[2017 DOES Seminar] DOES Seminar on May 1 by Dr. Gyung-Min Choi (Center for Spintronics, KIST)
- 2017-04-21
May 1 (Mon.), 16:30
Room 86120 (N Center), Sungkyunkwan University
Transport of energy and spin in timescale of nanoseconds to femtoseconds
By Dr. Gyung-Min Choi (Center for Spintronics, KIST )
Transport of energy and spin is governed by physical properties of materials, which are important in electronics, thermoelectric, and spintronics. Analyzing energy transport in timescale of nanosecond to picosecond reveals thermal conductivity of semiconductors and insulators, electron-phonon coupling in metals, and even anisotropic thermal conductivity of 2D materials. Recently, it has been demonstrated that energy transport can accompany spin transport. Energy transport in sub-nanoseconds at interface between magnetic metal and non-magnetic metal generates spin by spin-dependent Seebeck effect. Energy transport in picoseconds between electron and magnon generates spin by conservation of angular momentum during electron-magnon scattering. Ultimate timescale of femtoseconds for spin transport can be achieved by direct interaction between light and materials.
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Brief Bio
ㆍEducations
2011 – 2015 Ph. D. in Materials Science and Engineering, University of Illinois at Urbana-Champaign, U.S.
Dissertation: "Ultrafast laser driven spin generation in metallic ferromagnets.”
Advisor: David G. Cahill
2006 – 2008 M. S. in Materials Science and Engineering, KAIST, Republic of Korea.
Dissertation: "A study on the properties of CoFeB/MgO/CoFeB TMR junctions by modifying the MgO sputtering conditions."
Advisor: Taek-Dong Lee
1999 – 2003 B. S. in Materials Science and Engineering, KAIST, Republic of Korea.
ㆍProfessional Experiments
2008 – Current Senior Research Scientist, KIST
2003 – 2005 Korean Army
ㆍAward
2015 KIST award.
ㆍResearch Areas
Spintronics, Thermal transport, Ultrafast optical measurement, Magnetic memory