Sign Flips and Spin Fluctuations in Iron High-Tc Superconductors

See allHide authors and affiliations

Science  23 Apr 2010:
Vol. 328, Issue 5977, pp. 441-443
DOI: 10.1126/science.1188927

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


In superconductors, the key process that allows current to travel without resistance is the formation of electron pairs that move as a single quantum state. The mechanism of pairing in the high-temperature (high-Tc) cuprate superconductors is still elusive, so the recent discovery of iron-based superconductors (1) sparked the hope that comparison with the cuprates would lead to a better understanding of pairing in both materials. On page 474 of this issue, Hanaguri et al. (2) report the experimental determination of the pairing symmetry in FeSexTe1−x. Combined with the recent observation of a spin fluctuation resonance in this material (3) akin to that seen in the cuprates (4), a compelling hypothesis emerges that these high-Tc superconductors share a common pairing mechanism.