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VOLUME 96 (2012) | ISSUE 11 | PAGE 809
Topological d-wave superconductor
Abstract
Hypothetical topologically nontrivial superconducting state of two-dimensional electron system is discussed in connection with the problem of high-temperature superconductivity of cuprates. Direct numerical solution of the self-consistency equation exhibits two nearly degenerate order parameters which can be formally referred to dx2-y2 and dxy orbital symmetry. Spontaneous breaking of the time-reversal symmetry can mix these states and form fully gapped chiral d+id superconducting state.