Topological d-wave superconductor
V. I. Belyavsky, V. V. Kapaev, Yu. V. Kopaev
Lebedev Physical Institute of the RAS, 119991 Moscow, Russia
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.