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Quantum conductance fluctuations in 3D ballistic adiabatic wires. | Vladimir I. Fal’ko
; G.B. Lesovik
; | Date: |
17 Mar 1995 | Subject: | cond-mat | Affiliation: | Max-Planck-Institut fur Festkorperforschung, Stuttgart, Germany) and G.B. Lesovik (Institute of Solid State Physics, Chernogolovka, Russia | Abstract: | Quantum conductance of 3D ballistic wires with idealy flat boundaries obeys fluctuations with the properties quite distinguishable from those of universal conductance fluctuations: Both their amplitude and the sensitivity to the magnetic field flux $Phi =HS$ penetrated into the sample cross-sectional area $S$ are different and depend on details of the cross-sectioanl shape of the wire. When the latter is integrable, conductance fluctuations have the enlarged amplitude $delta Gsimleft[(e^2/h)^3G
ight]^{1/4}$. When the cross-sectional shape of a wire is non-integrable, the irregular part of a conductance has the $e^ 2/h$ scale, whereas the correlation field is reduced to the value of $H_Ssim (lambda_F/sqrt S)^{1/2}(Phi_0/S)$ and the correlation voltage of the nonlinear conductance fluctuations has the scale of $eV_csimhbar^2/mSsim E_F/(S/lambda_F)$, where $lambda_F=1/p_F$ is the Fermi wavelength. | Source: | arXiv, cond-mat/9503097 | Services: | Forum | Review | PDF | Favorites |
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