G. M. Minkov

Quantum corrections to the conductivity in two-dimensional systems: Agreement between theory and experiment

The quantum correction to the conductivity have been studied in two types of 2D heterostructures: with doped quantum well and doped barriers. The consistent analysis shows that in the structures where electrons occupy the states in quantum well only, all the temperature and magnetic field dependencies of the components of resistivity tensor are well described by the theories of quantum corrections. The contribution of electron-electron interaction to the conductivity have been determined reliably in the structures with different electron density. A possible reason of large scatter in experimental data concerning the contribution of electron-electron interaction, obtained in previous papers, and the role of the carriers, occupied the states of the doped layers, is discussed.

Quantum corrections to conductivity: From weak to strong localization

Results of detailed investigations of the conductivity and Hall effect in gated single quantum well GaAs/InGaAs/GaAs heterostructures with two-dimensional electron gas are presented. A successive analysis of the data has shown that the conductivity is diffusive for

Diffusion and ballistic contributions of the interaction correction to the conductivity of a two-dimensional electron gas

k_F l=25-2

Weak antilocalization in quantum wells in tilted magnetic fields

and behaves like diffusive one for

Electron-electron interaction with decreasing conductance

k_F l=2-0.5

Two-dimensional semimetal in a wide HgTe quantum well: Magnetotransport and energy spectrum

down to the temperature T=0.4 K. It has been therewith found that the quantum corrections are not small at low temperature when

Giant suppression of the Drude conductivity due to quantum interference in the disordered two-dimensional system GaAs/InxGa1- xAs/GaAs

k_F l\simeq 1

Analysis of negative magnetoresistance: Statistics of closed paths. I. Theory

. They are close in magnitude to the Drude conductivity so that the conductivity

Weak antilocalization in HgTe quantum wells with inverted energy spectra

\sigma

Spin-orbit splitting of valence and conduction bands in HgTe quantum wells near the Dirac point

becomes significantly less than