1 J.. Gao, L.R. Vale, J.A.B. Mates, D.R. Schmidt, G.C. Hilton, K.D. Irwin, F.. Mallet, M.A. Castellanos-Beltran, K.W. Lehnert, J.. Zmuidzinas, and H.G. Leduc, Applied Physics Letters 98, (2011).
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