4.8k citations · 54.9k across the 353 of their papers we have counts for
12 papers · 1 filter
Polariton Supercurrent Generation in Unipolar Electro-optic Devices
Ming Xie, David Snoke, A. H. MacDonald
We describe a mechanism by which an electrical bias voltage applied across a unipolar semiconductor quantum well can drive an exciton or polariton supercurrent. The mechanism depen…
Theory of optical absorption by interlayer excitons in transition metal dichalcogenide heterobilayers
Fengcheng Wu, Timothy Lovorn, A. H. MacDonald
We present a theory of optical absorption by interlayer excitons in a heterobilayer formed from transition metal dichalcogenides. The theory accounts for the presence of small rela…
The Quantum Anomalous Hall Majorana Platform
Yongxin Zeng, Chao Lei, Gaurav Chaudhary +1
We show that quasi-one-dimensional (1D) quantum wires can be written onto the surface of magnetic topological insulator (MTI) thin films by gate arrays. When the MTI is in a quantu…
Collective modes of Dirac and Weyl semimetals in strong magnetic fields
John R. Tolsma, Fengcheng Wu, Allan H. MacDonald
Dirac and Weyl semimetals provide a new example of three-dimensional electron gases which are sensitive to strong magnetic fields. In this paper we address their collective excitat…
Time-Reversal Symmetry-Breaking Nematic Insulators near Quantum Spin Hall Phase Transitions
Fei Xue, Allan H. MacDonald
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 hybridization is weak, an in…
Topological Dirac states beyond orbitals for silicene on SiC(0001) surface
Ping Li, Xiao Li, Wei Zhao +6
The discovery of intriguing properties related to the Dirac states in graphene has spurred huge interest in exploring its two-dimensional group-IV counterparts, such as silicene, g…
Carrier and strain tunable intrinsic magnetism in two-dimensional MAX transition metal chalcogenides
Bheema Lingam Chittari, Dongkyu Lee, Allan H. MacDonald +2
We present a density functional theory study of the carrier-density and strain dependence of magnetic order in two-dimensional (2D) MAX (M= V, Cr, Mn, Fe, Co, Ni; A= Si, Ge, Sn…
Exciton-polarons in doped semiconductors in a strong magnetic field
Dmitry K. Efimkin, Allan H. MacDonald
In previous work we have argued that the optical properties of moderately doped two-dimensional semiconductors can be described in terms of excitons dressed by their interactions w…
Moiré band model and band gaps of graphene on hexagonal boron nitride
Jeil Jung, Evan Laksono, Ashley M. DaSilva +3
Nearly aligned graphene on hexagonal boron nitride (G/BN) can be accurately modeled by a Dirac Hamiltonian perturbed by smoothly varying moiré pattern pseudospin fields. Here, we p…
Quantum Kinetic Theory of the Chiral Anomaly
Akihiko Sekine, Dimitrie Culcer, Allan H. MacDonald
We present a general quantum kinetic theory of low-field magnetotransport in weakly disordered crystals that accounts fully for the interplay between electric-field induced interba…
Topological antiferromagnetic spintronics: Part of a collection of reviews on antiferromagnetic spintronics
Libor Šmejkal, Yuriy Mokrousov, Binghai Yan +1
The recent demonstrations of electrical manipulation and detection of antiferromagnetic spins have opened up a chapter in the spintronics story. In this article, we review the emer…
Tunable Moiré Bands and Strong Correlations in Small-Twist-Angle Bilayer Graphene
Kyounghwan Kim, Ashley DaSilva, Shengqiang Huang +7
According to electronic structure theory, bilayer graphene is expected to have anomalous electronic properties when it has long-period moiré patterns produced by small misalignment…