Medford, J. [P:(DE-HGF)0] ; Beil, J. [P:(DE-HGF)0] ; Taylor, J. M. [P:(DE-HGF)0] ; Bartlett, S. D. [P:(DE-HGF)0] ; Doherty, A. C. [P:(DE-HGF)0] ; Rashba, E. I. [P:(DE-HGF)0] ; DiVincenzo, David [P:(DE-Juel1)143759] ; Lu, H. [P:(DE-HGF)0] ; Gossard, A. C. [P:(DE-HGF)0] ; Marcus, C. M. [P:(DE-HGF)0]