منابع مشابه
Conductance of Mesoscopic Rings
In the studies of conductance of closed mesoscopic systems, semi-linear response theory (SLRT) offers a novel unified framework that goes beyond the traditional Kubo formulation. In this Thesis we apply SLRT to two types of mesoscopic systems. The first is disordered quasi-1d rings, where we build an analytical model to understand the departure of SLRT results from Kubo results. Guided by the n...
متن کاملCoulomb drag in mesoscopic rings
We develop a Luttinger-liquid theory of the Coulomb drag of persistent currents flowing in concentric mesoscopic rings by incorporating nonlinear corrections to the electron dispersion relation. We demonstrate that at low temperatures, interactions between electrons in different rings generate an additional phase and thus alter the period of Aharonov-Bohm oscillations. The resulting nondissipat...
متن کاملMesoscopic rings : two - fluid model
Kinetics of magnetic flux in the thin mesoscopic ring biased by an external magnetic flux exhibits the ratchet-like behavior. The 'flux velocity', i.e. the averaged time derivative of magnetic flux produced by the ring, is a candidate for a novel characteristics of mesoscopic rings. Its global properties reflect the possibility of accommodating persistent currents in the ring. 1 Mesoscopic ring...
متن کاملDiamagnetic orbital response of mesoscopic silver rings.
We report measurements of the flux-dependent orbital magnetic susceptibility of an ensemble of 10(5) disconnected silver rings at 217 MHz. Because of the strong spin-orbit scattering rate in silver this experiment is a test of existing theories on ensemble averaged persistent currents. Below 100 mK the rings exhibit a magnetic signal with a flux periodicity of h/2e consistent with averaged pers...
متن کاملThe mesoscopic conductance of ballistic rings
The calculation of the conductance of ballistic rings requires a theory that goes well beyond the Kubo-Drude formula. Assuming “mesoscopic” circumstance of very weak environmental relaxation, the conductance is much smaller compared with the naive expectation. Namely, the electro-motiveforce induces an energy absorption with a rate that depends crucially on the possibility to make connected seq...
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ژورنال
عنوان ژورنال: Europhysics Letters (EPL)
سال: 1996
ISSN: 0295-5075,1286-4854
DOI: 10.1209/epl/i1996-00290-6