Bouncing transient currents and SQUID-like voltage in nano devices at half filling

Details Bouncing transient currents and SQUID-like voltage in nano devices at half filling Bouncing transient currents and SQUID-like voltage in nano devices at half filling

2009-08-26

arxiv.org/abs/0908.3739v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 10 figures, accepted by Phys. Rev. B

Scientific paper

Nanorings asymmetrically connected to wires show different kinds of quantum interference phenomena under sudden excitations and in steady current conditions. Here we contrast the transient current caused by an abrupt bias to the magnetic effects at constant current. A repulsive impurity can cause charge build-up in one of the arms and reverse current spikes. Moreover, it can cause transitions from laminar current flow to vortices, and also change the chirality of the vortex. The magnetic behavior of these devices is also very peculiar. Those nano-circuits which consist of an odd number of atoms behave in a fundamentally different manner compared to those which consist of an even number of atoms. The circuits having an odd number of sites connected to long enough symmetric wires are diamagnetic; they display half-fluxon periodicity induced by many-body symmetry even in the absence of electron-phonon and electron-electron interactions. In principle one can operate a new kind of quantum interference device without superconductors. Since there is no gap and no critical temperature, one predicts qualitatively the same behavior at and above room temperature, although with a reduced current. The circuits with even site numbers, on the other hand, are paramagnetic.

Affiliated with

Also associated with

No associations

Rating

Bouncing transient currents and SQUID-like voltage in nano devices at half filling 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 Bouncing transient currents and SQUID-like voltage in nano devices at half filling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bouncing transient currents and SQUID-like voltage in nano devices at half filling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-623828