38 citations · 135 across the 12 of their papers we have counts for
10 papers · 1 filter
Superorders and acoustic modes folding in BiFeO/LaFeO superlattices
R. Gu, R. Xu, F. Delodovici +18
Superlattices are materials created by the alternating growth of two chemically different materials. The direct consequence of creating a superlattice is the folding of the Brillou…
Anisotropy in the dielectric function of BiTe from first principles: From the UV-visible to the infrared range
R. Busselez, A. Levchuk, P. Ruello +2
The dielectric properties of BiTe, a layered compound crystallizing in a rhombohedral structure, are investigated by means of first-principles calculations at the random ph…
Non-thermal transport of energy driven by photoexcited carriers in switchable solid states of GeTe
R. Gu, T. Perrault, V. Juvé +10
Phase change alloys have seen widespread use from rewritable optical discs to the present day interest in their use in emerging neuromorphic computing architectures. In spite of th…
Ultrafast light-induced shear strain probed by time-resolved X-ray diffraction: the model multiferroic BiFeO as a case study
V. Juvé, R. Gu, S. Gable +12
Enabling the light-control of complex systems on ultra-short timescales gives rise to rich physics with promising applications. While crucial, the quantitative determination of bot…
On the magnetoelastic and magnetoelectric couplings across the antiferromagnetic transition in multiferroic BiFeO3
Mariusz Lejman, Charles Paillard, Vincent Juvé +7
Clear anomalies in the lattice thermal expansion (deviation from linear variation) and elastic properties (softening of the sound velocity) at the antiferromagnetic-to-paramagnetic…
Exciton Control in a Room-Temperature Bulk Semiconductor with Coherent Strain Pulses
Edoardo Baldini, Adriel Dominguez, Tania Palmieri +4
The coherent manipulation of excitons in bulk semiconductors via the lattice degrees of freedom is key to the development of acousto-optic and acousto-excitonic devices. Wide-bandg…
Ultrafast non-thermal laser excitation of gigahertz longitudinal and shear acoustic waves in spin-crossover molecular crystals []
T. Parpiiev, M. Servol, M. Lorenc +6
We report GHz longitudinal as well as shear acoustic phonons photoexcitation and photodetection using femtosecond laser pulses in a spin-crossover molecular crystal. From our exper…
Ultrafast Acousto-Plasmonics in Gold Nanoparticles Superlattice
P. Ruello, A. Ayouch, G. Vaudel +5
We report the investigation of the generation and detection of GHz coherent acoustic phonons in plasmonic gold nanoparticles superlattices (NPS). The experiments have been performe…
Ultrafast light-induced Coherent Optical and Acoustic Phonons in few Quintuple Layers of Topological Insulators Bi2Te3
W. Weiss, K. Balin, R. Rapacz +4
Ultrafast lattice dynamics of few quintuple layers of topological insulator (TI) BiTe is studied with time-resolved optical pump-probe spectroscopy. Both optical and acoust…
Coherent acoustic phonons emission in copper driven by super-diffusive hot electrons
M. Lejman, V. Shalagatsky, A. Kovalenko +3
Ultrafast laser excited hot electrons can transport energy supersonically far from the region where they are initially produced. We show that this ultrafast energy transport is res…