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Theory of Ferromagnetism in Diluted Magnetic Semiconductors
Jürgen König, Hsiu-Hau Lin, Allan H. MacDonald
Carrier-induced ferromagnetism has been observed in several (III,Mn)V semiconductors. We review the theoretical picture of these ferromagnetic semiconductors that emerges from a mo…
Non-linear Transport in Quantum-Hall Smectics
A. H. MacDonald, Matthew P. A. Fisher
Recent transport experiments have established that two-dimensional electron systems with high-index partial Landau level filling, , have ground states w…
Shadow Bands and Tunneling Magnetoresistance in Itinerant Electron Ferromagnets
A. H. MacDonald, T. Jungwirth, M. Kasner
In itinerant electron ferromagnets spectral weight is transferred at finite temperatures from quasiparticle peaks located at majority and minority-spin band energies to shadow-band…
Mixed-state penetration depths in s-wave and d-wave superconductors
Yong Wang, A. H. MacDonald
We report on a microscopic calculation of the current and magnetic field distribution in the mixed state of model s-wave and d-wave superconductors. For the d-wave case, we find th…
Non Possum Comprimi Ergo Sum: Skyrmions and Edge States in the Quantum Hall Effect
A. H. MacDonald
When the chemical potential of an electron system has a discontinuity at a density , the system is said to be incompressible and a finite energy is required to create mobile…
Multi-Component Quantum Hall Systems: The Sum of their Parts and More
S. M. Girvin, A. H. MacDonald
The physics of the fractional quantum Hall effect is the physics of interacting electrons confined to a macroscopically degenerate Landau level. In this Chapter we discuss the theo…