* PHYSICS/BK21 SEMINAR *
관련링크
본문
"Atomic-scale engineering of complex-oxide heterostructures
연사: Dr. Ho Nyung Lee[Oak Ridge National Laboratory]
일시: 2007 년 10 월 4 일 15:00
장소: 물리학과 세미나실(공학3동 201호)
ABSTRACT:
Atomic-scale synthesis of complex-oxide thin films and heterostructures provides a new materials challenge to investigate the previously-unavailable phase space region. As we recently demonstrated that oxide heterostructures with hundreds of individual building blocks (single unit cell thick) of transition-metal perovskites could be artificially grown, yielding superlattices with atomically abrupt interfaces and surfaces, and highly-enhanced polar properties through proper balancing of constituent materials and strain preservation. The growth of such artificial oxide heterostructures, however, was a formidable task and it turned out that both the use of atomically-flat substrates, which provided an ideal starting point for building blocks thereon, and the precise control of individual layers were essential for heterostructures with compositionally sharp and well defined interfaces. In this seminar, I will present how we succeeded in growing almost perfect oxide heterostructures with desired properties by high-pressure pulsed laser deposition. A number of examples of artificial atomic-scale complex oxide heterostructures composed of ferroelectrics, (anti-)ferromagnetics, and/or insulators with unprecedented, enhanced physical properties and behaviors will be presented
문의처: 박재훈(054-279-2088, jhp@postech.ac.kr)
"
연사: Dr. Ho Nyung Lee[Oak Ridge National Laboratory]
일시: 2007 년 10 월 4 일 15:00
장소: 물리학과 세미나실(공학3동 201호)
ABSTRACT:
Atomic-scale synthesis of complex-oxide thin films and heterostructures provides a new materials challenge to investigate the previously-unavailable phase space region. As we recently demonstrated that oxide heterostructures with hundreds of individual building blocks (single unit cell thick) of transition-metal perovskites could be artificially grown, yielding superlattices with atomically abrupt interfaces and surfaces, and highly-enhanced polar properties through proper balancing of constituent materials and strain preservation. The growth of such artificial oxide heterostructures, however, was a formidable task and it turned out that both the use of atomically-flat substrates, which provided an ideal starting point for building blocks thereon, and the precise control of individual layers were essential for heterostructures with compositionally sharp and well defined interfaces. In this seminar, I will present how we succeeded in growing almost perfect oxide heterostructures with desired properties by high-pressure pulsed laser deposition. A number of examples of artificial atomic-scale complex oxide heterostructures composed of ferroelectrics, (anti-)ferromagnetics, and/or insulators with unprecedented, enhanced physical properties and behaviors will be presented
문의처: 박재훈(054-279-2088, jhp@postech.ac.kr)
"
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