Electron transport through quantum wires and point contacts

Details Electron transport through quantum wires and point contacts Electron transport through quantum wires and point contacts

2004-06-07

arxiv.org/abs/cond-mat/0406163v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages

Scientific paper

10.1103/PhysRevB.70.233308

We have studied quantum wires using the Green's function technique and the density-functional theory, calculating the electronic structure and the conductance. All the numerics are implemented using the finite-element method with a high-order polynomial basis. For short wires, i.e. quantum point contacts, the zero-bias conductance shows, as a function of the gate voltage and at a finite temperature, a plateau at around 0.7G_0. (G_0 = 2e^2/h is the quantum conductance). The behavior, which is caused in our mean-field model by spontaneous spin polarization in the constriction, is reminiscent of the so-called 0.7-anomaly observed in experiments. In our model the temperature and the wire length affect the conductance-gate voltage curves in the same way as in the measured data.

Affiliated with

Also associated with

No associations

Rating

Electron transport through quantum wires and point contacts 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 Electron transport through quantum wires and point contacts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron transport through quantum wires and point contacts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-594435