Abstract: Transport Coecients Beyond the Relaxation Time Approximation with a Memory Function Approach. For the calculation of transport coecients, the Kubo formula is exact to linear order in the excitation as long as we have the exact Hamiltonian. As we do not have it, the goal is to and approximations that capture physical phenomena of …
Tuesday 17 November (10 AM – 13 PM)M. Reyes Calvo (Alicante, Spain) (10:00 – 10:30)Benoît Hackens (UCL, Belgium) (10:45 – 11:15)Vladimir Juricic (NORDITA, Sweden) (11:30 – 12:00)Diana Dulic (U de Chile, Chile) (12:15 – 12:45) Thursday 19 (2 PM – 5 PM)Paula Giraldo-Gallo (Bogotá, Colombia) (2:00 – 2:30 PM)Luis F. Urrutia (UNAM, México)(2:45 – 3:15 PM)Andrés …
The discovery of topological phases of matter has open up a revival in the study of magnetoelectric media both from a microscopic and a macroscopic perspective. We concentrate on this second topic by discussing a non-dynamical version of axion electrodynamics as the basic effective macroscopic theory describing the electromagnetic response of these materials. The essential …
Desorden y electrostática en el borde de los aislantes topológicos 2D Abstracs:La intercara entre dos materiales semiconductores alberga a menudo estados electrónicos confinados con relevantes aplicaciones tecnológicas. Cuando uno de estos semiconductores presenta además inversión de bandas, aparecen estados de superficie con dispersión lineal y propiedades exóticas de spin. Este escenario, ya predicho en los …
Designing of a “perfect” porphyrin molecule for the Mechanically Controllable Break Junction ExperimentsAbstracts: The biggest challenge of molecular electronics is to condense the functionality of an electronic device into a single molecule and to exploit the functional versatility offered by the chemical diversity of molecules for electronic device purposes. Porphyrins and their related macrocycles are promising …
Optical conductivity in the interacting two-dimensional nodal semimetals Abstract:Dirac and Weyl semimetals feature pseudorelativistic linearly dispersing excitations which give rise to universal signatures in optical conductivity. They are stable for weak electron-electron interactions due to a vanishing density of states at the nodal point. At a strong interaction, however, they can undergo a plethora of …
Scanning gate imaging of charge transport in graphene nanodevices Abstracts:Quantum transport in nanodevices is usually probed thanks to measurements of the electrical resistance or conductance, which lack the spatial resolution necessary to probe local-scale electron behaviour. Here, we will discuss how to get real-space local information on peculiar quantum transport phenomena inside graphene constrictions and …
Probing Broken Symmetries of Quantum Materials by Resonant Ultrasound Spectroscopy Abstract:Determining the broken symmetries at a thermodynamic phase transition is an essential tool for understanding, or at least constraining, the microscopic mechanisms that lead to novel ground states in quantum materials. Resonant Ultrasound Spectroscopy (RUS) is a characterization technique that measures the spectrum of mechanical …
Paula Giraldo-Gallo, Departamento de Física, Universidad de Los Andes, Bogotá, Colombia Leer más »
Materiales bidimensionales semiconductores: síntesis, propiedades y aplicaciones Abstract:Durante esta plática daré un panorama general sobre las actividades de investigación que realiza nuestro grupo de investigación del CINVESTAV-Unidad Querétaro en el área de materiales 2D. Particularmente, mostraré la técnica de crecimiento basada en el depósito química en fase de vapor a presión atmosférica (APCVD) para sintetizar diferentes dicalcogenuros …
