How do nanogranular structures affect electrical conductivity? This research investigates the thermopower (S) and electrical conductivity (σ) in Cux(SiO2)1−x nanogranular films across a temperature range of 2 to 300 K, focusing on how material composition influences electrical transport, and is relevant to the fields of **physics** and **chemistry**. These films represent unique materials with applications in microelectronics and sensing technologies. The study reveals that disorder-enhanced electron-electron interaction effects govern σ behavior at low temperatures. A crossover from σ∝T to σ∝T1/3 temperature dependence is observed as x decreases and the metal-insulator transition is approached. In contrast, S remains small, displays a linear temperature dependence, and is relatively insensitive to changes in x. Ultimately, this research provides valuable insights into the electrical properties of nanogranular films, with important implications for the design and development of advanced electronic materials. Understanding these transport mechanisms is crucial for tailoring the performance of nanogranular films for various applications in sensing, microelectronics, and energy harvesting, while also having relevance to the world of **engineering**.
Published in Applied Physics Letters, this research aligns with the journal's focus on experimental and theoretical developments in condensed matter physics and materials science. By investigating the electrical conductivity and thermopower of nanogranular films, it contributes to the understanding of electron transport in disordered systems. The references demonstrate engagement with relevant research in solid-state physics, thin-film physics, and materials characterization.