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Title: Inelastic neutron scattering study of a nonmagnetic collapsed tetragonal phase of CaFe2As2: Evidence of the impact of spin fluctuations on superconductivity in the iron-arsenide compounds.

Abstract

The relationship between antiferromagnetic spin fluctuations and superconductivity has become a central topic of research in studies of superconductivity in the iron pnictides. We present unambiguous evidence of the absence of magnetic fluctuations in the non-superconducting collapsed tetragonal phase of CaFe2As2 via inelas- tic neutron scattering time-of-flight data, which is consistent with the view that spin fluctuations are a necessary ingredient for unconventional superconductivity in the iron pnictides. We demonstrate that the collapsed tetrag- onal phase of CaFe2As2 is non-magnetic, and discuss this result in light of recent reports of high-temperature superconductivity in the collapsed tetragonal phase of closely related compounds.

Authors:
 [1];  [2];  [1];  [1];  [1];  [2];  [2];  [3];  [2];  [3];  [2]
  1. ORNL
  2. Ames Laboratory and Iowa State University
  3. Ames Laboratory
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1110956
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 22; Journal ID: ISSN 0031--9007
Country of Publication:
United States
Language:
English

Citation Formats

Soh, Jing Han, Tucker, G. S., Pratt, Daniel K, Abernathy, Douglas L, Stone, Matthew B, Ran, S., Budko, S L, Canfield, P. C., Kreyssig, A., McQueeney, R. J., and Goldman, A. I. Inelastic neutron scattering study of a nonmagnetic collapsed tetragonal phase of CaFe2As2: Evidence of the impact of spin fluctuations on superconductivity in the iron-arsenide compounds.. United States: N. p., 2013. Web. doi:10.1103/PhysRevLett.111.227002.
Soh, Jing Han, Tucker, G. S., Pratt, Daniel K, Abernathy, Douglas L, Stone, Matthew B, Ran, S., Budko, S L, Canfield, P. C., Kreyssig, A., McQueeney, R. J., & Goldman, A. I. Inelastic neutron scattering study of a nonmagnetic collapsed tetragonal phase of CaFe2As2: Evidence of the impact of spin fluctuations on superconductivity in the iron-arsenide compounds.. United States. https://doi.org/10.1103/PhysRevLett.111.227002
Soh, Jing Han, Tucker, G. S., Pratt, Daniel K, Abernathy, Douglas L, Stone, Matthew B, Ran, S., Budko, S L, Canfield, P. C., Kreyssig, A., McQueeney, R. J., and Goldman, A. I. 2013. "Inelastic neutron scattering study of a nonmagnetic collapsed tetragonal phase of CaFe2As2: Evidence of the impact of spin fluctuations on superconductivity in the iron-arsenide compounds.". United States. https://doi.org/10.1103/PhysRevLett.111.227002.
@article{osti_1110956,
title = {Inelastic neutron scattering study of a nonmagnetic collapsed tetragonal phase of CaFe2As2: Evidence of the impact of spin fluctuations on superconductivity in the iron-arsenide compounds.},
author = {Soh, Jing Han and Tucker, G. S. and Pratt, Daniel K and Abernathy, Douglas L and Stone, Matthew B and Ran, S. and Budko, S L and Canfield, P. C. and Kreyssig, A. and McQueeney, R. J. and Goldman, A. I.},
abstractNote = {The relationship between antiferromagnetic spin fluctuations and superconductivity has become a central topic of research in studies of superconductivity in the iron pnictides. We present unambiguous evidence of the absence of magnetic fluctuations in the non-superconducting collapsed tetragonal phase of CaFe2As2 via inelas- tic neutron scattering time-of-flight data, which is consistent with the view that spin fluctuations are a necessary ingredient for unconventional superconductivity in the iron pnictides. We demonstrate that the collapsed tetrag- onal phase of CaFe2As2 is non-magnetic, and discuss this result in light of recent reports of high-temperature superconductivity in the collapsed tetragonal phase of closely related compounds.},
doi = {10.1103/PhysRevLett.111.227002},
url = {https://www.osti.gov/biblio/1110956}, journal = {Physical Review Letters},
issn = {0031--9007},
number = 22,
volume = 111,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2013},
month = {Tue Jan 01 00:00:00 EST 2013}
}