Geometry-dependent dephasing in small metallic wires.

Low-temperature dephasing in irradiated metallic wires

Mesoscopic Aharonov-bohm Oscillations in Metallic Rings

We study the amplitude of mesoscopic Aharonov-Bohm oscillations in quasi-one-dimensional (Q1D) diffusive rings. We consider first the lowtemperature limit of a fully coherent sample. The variance of oscillation harmonics is calculated as a function of the length of the leads attaching the ring to reservoirs. We further analyze the regime of relatively high temperatures, when the dephasing due t...

Robust ultrafast currents in molecular wires through Stark shifts.

A novel way to induce ultrafast currents in molecular wires using two incident laser frequencies, omega and 2omega, is demonstrated. The mechanism relies on Stark shifts, instead of near-resonance photon absorption, to transfer population to the excited states and exploits the temporal profile of the field to generate phase-controllable transport. Calculations in a trans- polyacetylene oligomer...

Electron energy and phase relaxation on magnetic impurities

We discuss the effect of magnetic impurities on the inelastic scattering and dephasing of electrons. Magnetic impurities mediate the energy exchange between electrons. This mechanism is especially effective at small energy transfers E in the absence of Zeeman splitting, when the two-particle collision integral in the electron kinetic equation has a kernel K ∝ 1/E in a broad energy range. In a m...

Absorption losses in periodic arrays of thin metallic wires.

We analyze the transmission and reflection of electromagnetic waves calculated from transfer matrix simulations of periodic arrangements of thin metallic wires. The effective permittivity and the absorption of the arrangements of wires are determined. Their dependence on the wire thickness and the conductance of the metallic wires is studied. The cutoff frequency, or effective plasma frequency,...