UCL  IRIS
Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data grouped in the sections named "Externally Awarded" or "Internally Disbursed" (shown on the profile page) to your Research Finance Administrator. Your can find your Research Finance Administrator at http://www.ucl.ac.uk/finance/research/post_award/post_award_contacts.php by entering your department
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
Inelastic x-ray scattering study of superconducting SmFeAsO1-xFy single crystals: Evidence for strong momentum-dependent doping-induced renormalizations of optical phonons
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Le Tacon M, Forrest TR, Ruegg C, Bosak A, Walters AC, Mittal R, Ronnow HM, Zhigadlo ND, Katrych S, Karpinski J, Hill JP, Krisch M, McMorrow DF
  • Publisher:
    AMER PHYSICAL SOC
  • Publication date:
    12/2009
  • Journal:
    PHYS REV B
  • Volume:
    80
  • Issue:
    22
  • Article number:
    220504
  • Print ISSN:
    1098-0121
  • Language:
    EN
  • Keywords:
    doping, fluorine, iron compounds, lattice dynamics, phonon dispersion relations, samarium compounds, superconducting materials, X-ray scattering, IRON, COMPOUND
  • Addresses:
    Le Tacon, M
    European Synchrotron Radiat Facil
    F-38043
    Grenoble
    France

    UCL
    Dept Phys & Astron
    London
    WC1E 6BT
    England
Abstract
We report inelastic x-ray scattering experiments on the lattice dynamics in SmFeAsO and superconducting SmFeAsO0.60F0.35 single crystals. Particular attention was paid to the dispersions along the [100] direction of three optical modes close to 23 meV, polarized out of the FeAs planes. Remarkably, two of these modes are strongly renormalized upon fluorine doping. These results provide significant insight into the energy and momentum dependence of the coupling of the lattice to the electron system and underline the importance of spin-phonon coupling in the superconducting iron pnictides.
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
UCL Researchers
Author
London Centre for Nanotechnology
Author
London Centre for Nanotechnology
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by