Evidence of nematic order and nodal superconducting gap along [110] direction in RbFe2As2
Evidence of nematic order and nodal superconducting gap along [110] direction in RbFe2As2
Abstract Unconventional superconductivity often intertwines with various forms of order, such as the nematic order which breaks the rotational symmetry of the lattice. Here we report a scanning tunneling microscopy study on RbFe 2 As 2 , a heavily hole-doped Fe-based superconductor (FeSC). We observe significant symmetry breaking in its …