We have measured the heat capacity of 3He adsorbed on one-dimensional (1D) nanopores of FSM-16 with different pore-diameters. Dilute 3He atoms on more than one layers of 4He preplated nanotunnels with 22 Å in diameter show a Schottky type peak around 0.25 K, which is similar to our recent report for 28 Å nanotunnels. This behavior of heat capacity is explained as the crossover from 1D to 2D motion of Fermi gas in a confined geometry. The pore-size effect on the temperature and magnitude of the peak is quantitatively reproduced by a simple calculation for non-interacting Fermi gas in the adsorption potential from the substrate.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics