224 citations · 1.1k across the 21 of their papers we have counts for
21 papers
Nucleation at the phase transition near 40~C in MnAs nanodisks
B Jenichen, Y Takagaki, K H Ploog +3
The phase transition near 40~C of both as-grown thin epitaxial MnAs films prepared by molecular beam epitaxy on GaAs(001) and nanometer-scale disks fabricated from the s…
A microscopic model for the magnetic field driven breakdown of the dissipationless state in the integer and fractional quantum Hall effect
A. Poux, Z. R. Wasilewski, K. J. Friedland +5
Intra Landau level thermal activation, from localized states in the tail, to delocalized states above the mobility edge in the same Landau level, explains the (half width…
Comment on "Identification of different electron screening behavior between the bulk and surface of (Ga,Mn)As [Phys. Rev. Lett. 107, 187203 (2011)]"
M. Moreno, K. H. Ploog
In a recent Letter [Phys. Rev. Lett. 107, 187203 (2011)], Fujii et al. reported Mn 2p photoelectron emission spectra for (Ga,Mn)As recorded using hard x-rays. Due to the enhanced b…
Phase-separated high-temperature-annealed (Ga,Mn)As: A negative charge-transfer-energy material
M. Moreno, K. H. Ploog
The approximate location in the Zaanen-Sawatzky-Allen diagram of the phase-separated (Ga,Mn)As material, consisting of MnAs nanoclusters embedded in GaAs, is determined on the basi…
Enhanced electron correlations, local moments, and Curie temperature in strained MnAs nanocrystals embedded in GaAs
M. Moreno, J. I. Cerdá, K. H. Ploog +1
We have studied the electronic structure of hexagonal MnAs, as epitaxial continuous film on GaAs(001) and as nanocrystals embedded in GaAs, by Mn 2p core-level photoemission spectr…
Quantum effects in linear and non-linear transport of T-shaped ballistic junction
J. Wrobel, P. Zagrajek, M. Czapkiewicz +6
We report low-temperature transport measurements of three-terminal T-shaped device patterned from GaAs/AlGaAs heterostructure. We demonstrate the mode branching and bend resistance…