Scientific Computing Seminar

Date:

Tuesday, April 6, 2004

Time:

10:00am-11:00am

Location:

50F-1647

Seminar Speaker:

Byounghak Lee
University of Illinois at Urbana-Champaign

Title:

Theory of Ferromagnetic Semiconductors; Toward Semiconductor Spintronics

Abstract:

Diluted magnetic semiconductors are promising candidates for possible semiconductor spintronics. In spite of the large amount of experimental knowledge that has been accumulated, the comprehensive theoretical understanding of the long-range order has been hampered by the complicated nature of the material. The interplay of exchange energy between itinerant electrons and localization spins, spin-orbit coupling effects in the host semiconductors, and impurity disorder effects requires intense numerical studies. I will present theories based on effective mass approximation, local spin density approximation, and multi-band tight-binding model. The result of each theory and application to semiconductor heterostructures will be discussed. I will also discuss technical issues on numerical calculations.

Sponsor of Seminar:

Lin-Wang Wang

Scientific Computing

Contact Esmond G. Ng EGNg@lbl.gov