Experimental Evidence for a Coulomb Gap in Two Dimensions

Details Experimental Evidence for a Coulomb Gap in Two Dimensions Experimental Evidence for a Coulomb Gap in Two Dimensions

1995-06-01

arxiv.org/abs/cond-mat/9506006v1

Physics

Condensed Matter

uuencoded compressed postscript-file (4 pages)

Scientific paper

10.1103/PhysRevB.52.7857

We have studied the resistivity, $\rho$, of a two-dimensional electron system in silicon in the temperature range 200 mK < T < 7.5 K at zero magnetic field at low electron densities, when the electron system is in the insulating regime. Our results show that at an intermediate temperature range $\rho=\rho_0 exp[(T_0/T)^{1/2}]$ for at least four orders of magnitude up to 3x10^9 Ohms. This behavior is consistent with the existence of a Coulomb gap. Near the metal/insulator transition, the prefactor was found to be close to $h/e^2$, and resistivity scales with temperature. For very low electron densities, $n_s$, the prefactor diminishes with diminishing $n_s$. A comparison with the theory shows that a specific set of conditions are necessary to observe the behavior of resistivity consistent with the existence of the Coulomb gap.

Affiliated with

Also associated with

No associations

Rating

Experimental Evidence for a Coulomb Gap in Two Dimensions 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 Experimental Evidence for a Coulomb Gap in Two Dimensions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Experimental Evidence for a Coulomb Gap in Two Dimensions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-611851