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Author
S. Thirupathaiah
E.D.L. Rienks
H.S. Jeevan
R. Ovsyannikov
E. Slooten
J. Kaas
E. van Heumen
S. de Jong
H.A. Dürr
K. Siemensmeyer
R. Follath
P. Gegenwart
M.S. Golden
J. Fink
Year
2010
Title
Dissimilarities between the electronic structure of chemically doped and chemically pressurized iron pnictides from an angle-resolved photoemission spectroscopy study
Number of pages
5
Publisher
Berlin: Helmholtz-Zentrum Berlin
Document type
Working paper
Faculty
Faculty of Science (FNWI)
Institute
Van der Waals-Zeeman Institute (WZI)
Abstract
We have studied the electronic structure of EuFe2As2-xPx using high resolution angle-resolved photoemission spectroscopy. Upon substituting As with the isovalent P, which leads to a chemical pressure and to superconductivity, we observe a non-rigid-band like change of the electronic structure along the center of the Brillouin zone (BZ): an orbital and kz dependent increase or decrease in the size of the hole pockets near the Gamma-Z line. On the other hand, the diameter of the Fermi surface cylinders at the BZ corner forming electron pockets, hardly changes. This is in stark contrast to p and n-type doped iron pnictides where, on the basis of ARPES experiments, a more rigid-band like behavior has been proposed. These findings indicate that there are different ways in which the nesting conditions can be reduced causing the destabilization of the antiferromagnetic order and the appearance of the superconducting dome.
Link
Link
Language
English
Permalink
http://hdl.handle.net/11245/1.333941

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