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

Title: Neutron scattering of iron-based superconductors

Abstract

Low-energy spin excitations have been studied on polycrystalline LaFeAsO{sub 1-x}F{sub x} samples by inelastic neutron scattering. The Q-integrated dynamical spin susceptibility {chi}{double_prime}({omega}) of the superconducting samples is found to be comparable to that of the magnetically ordered parent sample. On the other hand, {chi}{double_prime}({omega}) almost vanishes at x = 0.158, where the superconducting transition temperature T{sub c} is suppressed to 7 K. In addition, {chi}{double_prime}({omega}) in optimally doped LaFeAsO{sub 0.918}F{sub 0.082} with T{sub c} = 29 K exhibits a spin resonance mode. The peak energy, E{sub res}, when scaled by k{sub B}T{sub c} is similar to the value of about 4.7 reported in other high-T{sub c} iron-based superconductors. This result suggests that there is intimate relationship between the dynamical spin susceptibility and high-T{sub c} superconductivity in iron-based superconductors, and is consistent with a nesting condition between Fermi surfaces at the {Gamma} and M points.

Authors:
 [1];  [1];  [2];  [3];  [4];  [4];  [5];  [5];  [5];  [1];  [1];  [1];  [6];  [6];  [6]
  1. Japan Atomic Energy Agency (JAEA)
  2. Japan Synchrotron Radiation Research Institute, SPring-8
  3. JAEA and JST-TRIP, Tokyo
  4. ORNL
  5. JST-TRIP and J-PARC Center
  6. 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:
1028742
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Journal of the Physical Society of Japan
Additional Journal Information:
Journal Volume: 471; Journal Issue: 21-22; Journal ID: ISSN 0921-4534
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FERMI LEVEL; NEUTRONS; RESONANCE; SCATTERING; SPIN; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TRANSITION TEMPERATURE

Citation Formats

Shamoto, S, Wakimoto, S, Kodama, K., Ishikado, Motoyuki, Christianson, Andrew D, Lumsden, Mark D, Kajimoto, Ryoichi, Nakamura, Mitsutaka, Inamura, Yasuhiro, Arai, Masatoshi, Kakurai, K., Esaka, Fumitaka, Iyo, Akira, Kito, Hijiri, and Eisaki, Hiroshi. Neutron scattering of iron-based superconductors. United States: N. p., 2011. Web. doi:10.1016/j.physc.2011.05.015.
Shamoto, S, Wakimoto, S, Kodama, K., Ishikado, Motoyuki, Christianson, Andrew D, Lumsden, Mark D, Kajimoto, Ryoichi, Nakamura, Mitsutaka, Inamura, Yasuhiro, Arai, Masatoshi, Kakurai, K., Esaka, Fumitaka, Iyo, Akira, Kito, Hijiri, & Eisaki, Hiroshi. Neutron scattering of iron-based superconductors. United States. https://doi.org/10.1016/j.physc.2011.05.015
Shamoto, S, Wakimoto, S, Kodama, K., Ishikado, Motoyuki, Christianson, Andrew D, Lumsden, Mark D, Kajimoto, Ryoichi, Nakamura, Mitsutaka, Inamura, Yasuhiro, Arai, Masatoshi, Kakurai, K., Esaka, Fumitaka, Iyo, Akira, Kito, Hijiri, and Eisaki, Hiroshi. 2011. "Neutron scattering of iron-based superconductors". United States. https://doi.org/10.1016/j.physc.2011.05.015.
@article{osti_1028742,
title = {Neutron scattering of iron-based superconductors},
author = {Shamoto, S and Wakimoto, S and Kodama, K. and Ishikado, Motoyuki and Christianson, Andrew D and Lumsden, Mark D and Kajimoto, Ryoichi and Nakamura, Mitsutaka and Inamura, Yasuhiro and Arai, Masatoshi and Kakurai, K. and Esaka, Fumitaka and Iyo, Akira and Kito, Hijiri and Eisaki, Hiroshi},
abstractNote = {Low-energy spin excitations have been studied on polycrystalline LaFeAsO{sub 1-x}F{sub x} samples by inelastic neutron scattering. The Q-integrated dynamical spin susceptibility {chi}{double_prime}({omega}) of the superconducting samples is found to be comparable to that of the magnetically ordered parent sample. On the other hand, {chi}{double_prime}({omega}) almost vanishes at x = 0.158, where the superconducting transition temperature T{sub c} is suppressed to 7 K. In addition, {chi}{double_prime}({omega}) in optimally doped LaFeAsO{sub 0.918}F{sub 0.082} with T{sub c} = 29 K exhibits a spin resonance mode. The peak energy, E{sub res}, when scaled by k{sub B}T{sub c} is similar to the value of about 4.7 reported in other high-T{sub c} iron-based superconductors. This result suggests that there is intimate relationship between the dynamical spin susceptibility and high-T{sub c} superconductivity in iron-based superconductors, and is consistent with a nesting condition between Fermi surfaces at the {Gamma} and M points.},
doi = {10.1016/j.physc.2011.05.015},
url = {https://www.osti.gov/biblio/1028742}, journal = {Journal of the Physical Society of Japan},
issn = {0921-4534},
number = 21-22,
volume = 471,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2011},
month = {Sat Jan 01 00:00:00 EST 2011}
}