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Effects of disorder on magnetic vortex gyration
Hongki Min, R. D. McMichael, Jacques Miltat +1
A vortex gyrating in a magnetic disk has two regimes of motion in the presence of disorder. At large gyration amplitudes, the vortex core moves quasi-freely through the disorder po…
Landau Levels and Band Bending in Few-Layer Epitaxial Graphene
Hongki Min, S. Adam, Young Jae Song +3
The carrier density distributions in few-layer-graphene systems grown on the carbon face of silicon carbide can be altered by the presence of a scanning tunneling microscope (STM)…
Semiclassical Boltzmann transport theory for graphene multilayers
Hongki Min, Parakh Jain, S. Adam +1
We calculate the conductivity of arbitrarily stacked multilayer graphene sheets within a relaxation time approximation, considering both short-range and long-range impurities. We t…
Bias dependence of magnetic exchange interactions: application to interlayer exchange coupling in spin valves
Paul M. Haney, Christian Heiliger, Mark D. Stiles
We study how a bias voltage changes magnetic exchange interactions. We derive a general expression for magnetic exchange interactions for systems coupled to reservoirs under a bias…
Ab initio studies of the spin-transfer torque in tunnel junctions
Christian Heiliger, M. D. Stiles
We calculate the spin-transfer torque in Fe/MgO/Fe tunnel junctions and compare the results to those for all-metallic junctions. We show that the spin-transfer torque is interfacia…
Implementation of a non-equilibrium Green's function method to calculate spin transfer torque
Christian Heiliger, Michael Czerner, Bogdan Yu. Yavorsky +2
We present an implementation of the steady state Keldysh approach in a Green's function multiple scattering scheme to calculate the non-equilibrium spin density. This density is us…