Magnetic field induced rotation of the d-vector in the spin-triplet superconductor Sr2RuO4
James F. Annett, B. L. Györffy, G. Litak, K. I. Wysokiński
DOI 10.1103/PhysRevB.78.054511 · Physical Review B
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Abstract
In zero magnetic field the superconductor Sr2RuO4 is believed to have a chiral spin-triplet pairing state in which the gap function d-vector is aligned along the crystal c axis. Using a phenomenological but orbital specific description of the spin-dependent electron-electron attraction and a realistic quantitative account of the electronic structure in the normal state, we analyze the orientation of the spin-triplet Cooper pair d-vector in response to an external c-axis magnetic field. We show that, for suitable values of the model parameters, a c-axis field of only 20 mT is able to cause a reorientation phase transition of the d-vector from along c to the a plane, in agreement with recent experiments.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
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