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Ferromagnetism in (III,Mn)V Semiconductors
J. König, J. Schliemann, T. Jungwirth +1
In this review article we briefly summarize the main experimental properties of (III,Mn)V ferromagnets and outline several different but related approaches that have been explored…
Bias-voltage induced phase-transition in bilayer quantum Hall ferromagnets
Yogesh N. Joglekar, Allan H. MacDonald
We consider bilayer quantum Hall systems at total filling factor in presence of a bias voltage which leads to different filling factors in each layer. We use auxiliary…
Anomalous Hall effect in ferromagnetic semiconductors
T. Jungwirth, Qian Niu, A. H. MacDonald
We present a theory of the anomalous Hall effect in ferromagnetic (Mn,III)V semiconductors. Our theory relates the anomalous Hall conductance of a homogeneous ferromagnet to the Be…
Quantum-Hall Quantum-Bits
S. -R. Eric Yang, John Schliemann, A. H. MacDonald
Bilayer quantum Hall systems can form collective states in which electrons exhibit spontaneous interlayer phase coherence. We discuss the possibility of using bilayer quantum dot m…
Thermodynamic and Tunneling Density of States of the Integer Quantum Hall Critical State
S. -R. Eric Yang, Ziqiang Wang, A. H. MacDonald
We examine the long wave length limit of the self-consistent Hartree-Fock approximation irreducible static density-density response function by evaluating the charge induced by an…
Tunneling current characteristics in bilayer quantum Hall systems
Yogesh N. Joglekar, Allan H. MacDonald
Weakly disordered bilayer quantum Hall systems at filling factor show spontaneous interlayer phase coherence if the layers are sufficiently close together. We study the colle…
Generalized Random-Phase Approximation Theory of Quasiparticle Spectral Functions: Application to Bilayer Quantum Hall Ferromagnets
Yogesh N. Joglekar, Allan H. MacDonald
We present a microscopic theory of ground-state spectral function of bilayer quantum Hall systems that includes interactions between Hartree-Fock quasiparticles and quantum fluctua…
Field-domain spintronics in magnetic semiconductor multiple quantum wells
David Sanchez, A. H. MacDonald, Gloria Platero
We develop a theory of non-linear growth direction transport in magnetically doped II-VI compound semiconductor multiple-quantum-well systems. We find that the formation of electri…
Microscopic Functional Integral Theory of Quantum Fluctuations in Double-Layer Quantum Hall Ferromagnets
Yogesh N. Joglekar, Allan H. MacDonald
We present a microscopic theory of zero-temperature order parameter and pseudospin stiffness reduction due to quantum fluctuations in the ground state of double-layer quantum Hall…
Mean-field theory of magnetic properties of MnIIIV semiconductors
M. Abolfath, T. Jungwirth, A. H. MacDonald
We present a mean-field theory of carrier-induced ferromagnetism in MnIIIV diluted magnetic semiconductors with a special emphasis placed on the magnetic anisotropy. Th…
Hole-hole correlation effects on magnetic properties of MnIIIV diluted magnetic semiconductors
T. Jungwirth, Byounghak Lee, A. H. MacDonald
The mean-field theory represents a useful starting point for studying carrier-induced ferromagnetism in MnIIIV diluted magnetic semiconductors. A detail description of…
Quantum Hall Stripe States in a Tilted Magnetic Field
T. Jungwirth, A. H. MacDonald, L. Smrčka +1
A strong anisotropy in the longitudinal resistivity of a 2D electron system has been observed at half-filled high Landau levels. We report on detailed Hartree-Fock calculations of…