Prof.
Gustau Catalan
(ICREA and ICN2)
18/07/2017, 15:00
Quantum Materials and Technologies (GEFES)
Bending a dielectric material of any symmetry generates polarization thanks to the so-called flexoelectric effect. Conversely, applying a voltage to a dielectric material will cause it to bend spontaneously, due to the converse (or inverse) flexoelectric effect. Both direct and inverse flexoelectricity scale up with the inverse of the thickness of the material, so this phenomenon is gaining...
Mr.
Jose Lado
(International Iberian Nanotechnology Laboratory)
18/07/2017, 15:30
Quantum Materials and Technologies (GEFES)
The observation of ferromagnetic order in a monolayer of CrI 3 has been recently reported,
with a Curie temperature of 45 Kelvin and off-plane easy axis. Here we study the origin of magnetic
anisotropy, a necessary ingredient to have magnetic order in two dimensions, combining two levels
of modeling, density functional calculations and spin model Hamiltonians. We find two...
Dr.
Nicolo Accanto
(CNRS, Paris Descartes Univerity)
18/07/2017, 16:00
Quantum Materials and Technologies (GEFES)
Optical nano-antennas have the capability to control the localisation of light on nanometer spatial scales. Coherent control on the other hand, is a technique that often uses femtosecond laser pulses to control light matter-interactions on an ultrafast time scale. Here, we combine ultrafast coherent control with the investigation of nonlinear optical responses in individual plasmonic...
Ms.
Lucía Iglesias
(PhD Student)
18/07/2017, 17:30
Quantum Materials and Technologies (GEFES)
The control and tune of the cationic and anionic defects formation is a novel route to discover new functional properties in transition metal oxides in general, and particularly in SrTiO3 [1]. STO is a diamagnetic quantum paraelectric insulator, in which oxygen vacancies are typical anionic defects. Due to the donor character of the VO and the very large electron mobilities of these defects,...
Dr.
Javier Tornos
(Instituto de Ciencia de Materiales Madrid - CSIC)
18/07/2017, 17:50
Quantum Materials and Technologies (GEFES)
Harnessing the electronic response of ferroelectric thin films may be key in the realization of the visionary concept “The Wall is the Device” [1] towards future non-volatile memories, logic elements or energy-harvesting devices. While extensive work has been devoted to exploit the technological opportunities of the ferroelectric ground state in ultrathin films, and to understand the nature...
Dr.
Fernández Cortijo
(Instituto de Ciencia de Materiales de Madrid, CSIC)
18/07/2017, 18:10
Quantum Materials and Technologies (GEFES)
Weyl and Dirac semimetals are topologically nontrivial metallic systems. Many transport and optical properties of these systems display signatures of their nontrivial topological nature, even being dissipative.
Here we will demonstrate that Weyl semimetals display a rather exotic response called "magnetochiral effect" appearing in chiral systems under the effect of external magnetic fields....
Dr.
Flavio Bruno
(Department of Quantum Matter Physics, University of Geneva, Switzerland.)
18/07/2017, 18:30
Quantum Materials and Technologies (GEFES)
The discovery of non-saturating magnetoresistance and pressure induced superconductivity has drawn much attention to WTe2 lately. [1] The interest on this material increased when it was very recently proposed to be the first example of a new class of materials dubbed type-II Weyl semimetals.[2] The electronic band structure of a type-II Weyl semimetal shows tilted Weyl cones that arise from...
Dr.
Carlos ANTON SOLANAS
(Center of Nanosciences and Nanotechnology (C2N), CNRS, University Paris-Sud, University Paris-Saclay, C2N Marcoussis, Marcoussis, France)
18/07/2017, 18:50
Quantum Materials and Technologies (GEFES)
We report on the polarization tomography of a resonantly-driven quantum-dot cavity-QED device. A single quantum-dot excitonic transition induces a macroscopic rotation on the polarization of the reflected photons, with a polarization purity remaining above 84%.
