올림픽 토토PHYSICS/BK21 SEMINAR[09.07.08]

"
“Impurity doping effect in MgB2:
Scientific and Technological Issues”
  
? Speaker : Prof. Yong-Jihn Kim (Univ. of Puerto Rico)
? Place : Physics Seminar Room (Science Bldg, 3-201)
? Date & Time : July,올림픽 토토8(Wed)올림픽 토토4:00올림픽 토토~올림픽 토토5:00 pm

Abstract
  
MgB2올림픽 토토is올림픽 토토a올림픽 토토unique올림픽 토토BCS올림픽 토토type올림픽 토토High올림픽 토토Tc올림픽 토토superconductor.올림픽 토토Although올림픽 토토its superconductivity is due to the strong
electron-phonon interaction,올림픽 토토our understanding is not detailed enough to올림픽 토토find similar올림픽 토토high올림픽 토토Tc올림픽 토토materials. From a
technological point of view올림픽 토토MgB2 wires올림픽 토토can올림픽 토토be올림픽 토토used올림픽 토토for올림픽 토토MRI magnets and electricity transmission.

Impurity doping can provide important information on the superconducting mechanism올림픽 토토and올림픽 토토enhance the올림픽 토토high올림픽 토토field
properties올림픽 토토of올림픽 토토MgB2올림픽 토토wires올림픽 토토for technological applications. First, we explain the disorder induced evolution of two energy
gaps in MgB2 using the two band model and올림픽 토토the올림픽 토토scattered states. Second, we show that special class of impurities can
enhance올림픽 토토the high field properties of MgB2 significantly for MRI magnet applications and for올림픽 토토power올림픽 토토transmission올림픽 토토[Y-.J.
Kim,올림픽 토토US올림픽 토토patent올림픽 토토application올림픽 토토number, 20090033330].
    
  
Contact Person : Prof. Byung Il Min(054-279-2074, bimin@postech.ac.kr)"