Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 54: Fe-based Superconductors
TT 54.4: Vortrag
Donnerstag, 19. März 2020, 10:15–10:30, HSZ 201
Tracking nematic fluctuations using the Nernst effect in iron based superconductors — •Christoph Wuttke1, Federico Caglieris1, Steffen Sykora1, Frank Steckel1, Xiaochen Hong1, Seunghyun Kim1, Rhea Kappenberger1, Saicharan Aswartham1, Sabine Wurmehl1, Sheng Ran2, Paul C. Canfield2, Bernd Büchner1,3,4, and Christian Hess1,4 — 1Leibniz-Institute for Solid State and Materials Research, IFW-Dresden, 01069 Dresden, Germany — 2Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA — 3Institut für Festkörperphysik, TU Dresden, 01069 Dresden, Germany — 4Center for Transport and Devices, Technische Universität Dresden, 01069 Dresden, Germany
The role of nematic fluctuations, shown to be present across the phase diagram of iron based superconductors, especially their correlation with possible quantum critical points and high temperature superconductivity, has been under constant debate. Here we show that the Nernst coefficient is sensitive to the nematic fluctuations in iron based superconductors. We detect a similar behavior of the Nernst effect and elastoresistivity measurements in Co doped LaFeAsO while a difference of these probes can be obtained in Rh doped BaFe2As2. In both materials the Nernst effect is tracking the superconducting dome upon doping, providing evidence for superconductivity supported by nematic fluctuations.