Moiré bands in twisted double-layer graphene
- R. Bistritzer, A. Macdonald
- PhysicsProceedings of the National Academy of Sciences
- 21 September 2010
This work addresses the electronic structure of a twisted two-layer graphene system, showing that in its continuum Dirac model the moiré pattern periodicity leads to moirÉ Bloch bands.
Anomalous hall effect
- N. Nagaosa, J. Sinova, S. Onoda, A. Macdonald, N. Ong
- Physics
- 26 April 2009
We present a review of experimental and theoretical studies of the anomalous Hall effect (AHE), focusing on recent developments that have provided a more complete framework for understanding this…
Observation of Majorana fermions in ferromagnetic atomic chains on a superconductor
- S. Nadj-Perge, I. Drozdov, A. Yazdani
- PhysicsScience
- 2 October 2014
High-resolution spectroscopic imaging techniques show that the onset of superconductivity, which gaps the electronic density of states in the bulk of the Fe chains, is accompanied by the appearance of zero-energy end-states, providing strong evidence for the formation of a topological phase and edge-bound Majorana fermions in atomic chains.
Universal intrinsic spin Hall effect.
- J. Sinova, D. Culcer, Q. Niu, N. Sinitsyn, T. Jungwirth, A. Macdonald
- PhysicsPhysical Review Letters
- 27 July 2003
It is argued that in a high-mobility two-dimensional electron system with substantial Rashba spin-orbit coupling, a spin current that flows perpendicular to the charge current is intrinsic, and the intrinsic spin-Hall conductivity has a universal value for zero quasiparticle spectral broadening.
Hubbard Model Physics in Transition Metal Dichalcogenide Moiré Bands.
- Fengcheng Wu, T. Lovorn, E. Tutuc, A. Macdonald
- PhysicsPhysical Review Letters
- 9 April 2018
It is theoretically shown that isolated flat moiré bands described by generalized triangular lattice Hubbard models are present in twisted transition metal dichalcogenide heterobilayers.
Theory of ferromagnetic (III, Mn) V semiconductors
- T. Jungwirth, J. Sinova, J. Masek, J. Kučera, A. Macdonald
- Physics
- 14 March 2006
The body of research on (III,Mn)V diluted magnetic semiconductors initiated during the 1990's has concentrated on three major fronts: i) the microscopic origins and fundamental physics of the…
Photonic topological insulators.
- A. Khanikaev, S. H. Mousavi, W. Tse, M. Kargarian, A. Macdonald, G. Shvets
- PhysicsNature Materials
- 1 March 2013
It is shown that metacrystals-superlattices of metamaterials with judiciously designed properties-provide a platform for designing topologically non-trivial photonic states, similar to those identified for condensed-matter topological insulators.
Intrinsic and Rashba spin-orbit interactions in graphene sheets
- H. Min, J. Hill, N. Sinitsyn, B. Sahu, L. Kleinman, A. Macdonald
- Physics
- 20 June 2006
Starting from a microscopic tight-binding model and using second-order perturbation theory, we derive explicit expressions for the intrinsic and Rashba spin-orbit interaction induced gaps in the…
Superconductors, orbital magnets and correlated states in magic-angle bilayer graphene
- Xiaobo Lu, P. Stepanov, D. Efetov
- PhysicsNature
- 15 March 2019
This study shows that broken-symmetry states, interaction-driven insulators, orbital magnets, states with non-zero Chern numbers and superconducting domes occur frequently across a wide range of moiré flat band fillings, including close to charge neutrality.
Quantum Hall ferromagnetism in graphene.
- K. Nomura, A. Macdonald
- PhysicsPhysical Review Letters
- 14 March 2006
A criterion for the occurrence of interaction-driven quantum Hall effects near intermediate integer values of e2/h due to charge gaps in broken symmetry states is derived.
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