Authors: U Chatterjee; J Zhao; M Iavarone; R Di Capua; J P Castellan; G Karapetrov; C D Malliakas; M G Kanatzidis; H Claus; J P C Ruff; F Weber; J van Wezel; J C Campuzano; R Osborn; M Randeria; N Trivedi; M R Norman; S Rosenkranz Journal: Nat Commun Date: 2015-02-17 Impact factor: 14.919