Evolution of Anisotropic In-plane Resistivity with doping level in Ca${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$ Single Crystals

J. Q. Ma, X. G. Luo, P. Cheng +8

We measured the in-plane resistivity anisotropy in the underdoped Ca${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$ single crystals. The anisotropy (indicated by ${\rho }_{\mathrm{b}}-{\rho }_{\mathrm{a}}$) appears below…