“Scanning Tunneling Spectroscopic Studies of Dirac Fermions in Graphene and Topological Insulators” N.-C. Yeh, M. L. Teague, R. T.-P. Wu, H. Chu, D. A. Boyd, M. W. Bockrath, L. He, F.-X. Xiu and K.-L. Wang, EPJ Web of Conferences 23, 00021 (2012); [DOI:10.1051/epjconf/20122300021].
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