Allan H. MacDonald
University of Texas at Austin
962 Papers
6.1K Citations
Allan H. MacDonald is an academic researcher from University of Texas at Austin. The author has contributed to research in topics: Quantum Hall effect & Quantum spin Hall effect. The author has an hindex of 119, co-authored 926 publications. Previous affiliations of Allan H. MacDonald include University of Texas Medical Branch & University of Texas at Dallas.
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Papers
Dynamics of magnetization coupled to a thermal bath of elastic modes
TL;DR: In this article, a self-contained equation for the dynamics of the magnetization was derived for the memory friction kernel and the fluctuation correlation time was found to be of the order of the ratio between the film thickness, h, and the speed of sound in the magnet and the linewidth of the ferromagnetic resonance peak should scale as B 1 h where B 1 is the magnetoelastic coupling constant.
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Exact Diagonalization for Magic-Angle Twisted Bilayer Graphene.
TL;DR: In this article, finite-size exact-diagonalization calculations in a Hilbert space defined by the continuum-model flat moir\'e bands of magic angle twisted bilayer graphene were performed.
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Spin-correlated exciton–polaritons in a van der Waals magnet
Florian Dirnberger,Rezlind Bushati,Biswajit Datta,Ajesh Kumar,Allan H. MacDonald,Edoardo Baldini,Vinod M. Menon +6 more
TL;DR: In this article , a van der Waals antiferromagnet with highly correlated electronic degrees of freedom (NiPS) was used to model the strong coupling between spin-correlated excitons and photons inside a microcavity.
Optical control of topological quantum transport in semiconductors.
TL;DR: Intense coherent laser radiation red-detuned from absorption edge can reactively activate sizable Hall-type charge and spin transport in n-doped paramagnetic semiconductors as a consequence of k-space Berry curvature transferred from the valence band to the photon-dressed conduction band.
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Infrared conductivity of metallic (III,Mn)V ferromagnets
Jairo Sinova,Tomas Jungwirth,Tomas Jungwirth,S. R. Eric Yang,S. R. Eric Yang,Jan Kučera,Allan H. MacDonald +6 more
TL;DR: In this article, the authors present a theory of the infrared conductivity and absorption coefficients of metallic ferromagnetic semiconductors and demonstrate that transverse f-sum rule measurements can be used to extract accurate values for the free-carrier density, bypassing the severe characterization difficulties that have till now been created by the large anomalous Hall effect in these materials.
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