Distribution functions for a two-dimensional non-interacting quantum electron gas in an external magnetic field

Non-uniform two-dimensional electron gas in a magnetic field

Basic properties of a two-dimensional electron gas with spatially varying carrier concentration in external magnetic fields are reviewed. The two main problems: modification of galvanomagnetic coefficients due to random fluctuations of equilibrium concentration and the concentration gradient created by the Lorenz force in the Hall direction — are considered for weak, classically strong, and qua...

Magnetoresistance quantum oscillations in a magnetic two-dimensional electron gas

J. Kunc,1,2,* B. A. Piot,1 D. K. Maude,1 M. Potemski,1 R. Grill,2 C. Betthausen,3 D. Weiss,3 V. Kolkovsky,4 G. Karczewski,4 and T. Wojtowicz4 1Laboratoire National des Champs Magnétiques Intenses (LNCMI), CNRS-UJF-UPS-INSA, 38042 Grenoble, France 2Institute of Physics, Faculty of Mathematics and Physics, 12116 Prague, Czech Republic 3Experimentelle und Angewandte Physik, Universität Regensburg,...

Control of a two-electron double quantum dot with an external magnetic field

Control of a two-electron quantum ring with an external magnetic field

We investigate the use of external time-dependent magnetic field for the control of the quantum states in a two-electron quantum ring. The hyperfine interaction of the confined electrons with surrounding nuclei couples the singlet state with the three triplet states. When the external magnetic field is changed, the singlet ground state becomes degenerate with the triplet states allowing singlet...

Electron Beam Dose Distribution in the Presence of Non-Uniform Magnetic Field

Introduction Magnetic fields are capable of altering the trajectory of electron beams andcan be used in radiation therapy.Theaim of this study was to produce regions with dose enhancement and reduction in the medium. Materials and Methods The NdFeB permanent magnets were arranged on the electron applicator in several configurations. Then, after the passage of the electron beams (9 and 15 MeV Va...