Symmetry of the order parameter in superconducting ZrZn_2

Abstract

We apply symmetry considerations to study the possible superconducting order parameters in ferromagnetic ZrZn_2. We predict that the presence and the location of the superconducting gap nodes depend on the direction of magnetization M. In particular, if M is directed along the z axis, then the order parameter should always have zeros. We also discuss how to determine the gap symmetry in ZrZn_2 using ultrasound attenuation measurements.

6 pages, submitted to PRB; some corrections and discussion added

References in corpus (5)

• Ultrasound Attenuation in Sr${}_2$RuO${}_4$: an Angle-Resolved Study of the Superconducting Gap Function
• Strong Enhancement of Superconducting T_c in Ferromagnetic Phases
• A Model for Superconductivity in Ferromagnetic ZrZn2
• Longitudinal spin-fluctuations and superconductivity in ferromagnetic ZrZn${}_2$ from ab initio calculations
• Electron-Phonon Interaction and Ultrasonic Attenuation in the Ruthenate and Cuprate superconductors

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• Phenomenological theory of superconductivity near domain walls in ferromagnets
• Interplay between magnetism and superconductivity in URhGe
• Possible symmetries of the superconducting order parameter in a hexagonal ferromagnet
• The Pairing Symmetry in the Ferromagnetic Superconductor $UG{e}_2$
• Density of states near a vortex core in ferromagnetic superconductors: Application to STM measurements