Field-induced dx2−y2+idxy state and marginal stability of high-Tc superconductors
A. V. Balatsky
DOI 10.1103/PhysRevB.61.6940 · Physical Review B
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Abstract
It is shown that the complex dxy component is generated in a d-wave superconductor in the magnetic field. As one enters a superconducting state at the finite field the normal to superconducting transition occurs into the bulk dx2−y2+idxy state. The driving force for the transition is the linear coupling between the magnetic field and the nonzero magnetization of the dx2−y2+idxy condensate. The external magnetic field violates parity and time-reversal symmetries and the nodal quasiparticle states respond by generating the idxy component of the order parameter, with the magnitude estimated to be on the order of a few kelvin. Parity (P) and time-reversal (T) symmetries are violated in this state.
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