Shot noise of large charge quanta in superconductor/semiconductor/superconductor junctions

Details Shot noise of large charge quanta in superconductor/semiconductor/superconductor junctions Shot noise of large charge quanta in superconductor/semiconductor/superconductor junctions

2004-06-25

arxiv.org/abs/cond-mat/0406650v4

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures, submitted to Physical Review B as a Rapid Communication. v2 author name in reference corrected. v3 added r

Scientific paper

10.1103/PhysRevB.71.020506

We have found experimentally that the noise of ballistic electron transport in a superconductor/semiconductor/superconductor junction is enhanced relative to the value given by the general relation, S_V=2eIR^2coth(eV/2kT), for two voltage regions in which this expression reduces to its thermal and shot noise limits. The noise enhancement is explained by the presence of large charge quanta, with effective charge q*=(1+2Delta/eV)e, that generate a noise spectrum S_V=2q*IR^2, as predicted in Phys. Rev. Lett. 76, 3814 (1996). These charge quanta result from multiple Andreev reflections at each junction interface, which are also responsible for the subharmonic gap structure observed in the voltage dependence of the junction's conductance.

Affiliated with

Also associated with

No associations

Rating

Shot noise of large charge quanta in superconductor/semiconductor/superconductor junctions 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 Shot noise of large charge quanta in superconductor/semiconductor/superconductor junctions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shot noise of large charge quanta in superconductor/semiconductor/superconductor junctions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-206307