DOI:https://doi.org/10.1103/PhysRevLett.107.149901
© 2011 American Physical Society
J. F. Chen, Shanchao Zhang, Hui Yan, M. M. T. Loy, G. K. L. Wong, and Shengwang Du
Vol. 107, Iss. 14 — 30 September 2011
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