Interstitial iron tuning of the spin fluctuations in the nonsuperconducting parent phase Fe1+xTe

Stock, C., Rodriguez, E.E., Green, M.A., Zavalij, P., Rodriguez-Rivera, J.A. (2011) Interstitial iron tuning of the spin fluctuations in the nonsuperconducting parent phase Fe1+xTe. Physical Review B - Condensed Matter and Materials Physics, 84 (4). p. 45124. ISSN 1098-0121. (doi:10.1103/PhysRevB.84.045124) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1103/PhysRevB.84.045124

Abstract

Using neutron inelastic scattering, we investigate the low-energy spin fluctuations in Fe1+xTe as a function of both temperature and interstitial iron concentration. For Fe1.057(7)Te, the magnetic structure is defined by a commensurate wave vector of (12,0,12). The spin fluctuations are gapped with a sharp onset at 7 meV and are three dimensional in momentum transfer, becoming two dimensional at higher-energy transfers. On doping with interstitial iron, we find, in Fe1.141(5)Te, the ordering wave vector is located at the (0.38,0,12) position and the fluctuations are gapless with the intensity peaked at an energy transfer of 4 meV. These results show that the spin fluctuations in the Fe1+xTe system can be tuned not only through selenium doping, but also with interstitial iron. We also compare these results with superconducting concentrations and, in particular, the resonance mode in the Fe1+xTe1-ySey system. © 2011 American Physical Society.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevB.84.045124
Additional information: Unmapped bibliographic data: C7 - 045124 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Phys. Rev. B Condens. Matter Mater. Phys. [Field not mapped to EPrints] AD - NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20889, United States [Field not mapped to EPrints] AD - Indiana University Cyclotron Facility, 2401 Milo B. Sampson Lane, Bloomington, IN 47404, United States [Field not mapped to EPrints] AD - Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States [Field not mapped to EPrints] AD - Department of Chemistry, University of Maryland, College Park, MD 20742, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 14 Oct 2015 11:04 UTC
Last Modified: 29 May 2019 16:08 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50976 (The current URI for this page, for reference purposes)
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