Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 45: Superconductivity: Fe-based Superconductors - 1111,111, FeSe
TT 45.2: Vortrag
Dienstag, 1. April 2014, 14:15–14:30, HSZ 201
Effects of hydrostatic pressure on the superconducting properties of LaFeAsO1−xFx — •Giacomo Prando1, Wolf Schottenhamel1, Samuele Sanna2, Rustem Khasanov3, Zurab Guguchia4, Anja Wolter-Giraud1, Sabine Wurmehl1,5, and Bernd Büchner1,5 — 1Leibniz-Institut für Festkörper- und Werkstoffforschung (IFW) Dresden, Germany — 2Dipartimento di Fisica and Unità CNISM di Pavia, Università di Pavia, Italy — 3Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland — 4Physik-Institut der Universität Zürich, Winterthurerstrasse 190, Switzerland — 5Institut für Festkörperphysik, Technische Universität Dresden, Germany
The most typical way of sweeping the electronic phase diagram of 1111 oxy-pnictides is to induce a gradual charge doping via chemical substitutions such as, e. g., out-of-plane O1−xFx or in-plane Fe1−xCox. However, it is well known that external pressure qualitatively mimics the charge doping across the whole phase diagram. In this contribution we will review the effect of pressure in LaFeAsO1−xFx under different conditions of chemical doping x as examined by means of µ+ spin spectroscopy. The suppression of the magnetic phase in the undoped compound will be addressed [1] as well as the phase segregation achieved at the crossover between magnetism and superconductivity [2]. Recent studies will be reported dealing with the superconducting side of the phase diagram. The evolution of both the critical temperature and the superfluid density will be discussed in detail.
R. De Renzi et al., Supercond. Sci. Technol. 25 084009 (2012)
R. Khasanov et al., Phys. Rev. B 84 100501 (2011)