Journal article
+ 1 other files
Infrared study of the spin reorientation transition and its reversal in the superconducting state in underdoped ${\mathrm{Ba}}_{1-x}{\mathrm{K}}_{x}{\mathrm{Fe}}_{2}{\mathrm{As}}_{2}$
-
Mallett, B. P. P.
University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Fribourg, Switzerland
-
Marsik, Premysl
University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Fribourg, Switzerland
-
Yazdi-Rizi, M.
University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Fribourg, Switzerland
-
Wolf, Th.
Institute of Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
-
Böhmer, A. E.
Institute of Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
-
Hardy, F.
Institute of Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
-
Meingast, C.
Institute of Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
-
Munzar, Dominik
Department of Condensed Matter Physics, Faculty of Science and Central European Institute of Technology, Masaryk University, Brno, Czech Republic
-
Bernhard, Christian
University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Fribourg, Switzerland
Show more…
Published in:
- Physical Review Letters. - 2015, vol. 115, no. 2, p. 027003
English
With infrared spectroscopy we investigated the spin-reorientation transition from an orthorhombic antiferromagnetic (o-AF) to a tetragonal AF (t-AF) phase and the reentrance of the o-AF phase in the superconducting state of underdoped Ba1−xKxFe2As2. In agreement with the predicted transition from a single-Q to a double-Q AF structure, we found that a distinct spin density wave develops in the t-AF phase. The pair breaking peak of this spin density wave acquires much more low-energy spectral weight than the one in the o-AF state which indicates that it competes more strongly with superconductivity. We also observed additional phonon modes in the t-AF phase which likely arise from a Brillouin-zone folding that is induced by the double-Q magnetic structure with two Fe sublattices exhibiting different magnitudes of the magnetic moment.
-
Faculty
- Faculté des sciences et de médecine
-
Department
- Département de Physique
-
Language
-
-
Classification
-
Physics
-
License
-
License undefined
-
Identifiers
-
-
Persistent URL
-
https://folia.unifr.ch/unifr/documents/304628
Other files
Statistics
Document views: 52
File downloads:
- ber_iss.pdf: 66
- ber_iss_sm.pdf: 48