5 research outputs found
Genome wide association studies (GWAS) and copy number variation (CNV) studies of the major psychoses: What have we learnt?
10.1016/j.neubiorev.2011.09.001Neuroscience and Biobehavioral Reviews361556-571NBRE
Dimensionality control of d-orbital occupation in oxide superlattices
Manipulating the orbital state in a strongly correlated electron system is of fundamental and technological
importance for exploring and developing novel electronic phases. Here, we report an unambiguous
demonstration of orbital occupancy control between t2g and eg multiplets in quasi-two-dimensional
transition metal oxide superlattices (SLs) composed of a Mott insulator LaCoO3 and a band insulator
LaAlO3. As the LaCoO3 sublayer thickness approaches its fundamental limit (i.e. one unit-cell-thick), the
electronic state of the SLs changed from a Mott insulator, in which both t2g andeg orbitals are partially filled,
to a band insulator by completely filling (emptying) the t2g (eg) orbitals. We found the reduction of
dimensionality has a profound effect on the electronic structure evolution, which is, whereas, insensitive to
the epitaxial strain. The remarkable orbital controllability shown here offers a promising pathway for novel
applications such as catalysis and photovoltaics, where the energy of d level is an essential parameter.111131sciescopu
Search for low-mass dark matter with CsI(Tl) crystal detectors
We present a search for low-mass (≤ 20 GeV=c2) weakly interacting massive particles (WIMPs), strong
candidates of dark matter particles, using the low-background CsI(Tl) detector array of the Korea Invisible
Mass Search experiment. With a total data exposure of 24,524.3 kg days, we search for WIMP interaction
signals produced by nuclei recoiling from WIMP-nuclear elastic scattering with visible energies between
2 and 4 keVee (electron-equivalent energy). The observed energy distribution of candidate events is
consistent with null signals, and upper limits of the WIMP-proton spin-independent interaction are set with
a 90% confidence level. The observed limit covers most of the low-mass region of parameter space favored
by the DAMA annual modulation signal assuming the standard halo model.118161Nscopu