Ultraviolet Probing of Quantum Crossbars

TL;DR

This paper explores how ultraviolet scattering can be used to probe the spectral properties of quantum crossbars, revealing dimensional crossovers and interaction effects through spectral peak analysis.

Contribution

It introduces a method to analyze UV scattering spectra to observe 1D to 2D crossovers and interaction effects in quantum crossbars.

Findings

UV scattering peaks depend on scattering direction

1D to 2D crossover appears as peak splitting

Interaction increases peak splitting and decreases amplitude

Abstract

Ultraviolet (UV) scattering on quantum crossbars (QCB) is an effective tool for probing QCB spectral properties, leading to excitation of QCB plasmon(s). Experimentally, such a process corresponds to sharp peaks in the frequency dependence of the differential scattering cross section. The peak frequency strongly depends on the direction of the scattered light. As a result, $1D\to 2D$ crossover can be observed in the scattering spectrum. It manifests itself as a splitting of single lines into multiplets (mostly doublets). The splitting magnitude increases with interaction in QCB crosses, while the peak amplitudes decrease with electron-electron interaction within a QCB constituent.