Electromagnetic response of a k(x)+/- ik(y) superconductor: Effect of order-parameter collective modes

Article

关键词: T-VIOLATING SUPERCONDUCTORS;    LAYERED PEROVSKITE;    SPIN FLUCTUATIONS;    SR2RUO4;    STATE;   

DOI  :  10.1103/PhysRevB.62.3042

来源: SCIE

【 摘 要 】

Effects of order parameter collective modes on electromagnetic response are studied for a clean spin-triplet superconductor with k(x)+/-ik(y) orbital symmetry, which has been proposed as a candidate pairing symmetry for Sr2RuO4. It is shown that the k(x)+/-ik(y) superconductor has characteristic massive collective modes analogous to the clapping mode in the A phase of superfluid He-3. We discuss the contribution from the collective modes to ultrasound attenuation and electromagnetic absorption. We show that in the electromagnetic absorption spectrum the clapping mode gives rise to a resonance peak well below the pair breaking frequency, while the ultrasound attenuation is hardly influenced by the collective excitations.

【 授权许可】

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