title: NMR signature of one-dimensional behavior of 3He in nanopores.
abstract: We have performed thermodynamic and NMR relaxation time measurements of 3He adsorbed in the pores of the mesoporous molecular sieve MCM-41 at temperatures down to 1.7 K and at a range of frequencies up to 240 kHz. The MCM-41 substrate comprises a uniform array of quasi-1D straight pores with a diameter of 2.3 nm. We preplated the pores with a monolayer of 4He to achieve an effective diameter of 1.6 nm at low temperatures. We made NMR measurements as a function of line density and frequency to investigate the spin dynamics and the effect of dimensionality. We observed T(1) is proportional to ω1/2, which is characteristic of one-dimensional diffusion. At these temperatures this arises from a classical size effect in the narrow pores. Our results demonstrate the possibility to study the spin dynamics of a 1D Tomonaga-Luttinger liquid at lower temperatures, where the 3He liquid will constitute a quantum 1D system.
authors: Department of Physics, Royal Holloway University of London, Egham, Surrey TW20 0EX, United Kingdom.
authors: B
authors: B
authors: Yager
authors: J
authors: J
authors: Nyéki
authors: A
authors: A
authors: Casey
authors: B P
authors: BP
authors: Cowan
authors: C P
authors: CP
authors: Lusher
authors: J
authors: J
authors: Saunders