Investigation of half-quantum vortex in superfluid 3He-A phase

27th International Conference on Low Temperature Physics

Kimura, Y.^1,2 ; Kunimatsu, T.^1 ; Obara, K.^1 ; Yano, H.^1 ; Hata, T.^1 ; Takagi, T.^3 ; Ishikawa, O.^1

Graduate School of Science, Osaka City University, Osaka

558-8585, Japan^1

Institute for Solid State Physics, University of Tokyo, Chiba

277-8581, Japan^2

Department of Applied Physics, Fukui University, Fukui

910-8507, Japan^3

关键词: Magnet systems;    NMR techniques;    Order parameter;    Parallel plates;    Quantum vortex;    Sample cell;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/1/012006/pdf
DOI  :  10.1088/1742-6596/568/1/012006

来源: IOP

【 摘 要 】

In superfluid3He-A, it was theoretically predicted that the half-quantum vortex (HQV) is stable where the order parameters and are perpendicular to each other in the order parameter configuration. However, the existence of the HQV has not been reported experimentally. Now we are trying to detect the HQV in superfluid3He-A confined in the parallel-plates sample cell with 12 μm gap, where and are perpendicular to each other, by using a NMR technique under a rotation at ISSP. In order to detect the HQV, we improved the magnet system for NMR so far, but we have not observed the HQV yet. We report here the experimental details and some results for investigating the HQV.