Symmetry causes a huge conductance peak in double quantum dots

Details Symmetry causes a huge conductance peak in double quantum dots Symmetry causes a huge conductance peak in double quantum dots

2009-02-18

arxiv.org/abs/0902.3099v1

Phys. Rev. Lett. 102, 186802 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5pages 3 figures and an appendix ONLY in arXiv version

Scientific paper

10.1103/PhysRevLett.102.186802

We predict a huge interference effect contributing to the conductance through large ultra-clean quantum dots of chaotic shape. When a double-dot structure is made such that the dots are the mirror-image of each other, constructive interference can make a tunnel barrier located on the symmetry axis effectively transparent. We show (via theoretical analysis and numerical simulation) that this effect can be orders of magnitude larger than the well-known universal conductance fluctuations and weak-localization (both less than a conductance quantum). A small magnetic field destroys the effect, massively reducing the double-dot conductance; thus a magnetic field detector is obtained, with a similar sensitivity to a SQUID, but requiring no superconductors.

Affiliated with

Also associated with

No associations

Rating

Symmetry causes a huge conductance peak in double quantum dots 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 Symmetry causes a huge conductance peak in double quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Symmetry causes a huge conductance peak in double quantum dots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-128107