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5 papers · 1 filter
Unified picture of superfluidity: From Bogoliubov's approximation to Popov's hydrodynamic theory
N. Dupuis
Using a non-perturbative renormalization-group technique, we compute the momentum and frequency dependence of the anomalous self-energy and the one-particle spectral function of tw…
Superfluid to Mott-insulator transition of cold atoms in optical lattices
N. Dupuis, K. Sengupta
We review the superfluid to Mott-insulator transition of cold atoms in optical lattices. The experimental signatures of the transition are discussed and the RPA theory of the Bose-…
Electrical rectification effect in single domain magnetic microstrips: a micromagnetics-based analysis
Andre Thiaville, Yoshinobu Nakatani
Upon passing an a.c. electrical current along magnetic micro- or nanostrips, the measurement of a d.c. voltage that depends sensitively on current frequency and applied field has b…
Electronic transport in iron atomic contacts: from the infinite wire to realistic geometries
Gabriel Autes, Cyrille Barreteau, Daniel Spanjaard +1
We present a theoretical study of spin polarized transport in Fe atomic contacts using a self-consistent tight-binding Hamiltonian in a non-orthogonal , and basis set, t…
Charge density wave in graphene: magnetic-field-induced Peierls instability
Jean-Noël Fuchs, Pascal Lederer
We suggest that a magnetic-field-induced Peierls instability accounts for the recent experiment of Zhang et al. in which unexpected quantum Hall plateaus were observed at high magn…