Conductance Fluctuations in a Disordered Double-Barrier Junction

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dc.creatorMelsen, J. A.
dc.creatorBeenakker, C. W. J.
dc.date1995-01-16
dc.date.accessioned2026-07-07T03:07:37Z
dc.date.available2026-07-07T03:07:37Z
dc.descriptionWe consider the effect of disorder on coherent tunneling through two barriers in series, in the regime of overlapping transmission resonances. We present analytical calculations (using random-matrix theory) and numerical simulations (on a lattice) to show that strong mode-mixing in the inter-barrier region induces mesoscopic fluctuations in the conductance $G$ of universal magnitude $e^2/h$ for a symmetric junction. For an asymmetric junction, the root-mean-square fluctuations depend on the ratio $ν$ of the two tunnel resistances according to ${rms} G = (4e^2/h)β^{-1/2} ν(1+ν)^{-2}$, where $β= 1 (2)$ in the presence (absence) of time-reversal symmetry.
dc.description12 pages, REVTeX-3.0, 2 figures, submitted to Physical Review B
dc.identifierhttps://arxiv.org/abs/cond-mat/9501062
dc.identifierhttp://arxiv.org/abs/cond-mat/9501062
dc.identifierPhys. Rev. B 51 (1995) 14483
dc.identifierdoi:10.1103/PhysRevB.51.14483
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/27235
dc.subjectCondensed Matter
dc.titleConductance Fluctuations in a Disordered Double-Barrier Junction
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