Order-parameter symmetries, phase diagrams, and physical properties of two-dimensional unconventional superconductors. II. p-wave-pairing superconductivity

Yu. M. Gufan; G. M. Vereshkov; P. Tolédano; B. Mettout; R. Bouzerar; V. Lorman

doi:10.1103/PhysRevB.51.9228

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Order-parameter symmetries, phase diagrams, and physical properties of two-dimensional unconventional superconductors. II. p-wave-pairing superconductivity

Yu. M. Gufan, G. M. Vereshkov, P. Tolédano, B. Mettout, R. Bouzerar, V. Lorman

DOI 10.1103/PhysRevB.51.9228 · Physical Review B

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Abstract

The phenomenological properties of two-dimensional p-pairing-wave superconductors are worked out in the framework of a generalized Landau theory using nontruncated order-parameter expansions. The full set of stable superconducting states arising from a normal state of symmetry ∞m, 4mm, and mm2 are found. Their theoretical phase diagrams are constructed, and the physical properties of the stable states are discussed. The p-wave states are shown to be distinguishable by the structural and magnetic properties of the condensate and by the structure of their gap functions. They can be differentiated from d-pairing-wave states when the spin-orbit interaction is neglected. When spin-orbit coupling is taken into account p-pairing waves are mixed with s, d, f, g, . . . pairing waves. In this respect, the experimental results found in the oxide superconductors appear as compatible either with a mixed state or with a pure d- or p-pairing state in the absence of spin-orbit interaction.