Institut für Theoretische Physik III
Forschung

Allgemeine Beschreibung des Projektes A5

Project: Mesocopic transport of Dirac fermions
Kontakt:
Prof. K. Efetov
Theoretische Physik III

Ruhr-Universität Bochum
Universitätstrasse 150
44780 Bochum

Tel.: (02 34) 32 - 2 37 37
Fax: (02 34) 32 - 1 44 48
Prof. Dr. Ilya Eremin
Theoretische Physik III

Ruhr-Universität Bochum
Universitätstrasse 150
44780 Bochum

Tel.: (02 34) 32 - 2 66 04
Fax: (02 34) 32 - 1 44 48

Zusammenfassung:
Dirac-Spectrum Dirac fermions play a crucial role in modern condensed matter physics. Two of the most exciting recent developments in mesoscopic physics — represented by graphene monolayers and by the topological insulator (TI) phase of strongly spin-orbit coupled materials — are characterized by quasi-particles with linear dispersion that can be described by a two-dimensional (2D) Dirac Hamiltonian at low energy scales.

A wealth of novel physical phenomena can be anticipated, while at the same time many fundamental questions need to be addressed. For instance, when a TI is contacted by nearby superconductors or ferromagnets, exotic Majorana fermion states can be induced, while the presence of electron-electron or electron-phonon interactions defines new many-body problems awaiting their theoretical (and experimental) investigation.

Specifically, we propose to study fundamentally oriented as well as more applied subprojects. The problem of classifying topological insulators when interactions are present will be studied within a mathematics-physics collaboration.

We also want to advance the quantum transport theory of interacting Dirac fermions in TI quantum dots and/or graphene dots. Moreover, we plan to analyze the effects of phonons on the conductivity of Dirac surface fermions in a TI, as well as the proximity-induced superconductivity and Majorana zero modes in such materials. We also wish to better understand non-stationary effects in irradiated graphene pn junctions, and we plan to develop a bosonization scheme for Dirac fermions.


Aktuelles


  • Projekt A5 ist erfolgreich evaluiert worden und wurde für die nächsten 4 Jahre verlängert.

    Während der nächsten Förderungsdauer wird das Studium der Dirac'schen Fermionen im Graphen und auch in den kürzlich entdeckten topologischen Isolatoren und Supraleitern fortgesetzt.