Baza Publikacji Pracowników Politechniki Lubelskiej

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
Impact Factor:	1,079
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.

Magnetic field induced rotation of the d-vector in Sr2RuO4