1994/05/24 by D. Z. Liu, Ben Yu-Kuang Hu, Charles Stafford +2 · 2 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat
paper · pdf · doi:10.1103/physrevb.50.5799
published as Phys. Rev. B 50, R5799 (1994) · 4 pages, REVTeX 3.0, 5 figures(ps file available upon request), #phd09
arxiv created 1994/05/24 · openalex publication_date 1994/08/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using a finite-frequency recursive Green's-function technique, we calculate the dynamic magnetoconductance fluctuations and oscillations in disordered mesoscopic normal-metal systems, incorporating interparticle Coulomb interactions within a self-consistent potential method. In a disorderd metal wire, we observe ergodic behavior in the dynamic conductance fluctuations. At low \ensuremathω, the real part of the conductance fluctuations is essentially given by the dc universal conductance fluctuations while the imaginary part increases linearly from zero, but for \ensuremathω greater than the Thouless energy and temperature, the fluctuations decrease as \mathrm\ensuremathω^\mathrm\ensuremath-1/2. Similar frequency-dependent behavior is found for the Aharonov-Bohm oscillations in a metal ring. However, the Al'tshuler-Aronov-Spivak oscillations, which predominate at high temperatures or in rings with many channels, are strongly suppressed at high frequencies, leading to interesting crossover effects in the \ensuremathω dependence of the magnetoconductance oscillations.