65 citations · 682 across the 37 of their papers we have counts for
12 papers · 1 filter
Strain-controlled topology and quantum control at a cubic Ce crystal-field crossing
A. Ghosh, J. T. Haraldsen
Field-tuned crystal-field crossings provide a route to synthetic topology in localized rare-earth degrees of freedom when symmetry-resolved perturbations can independently control…
General structure factor and dynamic effects of the Dzyaloshinskii-Moriya interaction in S = 1/2 clusters
Evan M. Wilson, Joseph A. Prescott, Jason T. Haraldsen
Understanding the effects of the Dzyaloshinskii-Moriya interaction (DMI) has become increasingly important in the context of nanoscale magnetism and spintronics. In this study, we…
Exact eigenvalues and experimental signatures of Heisenberg-Kitaev interactions in spin-1/2 quantum clusters
Evan M. Wilson, Jian-Xin Zhu, Jason T. Haraldsen
We investigate the thermodynamics and energy eigenstates of a spin-1/2 coupled trimer, tetramer in a star configuration, and tetrahedron. Using a Heisenberg Hamiltonian with additi…
Designing a path towards superconductivity through magnetic exchange in transition-metal intercalated bilayer graphene
Kevin P. Lucht, A. D. Mahabir, A. Alcantara +3
This study examines the potential of superconductivity in transition metal (TM) intercalated bilayer graphene through a systematic study of the electronic and magnetic properties.…
Spatial dependence of the superexchange interactions for transition-metal trimers in graphene
Charles B. Crook, Gregory Houchins, Jian-Xin Zhu +3
This study examines the magnetic interactions between spatially-variable manganese and chromium trimers substituted into a graphene superlattice. Using density functional theory, w…
Evolution of the thermodynamic properties and inelastic neutron scattering intensities for spin-1/2 antiferromagnetic quantum rings
J. T. Haraldsen
This study examines the increasing complexity in the magnetic properties of small = 3, 4, 5, 6 spin-1/2 quantum rings. Using an exact diagonalization of the isotropic Heisenber…
Voltage-dependent spin flip in magnetically-substituted graphene nanoribbons: Toward the realization of graphene-based spintronic devices
Gregory Houchins, Charles B. Crook, Jian-Xin Zhu +2
We examine the possibility of using graphene nanoribbons (GNRs) with directly substituted chromium atoms as spintronic device. Using density functional theory, we simulate a voltag…
Computational investigation of the electronic and optical properties of planar Ga-doped Graphene
Nicole Creange, Costel Constantin, Jian-Xin Zhu +2
We simulate the optical and electrical responses in gallium-doped graphene. Using density functional theory with a local density approximation, we simlutate the electronic band str…
Proximity-induced magnetism in transition-metal substituted graphene
Charles B. Crook, Costel Constantin, Towfiq Ahmed +3
We investigate the interactions between two identical magnetic impurities substituted into a graphene superlattice. Using a first-principles approach, we calculate the electronic a…
The Spin State and Spectroscopic Modes of Multiferroic BiFeO3
Randy S. Fishman, Jason T. Haraldsen, Nobuo Furukawa +1
Spectroscopic modes provide the most sensitive probe of the very weak interactions responsible for the properties of the long-wavelength cycloid in the multiferroic phase of \BF be…
Magnetic excitations in the geometric frustrated multiferroic CuCrO
M. Frontzek, J. T. Haraldsen, A. Podlesnyak +9
In this paper detailed neutron scattering measurements of the magnetic excitation spectrum of CuCrO in the ordered state below K are presented. The spectra a…
Spin-lozenge thermodynamics and magnetic excitations in NaRuO
J. T. Haraldsen, M. B. Stone, M. D. Lumsden +5
We report inelastic and elastic neutron scattering, magnetic susceptibility, and heat capacity measurements of polycrystalline sodium ruthenate (NaRuO). Previous work sugge…