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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.
P1.3
Porous media research by
3
He NMR techniques
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.
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