28 / 168
Abstracts
P1.12
The dynamics of HD adsorbed on MCM-41: NMR studies
Huan Chao, Hamida Jaha, Sullivan Neil
Department of Physics, University of Florida, Gainesville, FL, USA
Nuclear spin-spin and nuclear spin-lattice relaxation times of a monolayer of
HD molecules adsorbed on MCM-41 were measured with pulsed NMR in the
temperature range of 1
.
5
< T <
20
K
. We observed two distinctly different
thermally activated processes of the HD molecule motions in the MCM-41 sample.
For 5
< T <
8
.
8
K
, the molecule motions are characterized by a slow diffusion
process, which is followed by a fast diffusion process for 8
.
9
< T <
12
K
. The
molecule motion is dominated by liquid-like behavior above 12 K. The NMR
results are discussed with a simple model that describes cluster motion at low
temperature and single molecule motion at high temperature.
P1.13
Quasiclassical Approach to a SODW state in URu
2
Si
2
Priya Sharma
Department of Physics, Indian Institute of Science, Bangalore - 560012, India.
A quasiclassical approach is employed to theoretically investigate a new state
based on spin orbit density wave (SODW) order suggested as a potential
mechanism for the hidden-order phase in the heavy fermion compound URu
2
Si
2
by
T. Das [1]. A formalism is set up using a Hamiltonian including spin-orbit coupling
and a Fermi surface nesting condition postulated in the latter. Preliminary results
show the gapped structure of the density of states induced by the SOC and
FS topology even in the absence of off-diagonal interactions. This quasiclassical
machinery can be used to derive spin-dependent transport in the SODW state in
this system.
[1] T. Das,
Phys. Rev. B
89
, 045135(2014).
28