Tu, C. M.C. M.TuYeh, T. T.T. T.YehTzeng, W. Y.W. Y.TzengChen, Y. R.Y. R.ChenChen, H. J.H. J.ChenKu, S. A.S. A.KuLuo, C. W.C. W.LuoLin, J. Y.J. Y.LinWu, K. H.K. H.WuJuang, J. Y.J. Y.JuangKobayashi, T.T.KobayashiCheng, C. M.C. M.ChengTsuei, K. D.K. D.TsueiBerger, H.H.BergerSankar, R.R.SankarChou, F. C.F. C.Chou2020-04-212020-04-21201520452322https://scholars.lib.ntu.edu.tw/handle/123456789/484978Manifestation of a Second Dirac Surface State and Bulk Bands in THz Radiation from Topological Insulatorsjournal article10.1038/srep14128