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10 papers · 2 filters
Semiconductor quantum ring as a solid-state spin qubit
Elzbieta Zipper, Marcin Kurpas, Janusz Sadowski +1
The implementation of a spin qubit in a quantum ring occupied by one or a few electrons is proposed. Quantum bit involves the Zeeman sublevels of the highest occupied orbital. Such…
Canyon of Current Suppression in an interacting two-level Quantum Dot
O. Karlström, J. N. Pedersen, P. Samuelsson +1
Motivated by the recent discovery of a canyon of conductance suppression in a two-level equal spin quantum dot system [Phys. Rev. Lett. , 186804 (2010)] the transport thr…
Thermoelectric efficiency at maximum power in low-dimensional systems
Natthapon Nakpathomkun, Hongqi Q. Xu, Heiner Linke
Low-dimensional electronic systems in thermoelectrics have the potential to achieve high thermal-to-electric energy conversion efficiency. A key measure of performance is the effic…
Signatures of Wigner Localization in Epitaxially Grown Nanowires
L. H. Kristinsdóttir, J. C. Cremon, H. A. Nilsson +5
It was predicted by Wigner in 1934 that the electron gas will undergo a transition to a crystallized state when its density is very low. Whereas significant progress has been made…
Valley-dependent Brewster angles and Goos-Hanchen effect in strained graphene
Zhenhua Wu, F. Zhai, F. M. Peeters +2
We demonstrate theoretically how local strains in graphene can be tailored to generate a valley polarized current. By suitable engineering of local strain profiles, we find that el…
Strain in Semiconductor Core-Shell Nanowires
Johan Grönqvist, Niels Søndergaard, Fredrik Boxberg +3
We compute strain distributions in core-shell nanowires of zinc blende structure. We use both continuum elasticity theory and an atomistic model, and consider both finite and infin…