Semiconductors

Role of interparticle collisions in the transport properties of two-component two-dimensional electron systems with a parabolic spectrum

E. E. Kolontaeva^a, M. V. Boev<sup>ab

a</sup> Novosibirsk State Technical University
^b Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk

Abstract: The contribution of the Coulomb interaction to the conductivity of a two-dimensional electron system with two different effective masses of electrons is theoretically studied. It is shown that, unlike impurity scattering, in which the difference in effective masses is weakly manifested, the correction to conductivity from electron-electron scattering is extremely sensitive to the nanostructure parameters. For a significant difference in the electron effective masses, the low-temperature asymptotic behavior of the contribution of the electron-electron interaction to conductivity is $\propto T^2\ln T$, with the sign of this contribution determined by the position of the Fermi level and the characteristics of disorder in the system.

Keywords: electron-electron scattering, two-dimensional electron system, conductivity.

Received: 17.09.2025
Revised: 29.10.2025
Accepted: 29.10.2025

DOI: 10.61011/FTT.2025.10.61964.256-25

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