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

Title: Spin-Lattice Coupling and Superconductivity in Fe Pnictides

Abstract

We consider strong spin-lattice and spin-phonon coupling in iron pnictides and discuss its implications on superconductivity. Strong magneto-volume effect in iron compounds has long been known as the Invar effect. Fe pnictides also exhibit this effect, reflected in particular on the dependence of the magnetic moment on the atomic volume of Fe defined by the positions of the nearest neighbor atoms. Through the phenomenological Landau theory, developed on the basis of the calculations by the density functional theory (DFT) and the experimental results, we quantify the strength of the spin-lattice interaction as it relates to the Stoner criterion for the onset of magnetism. We suggest that the coupling between electrons and phonons through the spin channel may be sufficiently strong to be an important part of the superconductivity mechanism in Fe pnictides.

Authors:
 [1];  [2];  [3];  [3];  [4]
  1. Department of Materials Science and Engineering, Joint Institute for Neutron Sciences, University of Tennessee, Knoxville, TN 37996, USA, Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
  2. Institute for Theoretical Physics, University of Heidelberg, Heidelberg 69120, Germany
  3. Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA
  4. Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1198320
Grant/Contract Number:  
FG02-08ER46528
Resource Type:
Published Article
Journal Name:
Advances in Condensed Matter Physics
Additional Journal Information:
Journal Name: Advances in Condensed Matter Physics Journal Volume: 2010; Journal ID: ISSN 1687-8108
Publisher:
Hindawi Publishing Corporation
Country of Publication:
Egypt
Language:
English

Citation Formats

Egami, T., Fine, B. V., Parshall, D., Subedi, A., and Singh, D. J. Spin-Lattice Coupling and Superconductivity in Fe Pnictides. Egypt: N. p., 2010. Web. doi:10.1155/2010/164916.
Egami, T., Fine, B. V., Parshall, D., Subedi, A., & Singh, D. J. Spin-Lattice Coupling and Superconductivity in Fe Pnictides. Egypt. doi:10.1155/2010/164916.
Egami, T., Fine, B. V., Parshall, D., Subedi, A., and Singh, D. J. Fri . "Spin-Lattice Coupling and Superconductivity in Fe Pnictides". Egypt. doi:10.1155/2010/164916.
@article{osti_1198320,
title = {Spin-Lattice Coupling and Superconductivity in Fe Pnictides},
author = {Egami, T. and Fine, B. V. and Parshall, D. and Subedi, A. and Singh, D. J.},
abstractNote = {We consider strong spin-lattice and spin-phonon coupling in iron pnictides and discuss its implications on superconductivity. Strong magneto-volume effect in iron compounds has long been known as the Invar effect. Fe pnictides also exhibit this effect, reflected in particular on the dependence of the magnetic moment on the atomic volume of Fe defined by the positions of the nearest neighbor atoms. Through the phenomenological Landau theory, developed on the basis of the calculations by the density functional theory (DFT) and the experimental results, we quantify the strength of the spin-lattice interaction as it relates to the Stoner criterion for the onset of magnetism. We suggest that the coupling between electrons and phonons through the spin channel may be sufficiently strong to be an important part of the superconductivity mechanism in Fe pnictides.},
doi = {10.1155/2010/164916},
journal = {Advances in Condensed Matter Physics},
number = ,
volume = 2010,
place = {Egypt},
year = {2010},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1155/2010/164916

Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

Save / Share: