Hopping conductivity of a suspension of nanowires in an insulator

Details Hopping conductivity of a suspension of nanowires in an insulator Hopping conductivity of a suspension of nanowires in an insulator

2006-04-27

arxiv.org/abs/cond-mat/0604644v2

Phys. Rev. B 74, 054205 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.74.054205

We study the hopping conduction in a composite made of straight metallic nanowires randomly and isotropically suspended in an insulator. Uncontrolled donors and acceptors in the insulator lead to random charging of wires and hence finite bare density of states at the Fermi level. Then the Coulomb interactions between electrons of distant wires result in the soft Coulomb gap. At low temperatures the conductivity is due to variable range hopping of electrons between wires and obeys the Efros-Shklovskii (ES) law $\ln\sigma \propto -(T_{ES}/T)^{1/2}$. We show that $T_{ES} \propto 1/(nL^3)^2$, where $n$ is the concentration of wires and $L$ is the wire length. Due to enhanced screening of Coulomb potentials, at large enough $nL^3$, the ES law is replaced by the Mott law.

Affiliated with

Also associated with

No associations

Rating

Hopping conductivity of a suspension of nanowires in an insulator 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 Hopping conductivity of a suspension of nanowires in an insulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hopping conductivity of a suspension of nanowires in an insulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-327390