English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Intrinsic Charge Dynamics in High-Tc AFeAs(O,F) Superconductors

MPS-Authors
/persons/resource/persons280484

Schmidt,  M.
Research Group Organic Electronics (Hagen Klauk), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons133799

Keimer,  B.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons279802

Boris,  A.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Charnukha, A., Pröpper, D., Zhigadlo, N., Naito, M., Schmidt, M., Wang, Z., et al. (2018). Intrinsic Charge Dynamics in High-Tc AFeAs(O,F) Superconductors. Physical Review Letters, 120(8): 087001.


Cite as: https://hdl.handle.net/21.11116/0000-000E-D1D4-6
Abstract
We report the first determination of the in-plane complex optical conductivity of 1111 high-T-c superconducting iron oxypnictide single crystals PrFeAs(O,F) and thin films SmFeAs(O,F) by means of conventional and microfocused infrared spectroscopy, ellipsometry, and time-domain THz transmission spectroscopy. A strong itinerant contribution is found to exhibit a dramatic difference in coherence between the crystal and the film. Using extensive temperature-dependent measurements of THz transmission, we identify a previously undetected 2.5-meV collective mode in the optical conductivity of SmFeAs(O,F), which is strongly suppressed at T-c and experiences an anomalous T-linear softening and narrowing below T* approximate to 110 K >> T-c. The suppression of the infrared absorption in the superconducting state reveals a large optical superconducting gap with a similar gap ratio 2 Delta/k(B)T(c) approximate to 7 in both materials, indicating strong pairing.