Higher-form symmetries and d-wave superconductors from doped Mott insulators
Ki-Seok Kim, Yuji Hirono
DOI 10.1103/PhysRevB.100.085142 · Physical Review B
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Abstract
One path to high-temperature cuprate superconductors is doping a Mott insulator. In this paper, we study this system from the view point of higher-form symmetries. On the introduction of slave bosons, the t−J model at a finite hole doping can be written in the form of U(1) gauge theories. After a duality transformation, they can be written as a generalized BF theory, in which the higher-form symmetries are more manifest. We identify the emergent continuous and discrete higher-form symmetries in both s-wave and d-wave superconducting phases, expected to be realized from a doped Mott insulator. The existence of a topological order is tested by examining if there is a spontaneously broken discrete one-form symmetry. We claim that a spontaneous breaking of discrete one-form symmetry may extend to a phase that has massless Dirac fermions in the limit of large number of flavors. We discuss the possibility of a topological phase transition inside the superconducting dome of high-Tc cuprates.
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