| Author(s): |
V. Thampy; J. Kang; Jose A. Rodriguez; 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 W. Erwin; Thomas R. Gentile; Z. Tesanovic; Collin L. Broholm; |
| Title: |
Friedel-like Oscillations from Interstitial Iron in Superconducting Fe1+yTe0.62Se0.38 |
| Published: |
March 07, 2012 |
| 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. |
| Citation: |
Physical Review Letters |
| Volume: |
108 |
| Issue: |
10 |
| Pages: |
pp. 107002-1 - 107002-5 |
| Keywords: |
superconductor;pnictide;Friedel-oscillation;interstitial-iron |
| Research Areas: |
Condensed Matter Physics |
| PDF version: |
 Click here to retrieve PDF version of paper (531KB) |
