Anisotropic vortex lattice structures in the FeSe superconductor
Anisotropic vortex lattice structures in the FeSe superconductor
In the recent work by Song et al. [Science 332, 1410 (2011)], the scanning tunneling spectroscopy experiment in the stoichiometric FeSe revealed evidence for nodal superconductivity and strong anisotropy. The nodal structure can be explained with the extended $s$-wave pairing structure with the mixture of the ${s}_{{x}^{2}+{y}^{2}}$ and ${s}_{{x}^{2}{y}^{2}}$ pairing …