Work by Wladek Walukiewicz and Kin Man Yu on spintronics resolved a long-standing controversy regarding ferromagnetism in dilute magnetic semiconductors, February 2012. (news story)
U.S. Patent No. 8,039,740, "Single P-N junction tandem photovolatic device," by Walukiewicz, Ager and Yu, has been issued, October 2011. (patent)
Kin Man Yu has made a nice website about his impressive new RBS machine.
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