Project Details
Projekt
Quantum transport in 3D topological insulator nanostructures
Applicant
Joseph Dufouleur, Ph.D.
Subject Area
Experimental Condensed Matter Physics
Term
from 2013 to 2020
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 239763522
In a 3D TI, the spin-chiral surface states have fascinating properties and their specific 2D nature is of great interest to study Dirac fermions in materials different than graphene. At very low temperature, quantum corrections to the classical conductance like universal conductance fluctuations, weak anti-localisation or, in a more specific geometry, Aharonov-Bohm interferences can be observed in nanostructures, if the phase coherence length of charge carriers is comparable to or larger than the dimensions of a mesoscopic conductor. The aim of this project is to pusrue our work on quantum transport in nanostructures of 3D topolgical insulator and to investigate in detail the very rich physics of quantum interferences based on samples grown by chemical vapor deposition and other technics. Beyond the study of decoherence, mesoscopic transport experiments are also a powerful tool to unveil some fundamental properties of 2D Dirac fermions in a 3D TI (so-called, surface states),such as their spin chirality, their sensitivity to the breaking of timereversal symmetry or the existence of new paticles like Majorana fermions in hybrid structures.
DFG Programme
Priority Programmes
