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Title: Inelastic neutron scattering study on the resonance mode in an optimally doped superconductor LaFeAsO0.92F0.08

Abstract

An optimally doped iron-based superconductor LaFeAsO{sub 0.92}F{sub 0.08} with T{sub c} = 29 K has been studied by inelastic powder neutron scattering. The magnetic excitation at Q = 1.15 {angstrom}{sup -1} is enhanced below T{sub c}, leading to a peak at E{sub res}-13 meV as the resonance mode, in addition to the formation of a gap at low energy below the crossover energy {Delta}{sub c}-10 meV. The peak energy at Q = 1.15 {angstrom}{sup -1} corresponds to 5.2 k{sub B}T{sub c} in good agreement with the other values of resonance mode observed in iron based superconductors. Although the phonon density of states has a peak at the same energy as the resonance mode in the present superconductor, The Q dependence is consistent with the resonance being of preominantly magnetic origin.

Authors:
 [1];  [2];  [3];  [3];  [1];  [4];  [5];  [1]
  1. Japan Atomic Energy Agency (JAEA)
  2. JAEA and JST-TRIP, Tokyo
  3. ORNL
  4. Japan Synchrotron Radiation Research Institute, SPring-8
  5. JST-TRIP and NIAIST, Japan
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1006453
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 82; Journal Issue: 17; Journal ID: ISSN 1098--0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ARSENIC OXIDES; EXCITATION; FLUORINE ADDITIONS; INELASTIC SCATTERING; IRON OXIDES; LANTHANUM OXIDES; NEUTRON DIFFRACTION; RESONANCE; SUPERCONDUCTORS; DOPED MATERIALS

Citation Formats

Shamoto, S, Ishikado, Motoyuki, Christianson, Andrew D, Lumsden, Mark D, Wakimoto, S, Kodama, K., Iyo, Akira, and Arai, Masatoshi. Inelastic neutron scattering study on the resonance mode in an optimally doped superconductor LaFeAsO0.92F0.08. United States: N. p., 2010. Web. doi:10.1103/PhysRevB.82.172508.
Shamoto, S, Ishikado, Motoyuki, Christianson, Andrew D, Lumsden, Mark D, Wakimoto, S, Kodama, K., Iyo, Akira, & Arai, Masatoshi. Inelastic neutron scattering study on the resonance mode in an optimally doped superconductor LaFeAsO0.92F0.08. United States. https://doi.org/10.1103/PhysRevB.82.172508
Shamoto, S, Ishikado, Motoyuki, Christianson, Andrew D, Lumsden, Mark D, Wakimoto, S, Kodama, K., Iyo, Akira, and Arai, Masatoshi. 2010. "Inelastic neutron scattering study on the resonance mode in an optimally doped superconductor LaFeAsO0.92F0.08". United States. https://doi.org/10.1103/PhysRevB.82.172508.
@article{osti_1006453,
title = {Inelastic neutron scattering study on the resonance mode in an optimally doped superconductor LaFeAsO0.92F0.08},
author = {Shamoto, S and Ishikado, Motoyuki and Christianson, Andrew D and Lumsden, Mark D and Wakimoto, S and Kodama, K. and Iyo, Akira and Arai, Masatoshi},
abstractNote = {An optimally doped iron-based superconductor LaFeAsO{sub 0.92}F{sub 0.08} with T{sub c} = 29 K has been studied by inelastic powder neutron scattering. The magnetic excitation at Q = 1.15 {angstrom}{sup -1} is enhanced below T{sub c}, leading to a peak at E{sub res}-13 meV as the resonance mode, in addition to the formation of a gap at low energy below the crossover energy {Delta}{sub c}-10 meV. The peak energy at Q = 1.15 {angstrom}{sup -1} corresponds to 5.2 k{sub B}T{sub c} in good agreement with the other values of resonance mode observed in iron based superconductors. Although the phonon density of states has a peak at the same energy as the resonance mode in the present superconductor, The Q dependence is consistent with the resonance being of preominantly magnetic origin.},
doi = {10.1103/PhysRevB.82.172508},
url = {https://www.osti.gov/biblio/1006453}, journal = {Physical Review B},
issn = {1098--0121},
number = 17,
volume = 82,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}