Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 27: SC: Fe-based Superconductors - LiFeAs
TT 27.2: Vortrag
Dienstag, 15. März 2011, 14:15–14:30, HSZ 304
Influence of doping on the physical properties of LiFeAs — •Luminita Harnagea1, Claudia Nacke1, Igor Morozov1,2, Dirk Bombor1, Anne Bachmann1, Uwe Gräfe1, Yannic Utz1, Mahmoud Abdel-Hafiez1, Seung-Ho Baek1, Ulrike Stockert1,3, Rüdiger Klingeler1,4, Anja U.B. Wolter1, Hans-Joachim Grafe1, Christian Hess1, Sabine Wurmehl1, and Bernd Büchner1 — 1Institute for Solid State Research, IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany — 2Moscow State University, Moscow 119991, Russia — 3MPI for Chemical Physics of Solids, D-01187 Dresden, Germany — 4Kirchhoff Institute for Physics, Heidelberg University, D-69120 Heidelberg, Germany
Single crystals of LiFe1−xMxAs (M = Cr, Rh, Ni) were grown using the self-flux method. The parent compound LiFeAs is an unconventional superconductor with a transition temperature of about 17 K. Upon doping on the Fe site with Rh, Ni or Cr the superconductivity is suppressed, which is reflected in different physical properties. This observation is in contrast to the effect of doping in the NaFeAs homologous and in other Fe-based superconductor families, where the superconductivity is induced or/and stabilized by replacing Fe either by Rh or Ni.