QFS 2016 Book of Abstracts

Abstracts

P1.2 Development of Experiment for Direct Observation of Majorana Cone at Surface of Superfluid Helium Three B Phase Satoshi Murakawa and Kensuke Yoshida Cryogenic Research Center, The University of Tokyo Recently, the surface states of superfluid 3 He are very attractive topics in the contexts of “topological superfluids”. In the scheme of topological superfluids, there is a gapless cone-like surface state in the bulk gap of a surface density of states (SDOS). We call such surface state Majorana cone. Recent transverse acoustic impedance measurements of superfluid 3 He B-phase revealed the SDOS. However, those measurements only suggested a shape of the total SDOS that is calculated by integration of all incident angle. In this work, we plan to detect Majorana cone directly by quantum Andreev reflection which should depend on the energy of SDOS at an angle of incident. Klochkov Alex(1), Alakshin Egor(1), Gazizulin Rasul(1), Kuzmin Vyacheslav(1), Safiullin Kajum(1), Tagirov Murat (1,2), Yudin Alexey(3), Zakharov Mikhail(1) 1) Kazan Federal University, Institute of Physics, 420008, Kremlevskaya 18, Kazan, Russia 2) Institute of Perspective Research, TAS, 420111, L. Bulachnaya 36a Kazan, Russia 3) Kapitza Institute, 119334, 2 ul. Kosygina, Moscow, Russia Nuclear magnetic resonance (NMR) of 3 He is a developing method of obtaining information about structure and properties of the porous substrates. The NMR characteristics of normal liquid 3 He at temperatures above the Fermi degeneracy of this quantum liquid strongly depend on size of pore and magnetic properties of pore’s surface where 3 He is located. The main reason for that is highly effective spin diffusion, which transfers the “magnetic state” of adsorbed 3 He nuclei to the liquid ones and so-called “fast exchange” process of interchange between adsorbed and liquid state 3 He nuclei. A summary on spin kinetics data of 3 He in various nano-porous media at temperatures 1.5 – 4.2K is reported. P1.3 Porous media research by 3 He NMR techniques

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