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PES lab. in Seoul National University (SNU) is one of the leading laboratories in Korea in the field of photoemission spectroscopy. We mainly use ultraviolet photoemission, X-ray photoemission, surface magneto-optical kerr effect as experimental tools to study the electronic and magnetic properties of condensed matters, mainly for 3d, 4d, and 4f electron systems.
X-ray absorption, magnetic circular dichroism, and resonance photoemission, which are available at synchrotron facilities such as Pohang Light Source (PLS), SPring-8 in Japan, National Synchrotron Light Source (NSLS) in USA, and Synchrotron Radiation Research Center (SRRC) in Taiwan, are also used for our research.
Using these techniques and facilities, we have studied electronic structure of extremely alpha-like Ce compounds, LaSr(MnAl)O3, Mn/Au(001) thin films and MgCNi3 among others.
Recently we have set up a pulsed laser deposition chamber in which we can make thin film sample using PLD method and transfer in situ to PES chamber to look at electronic structures.
This equipment is expected to afford an ideal situation for PES experiment because it removes sample cleaning process before the PES measurement which is very important for getting high quality data.
In addition, we installed the state-of-the-art electron energy analyzer SES-100 and polarized UV source with focusing mirrors for angle-resolved photoemission spectroscopy.
From these equipments we expect to get the state-of-the-art world-class data within a year.
Three years ago several research groups in our Department and from other major universities in Korea formed a research center named Center for Strongly Correlated Materials Research (CSMCR) and was selected as a Scientific Research Center (SRC) supported by the Korean Science and Engineering Foundation (KOSEF). This research center consists of three groups with different speciality. The main roles of these groups are crystal growth of transition metal oxides and rare-earth compounds, experimental investigation of electronic structure and optical properties, and research for the electronic structure & condensed matter theory. Our laboratory assumes a leading part in the group of experimental investigation of electronic structure. The main research fields are strongly correlated electron systems such as colossal magneto-resistance materials (CMR), heavy Fermion systems, high Tc superconducting materials, and Kondo systems. For the last three years, more than 80 papers have been published and 114 proceedings presented under the name of CSCMR and our activities will become stronger in the future. |