PHYSICS/BK21 SEMINAR[09..06.17]
관련링크
본문
"
“First-principles studies of novel complex
oxides heterointerfaces and energy-related”
♦Speaker : Dr. Min Sik Park (Missouri University)
♦Place : Physics Seminar Room (Science Bldg, 3-201)
♦Date & Time : June, 17(Wed) 4:00 ~ 5:00 pm
Abstract
Recently the study of novel heterointerfaces between complex oxides has been attractive because of its
peculiar physical properties at the interface which are not shown in bulk properties. In the heterointerfaces
of perovskites LaAlO3/SrTiO3 with a polarity discontinuity, the n-type metallic behavior had been measured
experimentally at the interface, contrary to insulating properties of two bulk materials. I will introduce our
previous results for the charge compensation mechanisms in the early stage of this field and also briefly
overview some of the recent issues. Furthermore, our recent study of the Fe3O4/ BaTiO3 interface, where
the effects of the charge imbalance, the strain, and the oxygen vacancies are important, will be presented.
For overcoming the energy crisis, such as the fossil fuels (oil, gas, coal) depletion and the global warming
by CO2, today, the renewable, alternative, and carbon-neutral energy systems are broadly studied in the
world. Especially, the material-based research for the energy production, storage, and conversion are
very important. In the field of energy storage, as one of good candidates for hydrogen storage, MgH2 has
been investigated, where the relevant defect species and their migration barriers have been determined.
In the field of energy conversion, the thermoelectric p-type Bi and Sb tellurides and n-type InGaZnO4
oxides are investigated by the calculations of Seebeck coefficient and electrical conductivity.
Contact Person : Prof. Byung Il Min(054-279-2074, bimin@postech.ac.kr)
"
“First-principles studies of novel complex
oxides heterointerfaces and energy-related”
♦Speaker : Dr. Min Sik Park (Missouri University)
♦Place : Physics Seminar Room (Science Bldg, 3-201)
♦Date & Time : June, 17(Wed) 4:00 ~ 5:00 pm
Abstract
Recently the study of novel heterointerfaces between complex oxides has been attractive because of its
peculiar physical properties at the interface which are not shown in bulk properties. In the heterointerfaces
of perovskites LaAlO3/SrTiO3 with a polarity discontinuity, the n-type metallic behavior had been measured
experimentally at the interface, contrary to insulating properties of two bulk materials. I will introduce our
previous results for the charge compensation mechanisms in the early stage of this field and also briefly
overview some of the recent issues. Furthermore, our recent study of the Fe3O4/ BaTiO3 interface, where
the effects of the charge imbalance, the strain, and the oxygen vacancies are important, will be presented.
For overcoming the energy crisis, such as the fossil fuels (oil, gas, coal) depletion and the global warming
by CO2, today, the renewable, alternative, and carbon-neutral energy systems are broadly studied in the
world. Especially, the material-based research for the energy production, storage, and conversion are
very important. In the field of energy storage, as one of good candidates for hydrogen storage, MgH2 has
been investigated, where the relevant defect species and their migration barriers have been determined.
In the field of energy conversion, the thermoelectric p-type Bi and Sb tellurides and n-type InGaZnO4
oxides are investigated by the calculations of Seebeck coefficient and electrical conductivity.
Contact Person : Prof. Byung Il Min(054-279-2074, bimin@postech.ac.kr)
"
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