DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – wissenschaftliches Programm

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

TT: Fachverband Tiefe Temperaturen

TT 52: Superconductivity: Fe-based Superconductors - FeSe and LiFeAs

TT 52.11: Vortrag

Mittwoch, 14. März 2018, 12:15–12:30, HFT-FT 101

Electron-boson interaction of LiFeAs revealed by resonantly enhanced Friedel oscillations: ExperimentZhixiang Sun1, Pranab Kumar Nag1, Steffen Sykora1, Jose M. Guevara1, Rhea Kappenberger1, Sabine Wurmehl1,2, Bernd Büchner1,2,3, and •Christian Hess1,31IFW Dresden, 01069 Dresden, Germany — 2Institute for Solid State Physics, TU Dresden, 01069 Dresden, Germany — 3Center for Transport and Devices, TU Dresden, 01069 Dresden, Germany

For rationalizing the Cooper pairing mechanism in a superconductor, it is central to identify bosons interacting with the conduction electrons. We determine the energy and momentum characteristics of such bosons in LiFeAs by exploiting the boson-assisted resonant amplification of Friedel oscillations by Fourier transform scanning tunneling spectroscopy (FT-STS). We show that the FT-STS signatures of the bosonic states survive in the normal state, and, moreover, that they are in perfect agreement with well-known strong above-gap anomalies in independently measured tunneling spectra at the very same energy. Thus, the small-momentum bosonic modes are promising candidates for providing the pairing interaction in LiFeAs.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin