Friedel-like oscillations from interstitial Iron in superconducting Fe1+yTe0.62Se0.38

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • V. Thampy
  • J. Kang
  • J. A. Rodriguez-Rivera
  • A. T. Savici
  • J. Hu
  • T. J. Liu
  • B. Qian
  • D. Fobes
  • Z. Q. Mao
  • C. B. Fu
  • W. C. Chen
  • Q. Ye
  • R. W. Erwin
  • T. R. Gentile
  • Z. Tesanovic
  • C. Broholm

Detail(s)

Original languageEnglish
Article number107002
Journal / PublicationPhysical Review Letters
Volume108
Issue number10
Online published7 Mar 2012
Publication statusPublished - 9 Mar 2012
Externally publishedYes

Abstract

Using polarized and unpolarized neutron scattering, we show that interstitial Fe in superconducting Fe 1+y Te 1-x Se x induces a magnetic Friedel-like oscillation that diffracts at Q=(120) and involves >50 neighboring Fe sites. The interstitial >2μB  moment is surrounded by compensating ferromagnetic four-spin clusters that may seed double stripe ordering in Fe1+y Te. A semimetallic five-band model with (½ ½) Fermi surface nesting and fourfold symmetric superexchange between interstitial Fe and two in-plane nearest neighbors largely accounts for the observed diffraction.  

Citation Format(s)

Friedel-like oscillations from interstitial Iron in superconducting Fe1+yTe0.62Se0.38. / Thampy, V.; Kang, J.; Rodriguez-Rivera, J. A. et al.
In: Physical Review Letters, Vol. 108, No. 10, 107002, 09.03.2012.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review