NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Friedel-like Oscillations from Interstitial Iron in Superconducting Fe1+yTe0.62Se0.38
Published
Author(s)
V. Thampy, J. Kang, Jose Rodriguez Rivera, W. Bao, A. T. Savici, J. Hu, T. J. Liu, B. Qian, D. Fobes, Z. Q. Mao, C. B. Fu, Wangchun Chen, Q. Ye, Ross Erwin, Thomas R. Gentile, Z. Tesanovic, Collin L. Broholm
Abstract
Using polarized and unpolarized neutron scattering we show that interstital Fe in superconducting Fe1=yTe1-xSex induces a magnetic Friedel-like oscillation that idffracts at Q = (1⁄20) and involves greater than}50 neighboring Fe sites. The interstitial greater than} 2 υ} moment is surrounded by compensating ferromagnetic four spin clusters that may seed double stripe ordering in Fe^d1+yTe. A semi-metallic 5-band model with (1⁄21⁄2 Fermi surface nesting and four fold symmetric super-exchange between interstitial Fe and two in-plane nearest neighbors largely accounts for the observed diffraction.
Thampy, V.
, Kang, J.
, Rodriguez Rivera, J.
, Bao, W.
, Savici, A.
, Hu, J.
, Liu, T.
, Qian, B.
, Fobes, D.
, Mao, Z.
, Fu, C.
, Chen, W.
, Ye, Q.
, Erwin, R.
, Gentile, T.
, Tesanovic, Z.
and Broholm, C.
(2012),
Friedel-like Oscillations from Interstitial Iron in Superconducting Fe<sub>1+y</sub>Te<sub>0.62</sub>Se<sub>0.38</sub>, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909786
(Accessed October 10, 2025)