Search Results - "Macdonald, H. A."

Nature of the Correlated Insulator States in Twisted Bilayer Graphene by Xie, Ming, MacDonald, A H

“…We use self-consistent Hartree-Fock calculations performed in the full π-band Hilbert space to assess the nature of the recently discovered correlated…”
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Theory of Phonon-Mediated Superconductivity in Twisted Bilayer Graphene by Wu, Fengcheng, MacDonald, A H, Martin, Ivar

“…We present a theory of phonon-mediated superconductivity in near magic angle twisted bilayer graphene. Using a microscopic model for phonon coupling to moiré…”
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Topological Insulators in Twisted Transition Metal Dichalcogenide Homobilayers by Wu, Fengcheng, Lovorn, Timothy, Tutuc, Emanuel, Martin, Ivar, MacDonald, A H

“…We show that moiré bands of twisted homobilayers can be topologically nontrivial, and illustrate the tendency by studying valence band states in ±K valleys of…”
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Hubbard Model Physics in Transition Metal Dichalcogenide Moiré Bands by Wu, Fengcheng, Lovorn, Timothy, Tutuc, Emanuel, MacDonald, A H

“…Flexible long period moiré superlattices form in two-dimensional van der Waals crystals containing layers that differ slightly in lattice constant or…”
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Weak-Field Hall Resistivity and Spin-Valley Flavor Symmetry Breaking in Magic-Angle Twisted Bilayer Graphene by Xie, Ming, MacDonald, A. H.

“…Near a magic twist angle, the lowest energy conduction and valence bands of bilayer graphene moiré superlattices become extremely narrow. The band dispersion…”
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Anomalous Hall effect arising from noncollinear antiferromagnetism by Chen, Hua, Niu, Qian, MacDonald, A H

“…As established in the very early work of Edwin Hall, ferromagnetic conductors have an anomalous Hall conductivity contribution that cannot be attributed to…”
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Topological Exciton Bands in Moiré Heterojunctions by Wu, Fengcheng, Lovorn, Timothy, MacDonald, A H

“…Moiré patterns are common in van der Waals heterostructures and can be used to apply periodic potentials to elementary excitations. We show that the optical…”
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Exact Diagonalization for Magic-Angle Twisted Bilayer Graphene by Potasz, Pawel, Xie, Ming, MacDonald, A. H.

“…We report on finite-size exact-diagonalization calculations in a Hilbert space defined by the continuum-model flat moiré bands of magic angle twisted bilayer…”
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Voltage-Controlled Magnetic Reversal in Orbital Chern Insulators by Zhu, Jihang, Su, Jung-Jung, MacDonald, A H

“…Chern insulator ferromagnets are characterized by a quantized anomalous Hall effect and have so far been identified experimentally in magnetically doped…”
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WKB Estimate of Bilayer Graphene's Magic Twist Angles by Ren, Yafei, Gao, Qiang, MacDonald, A H, Niu, Qian

“…Graphene bilayers exhibit zero-energy flatbands at a discrete series of magic twist angles. In the absence of intrasublattice interlayer hopping, zero-energy…”
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Phonon Hall Viscosity of Ionic Crystals by Flebus, B, MacDonald, A H

“…When time-reversal symmetry is broken, the low-energy description of acoustic lattice dynamics allows for a dissipationless component of the viscosity tensor,…”
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Quantum anomalous Hall effect in graphene proximity coupled to an antiferromagnetic insulator by Qiao, Zhenhua, Ren, Wei, Chen, Hua, Bellaiche, L, Zhang, Zhenyu, Macdonald, A H, Niu, Qian

“…We propose realizing the quantum anomalous Hall effect by proximity coupling graphene to an antiferromagnetic insulator that provides both broken time-reversal…”
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Antiferromagnetic metal spintronics by MacDonald, A. H., Tsoi, M.

“…In this brief review, we explain the theoretical basis for the notion that spin-transfer torques (STTs) and giant-magnetoresistance effects can, in principle,…”
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Giant magneto-optical Kerr effect and universal Faraday effect in thin-film topological insulators by Tse, Wang-Kong, MacDonald, A H

“…Topological insulators can exhibit strong magneto-electric effects when their time-reversal symmetry is broken. In this Letter we consider the magneto-optical…”
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Electrical switching of magnetic order in an orbital Chern insulator by Polshyn, H., Zhu, J., Kumar, M. A., Zhang, Y., Yang, F., Tschirhart, C. L., Serlin, M., Watanabe, K., Taniguchi, T., MacDonald, A. H., Young, A. F.

“…Magnetism typically arises from the joint effect of Fermi statistics and repulsive Coulomb interactions, which favours ground states with non-zero electron…”
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Time-Reversal Symmetry-Breaking Nematic Insulators near Quantum Spin Hall Phase Transitions by Xue, Fei, MacDonald, A H

“…We study the phase diagram of a model quantum spin Hall system as a function of band inversion and band-coupling strength, demonstrating that when band…”
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Transport Studies of Dual-Gated ABC and ABA Trilayer Graphene: Band Gap Opening and Band Structure Tuning in Very Large Perpendicular Electric Fields by Zou, K, Zhang, Fan, Clapp, C, MacDonald, A. H, Zhu, J

“…We report on the transport properties of ABC and ABA stacked trilayer graphene using dual, locally gated field effect devices. The high efficiency and large…”
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Two-dimensional chiral topological superconductivity in Shiba lattices by Li, Jian, Neupert, Titus, Wang, Zhijun, MacDonald, A. H., Yazdani, A., Bernevig, B. Andrei

“…The chiral p-wave superconductor is the archetypal example of a state of matter that supports non-Abelian anyons, a highly desired type of exotic…”
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Electrical Reservoirs for Bilayer Excitons by Xie, Ming, MacDonald, A H

“…The ground state of two-dimensional (2D) electron systems with equal low densities of electrons and holes in nearby layers is an exciton fluid. We show that a…”
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How to make a bilayer exciton condensate flow by Su, Jung-Jung, MacDonald, A. H

“…Among the many examples of Bose condensation considered in physics, electron–hole-pair (exciton) condensation has maintained special interest because of…”
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