Work

High-temperature effects on oscillatory conductivity in disordered quantum dot arrays: Role of Coulomb interactions and localization length

Year: 2025

Type: article

Abstract: Using a theoretical model that incorporates the full energy landscape of the electronic density of states of disordered arrays of quantum dots (DAQDs) with a realistic size distribution and non-uniform doping, we have examined the oscillatory behavior of electrical conductivity σ as a function of the average doping concentration ND. We find that Coulomb interactions between charged quantum dots suppress the magnitude of these oscillations, whereas increasing the temperature increases the magnitude of these oscillations. Furthermore, the magnitude of the oscillations increases with an increase of the localization length ξ. The observed oscillatory behavior of σ suggests the potential for optimizing the conductivity of DAQDs for application-specific purposes through controlled doping.

Source: Journal of Applied Physics

DOI: 10.1063/5.0238227

Authors: Anjali Panwar, Vikas Malik, Subhendra D. Mahanti, Neeleshwar Sonnathi, Anjana Bagga

Institutions: Guru Gobind Singh Indraprastha University, Jaypee Institute of Information Technology, Michigan State University

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funder: Science and Engineering Research Board