skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Phonons of Fe-based superconductor Ca10Pt4As8(Fe1-xPtxAs)10

Journal Article · · Journal of Physics. Condensed Matter
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [6];  [6];  [1]
  1. Comprehensive Research Organization for Science and Society (CROSS), Tokai (Japan). Research Center for Neutron Science and Technology
  2. Nagoya Univ. (Japan). Dept. of Physics
  3. J-PARC Center, Tokai (Japan). Materials and Life Science Division (MLF)
  4. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France). CEA-CNRS. Lab. Leon Brillouin
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  6. Japan Atomic Energy Agency, Kashiwa (Japan). Center for Computational Science and e-Systems (CCSE)
+ Show Author Affiliations

In this paper, we report the results of inelastic neutron scattering measurements on particular phonons of a superconducting (SC) Ca10Pt4As8(Fe1-xPtxAs)10 with the onset transition temperature Tc ~ 33 K to investigate mainly what roles orbital fluctuation plays in Cooper pairing, where we observed a slight softening of the in-plane transverse acoustic mode corresponding to the elastic constant C66. This softening starts at temperature T well above the superconducting Tc, as T decreases. An anomalously strong change of the scattering intensity of in-plane optical modes was observed at the M point of the pseudo tetragonal reciprocal space in the range of 35 < ω < 40 meV with decreasing T from far above Tc. Finally, because this ω region mainly corresponds to the motion of Fe and As atoms in the FeAs planes, the finding presents information on the coupling between the orbital fluctuation of Fe 3d electrons and the lattice system, useful for studying the possible roles of orbital fluctuation in the pairing mechanism and/or the appearance of the so-called nematic phase.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Comprehensive Research Organization for Science and Society (CROSS), Tokai (Japan); Nagoya Univ. (Japan)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Japan Society for the Promotion of Science and Technology (Japan); US-Japan Cooperative Program on Neutron Scattering Research
Contributing Organization:
J-PARC Center, Tokai (Japan); Alternative Energies and Atomic Energy Commission (CEA), Saclay (France); Japan Atomic Energy Agency, Kashiwa (Japan)
Grant/Contract Number:
AC05-00OR22725; 10604
OSTI ID:
1287020
Journal Information:
Journal of Physics. Condensed Matter, Vol. 27, Issue 46; ISSN 0953-8984
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Similar Records

Suppression of Superconductivity and Nematic Order in Fe1–ySe1–xSx (0 ≤ x ≤ 1; y ≤ 0.1) Crystals by Anion Height Disorder
Journal Article · Wed Jul 13 00:00:00 EDT 2022 · Inorganic Chemistry · OSTI ID:1287020
+10 more
Doping-evolution of the superconducting gap in single crystals of (Ca 1-x La x ) 10 (Pt 3 As 8 )(Fe 2 As 2 ) 5 superconductor from London penetration depth measurements
Journal Article · Fri Sep 19 00:00:00 EDT 2014 · Superconductor Science and Technology · OSTI ID:1287020
+1 more
Short-Range Nematic Fluctuations in Sr1-xNaxFe2As2 Superconductors
Journal Article · Mon Mar 08 00:00:00 EST 2021 · Physical Review Letters · OSTI ID:1287020
+10 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Fe-based superconductors
superconducting symmetry
inelastic neutron scattering