Dr. Suk Bum Chung
Stanford University

Inter-orbital collective modes in the quasi-1D model of SRO superconductor

In the quasi-1D model of the chiral superconductivity in Sr₂RuO₄ the Cooper pair states in the two 1D orbital are not strongly locked to each other, which gives rise to two different classes of collective modes. One is the charge mode which tries to restore the time reversal symmetry. The other is the spin mode that tries to restore relative rotational symmetry of the d-vectors on each orbital. The former can be detected through NQR while the latter can be detected through ESR. Experimental detection of such modes would be strong evidences in favor of the quasi-1D model.