de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Possible unconventional superconductivity in substituted BaFe2As2 revealed by magnetic pair-breaking studies

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons126771

Mydeen,  K.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons126782

Nicklas,  M.
Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Rosa, P. F. S., Adriano, C., Garitezi, T. M., Piva, M. M., Mydeen, K., Grant, T., et al. (2014). Possible unconventional superconductivity in substituted BaFe2As2 revealed by magnetic pair-breaking studies. Scientific Reports, 4: 6252, pp. 1-6. doi:10.1038/srep06252.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0023-F1CA-F
Abstract
The possible existence of a sign-changing gap symmetry in BaFe2As2-derived superconductors (SC) has been an exciting topic of research in the last few years. To further investigate this subject we combine Electron Spin Resonance (ESR) and pressure-dependent transport measurements to investigate magnetic pair-breaking effects on BaFe1.9M0.1As2 (M = Mn, Co, Cu, and Ni) single crystals. An ESR signal, indicative of the presence of localized magnetic moments, is observed only for M = Cu and Mn compounds, which display very low SC transition temperature (T-c) and no SC, respectively. From the ESR analysis assuming the absence of bottleneck effects, the microscopic parameters are extracted to show that this reduction of T-c cannot be accounted by the Abrikosov-Gorkov pair-breaking expression for a sign-preserving gap function. Our results reveal an unconventional spin-and pressure-dependent pair-breaking effect and impose strong constraints on the pairing symmetry of these materials.