6 citations · 9 across the 5 of their papers we have counts for
5 papers
On the Novel Superfluidity in the Second Layer of He on Graphite
Jun Usami, Hiroshi Fukuyama
Evidence for a new type of superfluid phase in second-layer He on graphite has been obtained from simultaneous measurements of torsional-oscillator response and heat-capacity o…
Growth of uniform helium submonolayers adsorbed on single-surface graphite observed by surface X-ray diffraction
Atsuki Kumashita, Hiroo Tajiri, Jun Usami +4
We observed surface X-ray diffraction from He-4 submonolayers adsorbed on a single-surface graphite using synchrotron X-rays. Time evolutions of scattering intensities along the cr…
Simulations of Surface X-ray Diffraction from a Monolayer 4He Film Adsorbed on Graphite
Atsuki Kumashita, Hiroo Tajiri, Akira Yamaguchi +7
We carried out simulations of crystal truncation rod (CTR) scatterings, i.e., one of the surface X-ray diffraction techniques with atomic resolution, from a monolayer He film adsor…
A Simple Experimental Setup for Simultaneous Superfluid-response and Heat-capacity Measurements for Helium in Confined Geometries
Jun Usami, Ryo Toda, Sachiko Nakamura +2
Torsional oscillator (TO) is an experimental technique which is widely used to investigate superfluid responses in helium systems confined in porous materials or adsorbed on substr…
Structural Study of Adsorbed Helium Films: New Approach with Synchrotron Radiation X-rays
Akira Yamaguchi, Hiroo Tajiri, Atsuki Kumashita +7
A few atomic layers of helium adsorbed on graphite have been attracting much attention as one of the ideal quantum systems in two dimension. Although previous reports on neutron di…