Nematic Susceptibility of Hole-Doped and Electron-Doped BaFe2As2 Iron-Based Superconductors from Shear Modulus Measurements
- Author(s)
- A. E. Böhmer, P. Burger, F. Hardy, T. Wolf, P. Schweiss, R. Fromknecht, M. Reinecker, W. Schranz, C. Meingast
- Abstract
The nematic susceptibility, χφ, of hole-doped Ba1−xKxFe2As2 and electron-doped Ba(Fe1−xCox)2As2
iron-based superconductors is obtained from measurements of the elastic
shear modulus using a three-point bending setup in a capacitance
dilatometer. Nematic fluctuations, although weakened by doping, extend
over the whole superconducting dome in both systems, suggesting their
close tie to superconductivity. Evidence for quantum critical behavior
of χφ is, surprisingly, only found for Ba(Fe1−xCox)2As2 and not for Ba1−xKxFe2As2—the system with the higher maximal Tc value.
- Organisation(s)
- Physics of Functional Materials
- External organisation(s)
- Karlsruher Institut für Technologie
- Journal
- Physical Review Letters
- Volume
- 112
- No. of pages
- 5
- ISSN
- 0031-9007
- DOI
- https://doi.org/10.1103/PhysRevLett.112.047001
- Publication date
- 01-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Keywords
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/nematic-susceptibility-of-holedoped-and-electrondoped-bafe2as2-ironbased-superconductors-from-shear-modulus-measurements(c5fad9f0-5f1d-4317-86c2-e4334c12eb02).html