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17 papers · 1 filter
Coherently photo-induced ferromagnetism in diluted magnetic semiconductors
J. Fernández-Rossier, C. Piermarocchi, P. Chen +2
Ferromagnetism is predicted in undoped diluted magnetic semiconductors illuminated by intense sub-bandgap laser radiation . The mechanism for photo-induced ferromagnetism is cohere…
A newly identified Luminous Blue Variable in the galactic starburst cluster Westerlund 1
J. Simon Clark, Ignacio Negueruela
We present observations of the massive transitional star W243 in Westerlund 1. We find an apparent spectral type of early-mid A from our data, in contrast to an earlier classificat…
Influence of a Uniform Current on Collective Magnetization Dynamics in a Ferromagnetic Metal
J. Fernandez-Rossier, M. Braun, A. S. Núñez +1
We discuss the influence of a uniform current, , on the magnetization dynamics of a ferromagnetic metal. We find that the magnon energy has a current-induced…
High-bias stability of monatomic chains
R. H. M. Smit, C. Untiedt, J. M. van Ruitenbeek
For the metals Au, Pt and Ir it is possible to form freely suspended monatomic chains between bulk electrodes. The atomic chains sustain very large current densities, but finally f…
Convection in protoneutron stars and the structure of surface magnetic fields in pulsars
V. Urpin, J. Gil
We consider generation and evolution of small-scale magnetic fields in neutron stars. These fields can be generated by small-scale turbulent dynamo action soon after the collapse w…
Electronic transport and vibrational modes in the smallest molecular bridge: H2 in Pt nanocontacts
Yamila Garcia, J. J. Palacios, E. San Fabian +3
We present a state-of-the-art first-principles analysis of electronic transport in a Pt nanocontact in the presence of H2 which has been recently reported by Smit et al. in Nature…