Abstract
Localization effect on the dynamical conductivity σ( ω) is examined in quantum dots and disordered electron systems. For the small volume limit, which is well described by the random matrix theory, Re[ σ( ω)] is known to be proportional to the DOS correlator 〈 ν( E) ν( E+ ω)〉, hence to the universal two-level correlator R 2 WD( ω/ Δ). Looking at localization effect, however, reveals the discrepancy between Re[ σ( ω)] and 〈 ν( E) ν( E+ ω)〉, because only the former, not the latter, is consistent with the logarithmic weak localization correction in 2D and its RG treatment. We investigate and clarify the issue by evaluating the linear response σ( ω) directly from the nonlinear sigma formulation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Physica E: Low-dimensional Systems and Nanostructures
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.