Physics and Astronomy, Ames Laboratory
Journal or Book Title
Physical Review Letters
High-resolution x-ray diffraction measurements reveal an unusually strong response of the lattice to superconductivity in Ba(Fe1−xCox)2As2. The orthorhombic distortion of the lattice is suppressed and, for Co doping near x=0.063, the orthorhombic structure evolves smoothly back to a tetragonal structure. We propose that the coupling between orthorhombicity and superconductivity is indirect and arises due to the magnetoelastic coupling, in the form of emergent nematic order, and the strong competition between magnetism and superconductivity.
American Physical Society
Nandi, S.; Kim, M. G.; Kreyssig, Andreas; Fernandes, R. M.; Pratt, D. K.; Thaler, A.; Ni, N.; Bud’ko, Sergey L.; Canfield, Paul C.; Schmalian, J.; McQueeney, Robert J.; and Goldman, Alan I., "Anomalous Suppression of the Orthorhombic Lattice Distortion in Superconducting Ba(Fe1-xCox)(2)As-2 Single Crystals" (2010). Physics and Astronomy Publications. 695.