Weak low-temperature polarity in a
single crystal
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Published in Physical Review B
...
Electric-field-induced phase transition and electrocaloric effect in PMN-PT
Published in Physical Review B
Ferroelectric perovskite oxides possess a large electrocaloric (EC) effect, but usually at high temperatures near the ferroelectric/paraelectric phase transition temperature, which limits their potential application as next-generation solid-state cooling devices. We use classical molecular dynamics to study the electric-field-induced phase transiti...
Symmetry-selected spin-split hybrid states in C 60 / ferromagnetic interfaces
Published in Physical Review B
The understanding of orbital hybridization and spin-polarization at the organic-ferromagnetic interface is essential in the search for efficient hybrid spintronic devices. Here, using first-principles calculations, we report a systematic study of spin-split hybrid states of C$_{60}$ deposited on various ferromagnetic surfaces: bcc-Cr(001), bcc-Fe(0...
Time reversal sub-wavelength focusing in bubbly media
Published in Physical Review B
Thanks to a Multiple Scattering Theory algorithm, we present a way to focus energy at the deep subwavelength scale, from the far-field, inside a cubic disordered bubble cloud by using broadband Time Reversal (TR). We show that the analytical calculation of an effective wavenumber performing the Independant Scattering Approximation (ISA) matches the...
Nature of the bias-dependent symmetry reduction of iron phthalocyanine on Cu (111)
...Published in Physical Review B
Quantum model of coupled intersubband plasmons
Published in Physical Review B
We present a quantum model to calculate the dipole-dipole coupling between electronic excitations in the conduction band of semiconductor quantum wells. We demonstrate that the coupling depends on a characteristic length, related to the overlap between microscopic current densities associated with each electronic excitation. As a result of the coup...
Strong anisotropic influence of local-field effects on the dielectric response of α-MoO3
Published in Physical Review B
Dielectric properties of {\alpha}-MoO3 are investigated by a combination of valence electron-energy loss spectroscopy and ab initio calculation at the random phase approximation level with the inclusion of local-field effects (LFE). A meticulous comparison between experimental and calculated spectra is performed in order to interpret calculated die...
Mesoscopic thermoelectric transport near zero transmission energies
Published in Physical Review B
We study the thermoelectric transport coefficients of a one-dimensional (1D) electron waveguide connected to one and then two off-channel cavities, in the presence of dephasing phonons. The model system is that of a linear chain described as a 1D lattice. For simplicity we consider single-mode cavities, which may be tuned with external gates. While...
Intersubband electroluminescent devices operating in the strong coupling regime
Published in Physical Review B
We present a detailed study of the electroluminescence of intersubband devices operating in the light-matter strong coupling regime. The devices have been characterized by performing angle resolved spectroscopy that shows two distinct light intensity spots in the momentum-energy phase diagram. These two features of the electroluminescence spectra a...
Thermally assisted tunneling transport in La0.7Ca0.3MnO3/SrTiO3:Nb Schottky-like heterojunctions
Published in Physical Review B
