Magnetic field induced rotation of the d-vector in Sr2RuO4
Artykuł w czasopiśmie
| Status: | |
| Autorzy: | Annett James F., Litak Grzegorz, Györffy Balazs L., Wysokiński Karol Izydor |
| Rok wydania: | 2007 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 2 |
| Wolumen/Tom: | 460-462 |
| Strony: | 995 - 996 |
| Web of Science® Times Cited: | 6 |
| Scopus® Cytowania: | 6 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The superconductor Sr 2 RuO 4 is widely believed to be a spin triplet system with a chiral order parameter analogous to the A phase of superfluid helium-3. The best evidence for this pairing state is that the Knight shift or spin susceptibility measured in neutron scattering is constant below T c , unlike in a spin-singlet superconductor. The original Knight shift and neutron scattering measurements were performed for magnetic fields aligned in the ruthenate a–b plane. These would be consistent with a triplet d-vector d(k) aligned along the c-axis. However, recently the Knight shift for fields along c-axis was also found to be constant below T c , which is not expected for this symmetry state. In this paper, we show that while spin–orbit interaction stabilises the c-axis oriented d-vector, it is possible that only a very small external B field may be sufficient to rotate the d-vector into the a–b plane. In this case, the triplet pairing model remains valid. We discuss characteristics of the transition and the prospects to detect it in thermodynamic quantities. |
