETRY
DENSITY-FUNCTIONAL THEORY
TIME-DEPENDENT TRANSPORT
MESOSCOPIC CONDUCTORS
SYSTEMS
NANOSTRUCTURES
CONTACT
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
3.7
Papers:
15.4W
Citations:
41.0W
Organization
No organization information available