Dresden 2014 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 101: Theoretical advances in interacting topological phases (organized by TT)

HL 101.7: Vortrag

Donnerstag, 3. April 2014, 18:05–18:25, HSZ 03

From fractionally charged solitons to Majorana bound states in a one-dimensional interacting model — •Frank Pollmann1, Doru Sticlet1,2, Luis Seabra1,3, and Jerome Cayssol1,21Max-Planck-Institute for the Physics of Complex Systems, Dresden, Germany — 2CNRS and University Bordeaux, Talence, France — 3Technion, Haifa, Israel

We investigate the one-dimensional Creutz model in the presence of induced superconductivity and Hubbard type interactions. We show that zero-energy Majorana edge modes develop in the presence of superconducting pairing for a certain range of parameters. Additionally, the system hosts regular electronic zero-energy modes in a trivial superconducting phase. We study the effect of interactions using a combination of density matrix renormalization group (DRMG) methods and mean field theory. It is shown how local repulsive interactions expand the parameter range for which a topological Majorana phase is stabilized. In contrast, we find that interactions remove the zero-energy modes found in the trivial superconducting phase.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2014 > Dresden