Possibility of Horizontal Line Node in KFe${}_2$As${}_2$ Probed by Muon Spin Rotation

Kazuki Ohishi, Yasuyuki Ishii, Hedeto Fukazawa +10

The anisotropy and temperature dependence of the magnetic field penetration depth in the iron-based superconductor KFe${}_2$As${}_2$ have been measured down to 20 mK by means of muon s…