期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 20, 页码 4672-4675出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.4672
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The possibility of a second pairing transition d --> d + is (d + id') in planar d-wave superconductors which occurs in the absence of external magnetic field, magnetic impurities, or boundaries is established in the framework of the nonperturbative phenomenon of dynamical chiral symmetry breaking: in the system of (2 + 1)-dimensional Dirac-like nodal quasiparticles. We determine the critical exponents and quasiparticle spectral functions that characterize the corresponding quantum-critical behavior and discuss some of its potentially observable spectral and transport features.
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