Publications (67)
Spin wave excitations in low dimensional systems with large magnetic anisotropy
F. Delgado, M. M. Otrokov, A. Arnau
The low energy excitation spectrum of a two-dimensional ferromagnetic material is dominated by single-magnon excitations that show a gapless parabolic dispersion relation with the…
Physical realization of -symmetric potential scattering in a planar slab waveguide
A. Ruschhaupt, F. Delgado, J. G. Muga
A physical realization of scattering by -symmetric potentials is provided: we show that the Maxwell equations for an electromagnetic wave travelling along a planar slab…
Enhanced lifetimes of spin chains coupled to chiral edge states
F. Delgado, J. Fernández-Rossier
We consider spin relaxation of finite-size spin chains exchanged coupled with a one dimensional (1D) electron gas at the edge of a Quantum Spin Hall (QSH) insulator. Spin lifetimes…
Consequences of Kondo exchange on quantum spins
F. Delgado, C. F. Hirjibehedin, J. Fernandez-Rossier
When individual quantum spins are placed in close proximity to conducting substrates, the localized spin is coupled to the nearby itinerant conduction electrons via Kondo exchange.…
Bounds and enhancements for the Hartman effect
J. G. Muga, I. L. Egusquiza, J. A. Damborenea +1
The time of passage of the transmitted wave packet in a tunneling collision of a quantum particle with a square potential barrier becomes independent of the barrier width in a rang…
Spin-transfer torque on a single magnetic adatom
F. Delgado, J. J. Palacios, J. Fernandez-Rossier
We theoretically show how the spin orientation of a single magnetic adatom can be controlled by spin polarized electrons in a scanning tunneling microscope configuration. The under…