Underlying SU(2) gauge structure and hidden staggered flux state in the lightly doped spin liquid Original Research Article

We discuss signature of the staggered flux (SF) state which enters the low-energy spectrum in the d-wave superconducting state in the lightly doped spin liquid states, based on the SU(2) lattice gauge theory formulation of the t–J model and an appropriate gauge transformation. The staggered orbital current correlation and a possible experimental way to detect signature of the hidden SF state are discussed.