42 papers
Dynamics of magnetization coupled to a thermal bath of elastic modes
Enrico Rossi, Olle G. Heinonen, A. H. MacDonald
We study the dynamics of magnetization coupled to a thermal bath of elastic modes using a system plus reservoir approach with realistic magnetoelastic coupling. After integrating o…
Theory of interlayer tunneling in bi-layer quantum Hall ferromagnets
Ady Stern, S. M. Girvin, A. H. MacDonald +1
Spielman et al. have recently observed a large zero-bias peak in the tunnel conductance of a bi-layer system in a quantum Hall ferromagnet state. We argue that disorder-induced top…
Strong Correlation to Weak Correlation Phase Transition in Bilayer Quantum Hall Systems
John Schliemann, S. M. Girvin, A. H. MacDonald
At small layer separations, the ground state of a nu=1 bilayer quantum Hall system exhibits spontaneous interlayer phase coherence and has a charged-excitation gap E_g. The evoluti…
Hartree-Fock Theory of Hole Stripe States
Tae-Suk Kim, S. R. Eric Yang, A. H. MacDonald
We report on Hartree-Fock theory results for stripe states of two-dimensional hole systems in quantum wells grown on GaAs (311)A substrates. We find that the stripe orientation ene…
Phonon-mediated drag at : A test of the Chern-Simons composite fermion theory
Martin C. Bonsager, Yong Baek Kim, A. H. MacDonald
We report on a study of the phonon-mediated frictional drag between two-dimensional electron layers at the Landau level filling factor predicted by Chern-Simons composite-f…
Theory of Diluted Magnetic Semiconductor Ferromagnetism
Jürgen König, Hsiu-Hau Lin, Allan H. MacDonald
We present a theory of carrier-induced ferromagnetism in diluted magnetic semiconductors (III_{1-x} Mn_x V) which allows for arbitrary itinerant-carrier spin polarization and dynam…