Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2001-12-18
Pramana-J. Phys. 58, 241-257 (2002)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 2 figures
Scientific paper
10.1007/s12043-002-0011-3
We introduce a hierarchy of density of states to characterize the charge distribution in a mesoscopic conductor. At the bottom of this hierarchy are the partial density of states which represent the contribution to the local density of states if both the incident and the out-going scattering channel is prescribed. The partial density of states play a prominent role in measurements with a scanning tunneling microscope on multiprobe conductors in the presence of current flow. The partial density of states determine the degree of dephasing generated by a weakly coupled voltage probe. In addition the partial density of states determine the frequency-dependent response of mesoscopic conductors in the presence of slowly oscillating voltages applied to the contacts of the sample. The partial density of states permit the formulation of a Friedel sum rule which can be applied locally. We introduce the off-diagonal elements of the partial density of states matrix to describe charge fluctuation processes. This generalization leads to a local Wigner-Smith life-time matrix.
No associations
LandOfFree
Charge densities and charge noise in mesoscopic conductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Charge densities and charge noise in mesoscopic conductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge densities and charge noise in mesoscopic conductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-43876