"Ballistic transport in 2D materials"

"Ballistic transport in 2D materials"



In this talk I will show some recent research on charge carrier transport in 2d materials in the ballistic regime carried out in the Condensed Matter Theory Group at UFC. One important feature of 2d materials such as graphene and analogs is the long phase coherence length of electrons and holes, which may allow the observation of phase coherence effects in larger samples and temperatures than in previous systems. One of the theoretical approaches employed by our group use microscopic tight binding models together with numerical calculations using the KWANT Python package to obtain the conductance of nanoscale devices in graphene, phosphorene and other 2d materials. These results highlight the striking analogy between optics and electronic propagation in graphene. Another method to be shown is the split-operator technique, which permits the study of the time evolution of wavepackets in nano structures. In particular, I will present results for the interaction of electrons in graphene with a time-dependent potential barrier, the use of gates as phase modulators in quantum rings, as well as the scattering of wavepackets in phosphorene grain boundaries.


Transmisión vía Youtube en: bit.ly/YouTube_ICF



Participante: Dr. João Milton Pereira Jr.

Institución: Universidade Federal do Ceará, Brazil

Fecha y hora: Este evento terminó el Miércoles, 23 de Junio de 2021