1995/03/08 by N. Turner, J. T. Nicholls, Turner, N. +11
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9503040
REVTeX 3.0 macros required, 4 pages text, 3 postscript figures in a second file
arxiv created 1995/03/08 · arxiv updated 2009/11/30
We have measured the tunneling between two two-dimensional electron gases (2DEGs) in weak magnetic fields, when the carrier densities of the two electron layers are matched. At zero magnetic field, B=0, the lineshape of the equilibrium tunneling resonance is best fit by a Lorentzian, with a linewidth which is determined by the roughness of the tunnel barrier. For B\not=0 with filling factors ν≫ 1, there is a suppression of the resonant tunneling conductance about zero bias, Vsd=0. This low field signature of the high field Coulomb gap shows the same linear B dependence as previously measured for ν<1.