Zero-bias anomalies of point contact resistance due to adiabatic electron renormalization of dynamical defects

Details Zero-bias anomalies of point contact resistance due to adiabatic electron renormalization of dynamical defects Zero-bias anomalies of point contact resistance due to adiabatic electron renormalization of dynamical defects

1996-10-03

arxiv.org/abs/cond-mat/9610026v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.55.259

We study effect of the adiabatic electron renormalization on the parameters of the dynamical defects in the ballistic metallic point contact. The upper energy states of the ``dressed'' defect are shown to give a smaller contribution to a resistance of the contact than the lower energy ones. This holds both for the "classical" renormalization related to defect coupling with average local electron density and for the "mesoscopic" renormalization caused by the mesoscopic fluctuations of electronic density the dynamical defects are coupled with. In the case of mesoscopic renormalization one may treat the dynamical defect as coupled with Friedel oscillations originated by the other defects, both static and mobile. Such coupling lifts the energy degeneracy of the states of the dynamical defects giving different mesoscopic contribution to resistance, and provides a new model for the fluctuator as for the object originated by the electronic mesoscopic disorder rather than by the structural one. The correlation between the defect energy and the defect contribution to the resistance leads to zero-temperature and zero-bias anomalies of the point contact resistance. A comparison of these anomalies with those predicted by the Two Channel Kondo Model (TCKM) is made. It is shown, that although the proposed model is based on a completely different from TCKM physical background, it leads to a zero-bias anomalies of the point contact resistance, which are qualitatively similar to TCKM predictions.

Affiliated with

Also associated with

No associations

Rating

Zero-bias anomalies of point contact resistance due to adiabatic electron renormalization of dynamical defects 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 Zero-bias anomalies of point contact resistance due to adiabatic electron renormalization of dynamical defects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zero-bias anomalies of point contact resistance due to adiabatic electron renormalization of dynamical defects will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-106929