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Nematic Susceptibility of Hole-Doped and Electron-Doped BaFe2As2 Iron-Based Superconductors from Shear Modulus Measurements

Autor(en)
A. E. Böhmer, P. Burger, F. Hardy, T. Wolf, P. Schweiss, R. Fromknecht, M. Reinecker, W. Schranz, C. Meingast
Abstrakt

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(en)
Physik Funktioneller Materialien
Externe Organisation(en)
Karlsruher Institut für Technologie
Journal
Physical Review Letters
Band
112
Anzahl der Seiten
5
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.112.047001
Publikationsdatum
01-2014
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik
Schlagwörter
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/c5fad9f0-5f1d-4317-86c2-e4334c12eb02