Wednesday, August 15, 2012

1208.2927 (W. J. Gannon et al.)

Magnetization in the Superconducting State of UPt$_3$ from Polarized
Neutron Diffraction
   [PDF]

W. J. Gannon, W. P. Halperin, C. Rastovski, M. R. Eskildsen, Pengcheng Dai, A. Stunault
The heavy fermion superconductor UPt$_3$ is thought to have odd-parity, a state for which the temperature dependence of the spin susceptibility is an important signature. In order to address conflicting reports from two different experiments, the NMR Knight shift and measurements of the anisotropy of the upper critical field, we have measured the bulk susceptibility in a high quality single crystal using polarized-neutron diffraction. A temperature independent susceptibility was observed for $H||a$ through the transitions between the normal state and the superconducting A-, B- and C-phases, consistent with odd-parity, spin-triplet superconductivity.
View original: http://arxiv.org/abs/1208.2927

No comments:

Post a Comment