TY - JOUR
T1 - Conductance fluctuations in quantum wire systems
T2 - A comparison between different scattering models
AU - Grincwajg, Anna
AU - Edwards, G.
AU - Ferry, D. K.
N1 - Funding Information:
We are grateful to V.I. Kozub and J. Caro for ideas and suggestions that initiated this work, and for most valuable discussions during the completion of the project. A.G. acknowledges postdoctoral fellowships from the Swedish Research Council for Engineering Sciences (TFR), the Swedish Institute (SI) and the Ericsson ISS'90 foundation. D.K.F. and G.E. acknowledge support from NEDO under the International Joint Research Program "Nano-structures and Electron Waves Project".
PY - 1996/9
Y1 - 1996/9
N2 - Two scattering models are investigated in quasi-ballistic quantum point contact systems; a model with a few point scattering centers versus the Anderson model with on-site disorder. An exact, recursive Green's function calculation is performed to obtain magneto-transport properties. We show that, in the quasi-ballistic regime, the two models are not equivalent. The Anderson model can reproduce the same fluctuation amplitude as the "few-scatterer" model, but fails to reproduce the correlation field, since the characteristic trajectory sizes are different in the two models.
AB - Two scattering models are investigated in quasi-ballistic quantum point contact systems; a model with a few point scattering centers versus the Anderson model with on-site disorder. An exact, recursive Green's function calculation is performed to obtain magneto-transport properties. We show that, in the quasi-ballistic regime, the two models are not equivalent. The Anderson model can reproduce the same fluctuation amplitude as the "few-scatterer" model, but fails to reproduce the correlation field, since the characteristic trajectory sizes are different in the two models.
KW - Ballistic
KW - Disorder
KW - Non-universal conductance fluctuations
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U2 - 10.1016/0921-4526(96)00336-5
DO - 10.1016/0921-4526(96)00336-5
M3 - Article
AN - SCOPUS:0030235557
SN - 0921-4526
VL - 227
SP - 54
EP - 56
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 1-4
ER -