31 citations · 175 across the 16 of their papers we have counts for
16 papers
Chiral edge transport along domain walls in magnetic topological insulator nanoribbons
Nezhat Pournaghavi, Carlo M. Canali
Quantum anomalous Hall insulators are topologically characterized by non-zero integer Chern numbers, the sign of which depends on the direction of the exchange field that breaks ti…
Optimal field-free magnetization switching via spin-orbit torque on the surface of a topological insulator
Ivan P. Miranda, Grzegorz J. Kwiatkowski, Cecilia M. Holmqvist +6
We present an optimal field-free protocol for current-induced switching of a perpendicularly magnetized ferromagnetic insulator nanoelement on the surface of a topological insulato…
Non-collinear first-principles studies of the spin-electric coupling in frustrated triangular molecular magnets
M. F. Islam, Kushantha P. K. Withanage, C. M. Canali +1
Frustrated triangular molecular magnets (MMs) with anti-ferromagnetic ground states (GS) are an important class of magnetic systems with potential applications in quantum informati…
Pentagonal nanowires from topological crystalline insulators: a platform for intrinsic core-shell nanowires and higher-order topology
Ghulam Hussain, Giuseppe Cuono, Piotr Dziawa +12
We report on the experimental realization of Pb1-xSnxTe pentagonal nanowires (NWs) with [110] orientation using molecular beam epitaxy techniques. Using first-principles calculatio…
Non-local sidewall response and deviation from exact quantization of the topological magnetoelectric effect in axion-insulator thin films
Nezhat Pournaghavi, Anna Pertsova, Allan H. MacDonald +1
Topological insulator (TI) thin films with surface magnetism are expected to exhibit a quantized anomalous Hall effect (QAHE) when the magnetizations on the top and bottom surfaces…
Wurtzite (Ga,Mn)As nanowire shells with ferromagnetic properties
J. Sadowski, S. Kret, A. Siusys +5
(Ga,Mn)As in wurtzite crystal structure, is coherently grown by molecular beam epitaxy on the {1100} side facets of wurtizte (Ga,In)As nanowires and further encapsulated by (Ga,Al)…
Quantum Hall Edge States in Topological Insulator Nanoribbons
A. Pertsova, C. M. Canali, A. H. MacDonald
We present a microscopic theory of the chiral one-dimensional electron gas system localized on the sidewalls of magnetically-doped BiSe-family topological insulator nanorib…
Electric manipulation of the Mn-acceptor binding energy and the Mn-Mn exchange interaction on the GaAs (110) surface by nearby As vacancies
M. R. Mahani, A. H. MacDonald, C. M. Canali
We investigate theoretically the effect of nearby As (arsenic) vacancies on the magnetic properties of substitutional Mn (manganese) impurities on the GaAs (110) surface, using a m…
Spin dynamics of Mn impurities and their bound acceptors in GaAs
M. R. Mahani, A. Pertsova, C. M. Canali
We present results of tight-binding spin-dynamics simulations of individual and pairs of substitutional Mn impurities in GaAs. Our approach is based on the mixed quantum-classical…
Interplay between Mn-acceptor state and Dirac surface states in Mn-doped BiSe topological insulator
M. R. Mahani, A. Pertsova, M. Fhokru Islam +1
We investigate the properties of a single substitutional Mn impurity and its associated acceptor state on the (111) surface of BiSe topological insulator. Combining ab init…
Trend of the magnetic anisotropy for individual Mn dopants near the (110) GaAs surface
M R Mahani, A Pertsova, C M Canali
Using a microscopic finite-cluster tight-binding model, we investigate the trend of the magnetic anisotropy energy as a function of the cluster size for an individual Mn impurity p…
Magnetic properties of Mn impurities on GaAs (110) surfaces
M. Fhokrul Islam C. M. Canali
We present a computational study of individual and pairs of substitutional Mn impurities on the (110) surface of GaAs samples based on density functional theory. We focus on the an…
Chern number spins of Mn acceptor magnets in GaAs
T. O. Strandberg, C. M. Canali, A. H. MacDonald
We determine the effective total spin of local moments formed from acceptor states bound to Mn ions in GaAs by evaluating their magnetic Chern numbers. We find that when indivi…
Magnetic interactions of substitutional Mn pairs in GaAs
T. O. Strandberg, C. M. Canali, A. H. MacDonald
We employ a kinetic-exchange tight-binding model to calculate the magnetic interaction and anisotropy energies of a pair of substitutional Mn atoms in GaAs as a function of their s…
Magnetic properties of substitutional Mn in (110) GaAs surface and subsurface layers
T. O. Strandberg, C. M. Canali, A. H. MacDonald
Motivated by recent STM experiments, we present a theoretical study of the electronic and magnetic properties of the Mn-induced acceptor level obtained by substituting a single Ga…
Chern-number spin Hamiltonians for magnetic nano-clusters by DFT methods
T. O. Strandberg, C. M. Canali, A. H. MacDonald
Combining field-theoretical methods and ab-initio calculations, we construct an effective Hamiltonian with a single giant-spin degree of freedom, capable of the describing the low-…