Discontinuous transition to a superconducting phase
Takumi Sato, Shingo Kobayashi, Yasuhiro Asano
DOI 10.1103/PhysRevB.110.144503 · Physical Review B
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Abstract
We discuss the instability of uniform superconducting states in j=3/2 superconductors that contain the pairing correlations belonging to the odd-frequency symmetry class. The instability originates from the paramagnetic response of odd-frequency Cooper pairs and is considerable at finite temperatures. As a result, the pair potential varies discontinuously at the transition temperature when the amplitude of the odd-frequency pairing correlation functions is sufficiently large. We also discuss the discontinuous transition in other uniform superconductors.
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