Publications (9)
Cyclotron-resonant exciton transfer between the nearly free and strongly localized radiative states of a two-dimensional hole gas in a high magnetic field
L. Bryja, J. Jadczak, A. Wojs +7
Avoided crossing of the emission lines of a nearly free positive trion and a cyclotron replica of an exciton bound to an interface acceptor has been observed in the magneto-photolu…
Integral and fractional Quantum Hall Ising ferromagnets
K. Vyborny, O. Certik, D. Pfannkuche +3
We compare quantum Hall systems at filling factor 2 to those at filling factors 2/3 and 2/5, corresponding to the exact filling of two lowest electron or composite fermion (CF) Lan…
The enigma of the fractional quantum Hall effect
Jimmy A. Hutasoit, Ajit C. Balram, Sutirtha Mukherjee +5
The fractional quantum Hall effect at , which has been definitively observed, is one of the last fractions for which no viable explanation has so far been demonstrated. O…
Transport gap in a nu=1/3 quantum Hall system: a probe for skyrmions
A. F. Dethlefsen, R. J. Haug, K. Vyborny +2
The dependence of the activated gap on magnetic field is studied for the fractional filling factor~1/3. By comparing the experimental results with results from exact diagonalizatio…
Disorder induced loss of magnetization in Lieb's graphene quantum dots
B. Jaworowski, P. Potasz, A. Wojs
The stability of the magnetization in Lieb graphene quantum dots (GQD) against disorder is studied. Such systems exhibit the degenerate shell of edge states in the middle of the en…
Electronic properties of gated triangular graphene quantum dots: Magnetism, correlations, and geometrical effects
P. Potasz, A. D. Guclu, A. Wojs +1
We present a theory of electronic properties of gated triangular graphene quantum dots with zigzag edges as a function of size and carrier density. We focus on electronic correlati…