Holographic 12-BPS surface defects in ABJM

We study the class of AdS₃ × ℂℙ³ solutions to massive Type IIA supergravity with osp(6|2) superconformal algebra recently constructed in [1]. These solutions are foliations over an interval preserving N = (0, 6) supersymmetry in two dimensions, that in the massless limit can be mapped to the AdS₄ × ℂℙ³ solution of ABJM/ABJ. We show that in the massive case extra NS5-D8 branes, that we interpret as 12-BPS surface defect branes within the ABJ theory, backreact in the geometry and turn one of the 3d field theory directions onto an energy scale, generating a flow towards a 2d CFT. We construct explicit quiver field theories that we propose flow in the IR to the (0, 6) SCFTs dual to the solutions. Finally, we show that the AdS₃ solutions realise geometrically, in terms of large gauge transformations, an extension to the massive case of Seiberg duality in ABJ theories proposed in the literature.