Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-08-02
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
3 pages, 3 figures; formatting corrected
Scientific paper
10.1016/j.physe.2007.08.102
We present the results of non-linear tunnelling spectroscopy between an array of independent quantum wires and an adjacent two-dimensional electron gas (2DEG) in a double-quantum-well structure. The two layers are separately contacted using a surface-gate scheme, and the wires are all very regular, with dimensions chosen carefully so that there is minimal modulation of the 2DEG by the gates defining the wires. We have mapped the dispersion spectrum of the 1D wires down to the depletion of the last 1D subband by measuring the conductance \emph{G} as a function of the in-plane magnetic field \emph{B}, the interlayer bias $V_{\rm dc}$ and the wire gate voltage. There is a strong suppression of tunnelling at zero bias, with temperature and dc-bias dependences consistent with power laws, as expected for a Tomonaga-Luttinger Liquid caused by electron-electron interactions in the wires. In addition, the current peaks fit the free-electron model quite well, but with just one 1D subband there is extra structure that may indicate interactions.
Anderson Daniel
Farrer Ian
Ford C. J. B.
Jompol Y.
Jones Geb A. C.
No associations
LandOfFree
Probing e-e interactions in a periodic array of GaAs quantum wires 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 Probing e-e interactions in a periodic array of GaAs quantum wires, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probing e-e interactions in a periodic array of GaAs quantum wires will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-244472