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12 papers · 1 filter
Exciton band structure in two-dimensional materials
Pierluigi Cudazzo, Lorenzo Sponza, Christine Giorgetti +3
Low-dimensional materials differ from their bulk counterpart in many respects. In particular, the screening of the Coulomb interaction is strongly reduced, which can have important…
Ultrafast photocurrents at the surface of the three-dimensional topological insulator
Lukas Braun, Gregor Mussler, Andrzej Hruban +6
Topological insulators constitute a new and fascinating class of matter with insulating bulk yet metallic surfaces that host highly mobile charge carriers with spin-momentum lockin…
Giant Forward Scattering Asymmetry and Anomalous Tunnel Hall effect at Spin-Orbit-and Exchange-Split Interfaces
T. Huong Dang, H. Jaffrès, T. L. Hoai Nguyen +1
We report on theoretical investigations of scattering asymmetry vs. incidence of carriers through exchange barriers and magnetic tunnel junctions made of semiconductors involving s…
Resonant optical control of the structural distortions that drive ultrafast demagnetization in CrO
Vera G. Sala, Stefano Dal Conte, Timothy A. Miller +5
We study how the color and polarization of ultrashort pulses of visible light can be used to control the demagnetization processes of the antiferromagnetic insulator CrO. W…
Wannier interpolation of the electron-phonon matrix elements in polar semiconductors: Polar-optical coupling in GaAs
J. Sjakste, N. Vast, M. Calandra +1
We generalize the Wannier interpolation of the electron-phonon matrix elements to the case of polar-optical coupling in polar semiconductors. We verify our methodological developme…
Electron acceleration by relativistic surface plasmons in laser-grating interaction
Luca Fedeli, Andrea Sgattoni, Giada Cantono +9
The generation of energetic electron bunches by the interaction of a short, ultra-intense () laser pulse with "grating" targets has been investigated in…