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8 papers · 2 filters
Magneto-optical spaser
D. G. Baranov, A. P. Vinogradov, A. A. Lisyansky +2
We present an electrodynamical model of a novel quantum plasmonic device - magneto-optical spaser. It is shown that a spherical gain nanoparticle coated with a metallic magneto-opt…
Imaging currents in HgTe quantum wells in the quantum spin Hall regime
Katja C. Nowack, Eric M. Spanton, Matthias Baenninger +10
The quantum spin Hall (QSH) state is a genuinely new state of matter characterized by a non-trivial topology of its band structure. Its key feature is conducting edge channels whos…
RKKY interaction in gapped or doped graphene
E. Kogan
In our previous work (E. Kogan, Phys. Rev. B {\bf 84}, 115119 (2011)) we calculated RKKY interaction between two magnetic impurities in pristine graphene using the Green's function…
Indication for macroscopic quantum tunneling below 10 K in nanostructures of SrRuO3
Omer Sinwani, James W. Reiner, Lior Klein
We study magnetization reversal of nanostructures of the itinerant ferromagnet SrRuO3 (Tc~150 K). We find that down to 10 K the magnetization reversal is dominated by thermal activ…
Entanglement entropy in one-dimensional disordered interacting system: The role of localization
Richard Berkovits
The properties of the entanglement entropy (EE) in one-dimensional disordered interacting systems are studied. Anderson localization leaves a clear signature on the average EE, as…
Entanglement entropy and quantum phase transitions in quantum dots coupled to Luttinger liquid wires
Moshe Goldstein, Yuval Gefen, Richard Berkovits
We study a quantum phase transition which occurs in a system composed of two impurities (or quantum dots) each coupled to a different interacting (Luttinger-liquid) lead. While the…