Experimentelle Bestimmung grundlegender elektronischer und optischer Eigenschaften neuartiger Supraleiter

• Applicant: Professor Dr. Martin Knupfer
• Subject Area: Experimental Condensed Matter Physics
• Term: from 2009 to 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 104529534

• Final Report Year: 2016

Final Report Abstract

We have successfully applied angular-resolved photoemission spectroscopy (ARPES) to unravel details of the electronic structure of the superconductors Ba1-xKxFe2As2. Our experiments provided evidence for a coupling of the electrons in these materials to spin fluctuation. We have also shown that local electronic correlations – although weak – have to be considered for a full quantitative description of the electronic degrees of freedom. Moreover, we have determined the momentum dependence of the superconducting gap for all Fermi surfaces and found different gap values.

Publications

• New J. Phys. 11, 055069 (2009)
  D.V. Evtushinsky et al.
  
• Phys. Rev. Lett. 102, 167001 (2009)
  A. Koitzsch et al.
  
• Physica C 469 448 (2009)
  V.B. Zabolotnyy et al.
  
• Phys. Rev. B 81, 174519 (2010)
  A. Koitzsch et al.
  
• Physical properties of layered superconductors from angle-resolved photoemission spectroscopy, Dissertation, TU Dresden, 2011
  D.V. Evtushinsky
  
• EPL 100, 27002 (2012)
  A. König et al.
  
• Charge density waves and collective dynamics in the transition metal dichalcogenides: an electron energy-loss study, Dissertation, TU Dresden, 2013
  A. König
  
• Phys. Rev. B 87, 195119 (2013)
  A. König et al.