@article{6914abbd58f846af8fd3f825a08710c3,
title = "Direct transition resonance in atomically uniform topological Sb(111) thin films",
abstract = "Atomically uniform Sb(111) films are fabricated by the method of molecular beam epitaxy on an optimized Si(111) surface. Two-dimensional quantum well states and topological surface states in these films are well resolved as measured by angle-resolved photoemission spectroscopy. We observe an evolution of direct transition resonances by varying the excitation photon energy (and thus the perpendicular crystal momentum). The experimental results are reproduced in a comprehensive model calculation taking into account first-principles calculated initial states and time-reversed low-energy-electron-diffraction final states in the photoexcitation process. The resonant behavior illustrates that the topological surface states and the quantum well states are analytically connected in momentum space in all three dimensions.",
author = "Guang Bian and Caizhi Xu and Chang, {Tay Rong} and Xiaoxiong Wang and Saavanth Velury and Jie Ren and Hao Zheng and Jeng, {Horng Tay} and T. Miller and Hasan, {M. Zahid} and Chiang, {T. C.}",
note = "Funding Information: This work was supported by the U.S. Department of Energy (DOE) Grant No. DE-FG02-07ER46383 (T.C.C.), the U.S. National Science Foundation (NSF) Grant No. NSF-DMR-1006492 (M.Z.H.), the National Science Foundation of China under Grant No. 11204133 (X.W.), the Jiangsu Province Natural Science Foundation of China under Grant No. BK2012393 (X.W.), and the Young Scholar Project of Nanjing University of Science and Technology (X.W.). T.R.C. acknowledges visiting scientist support from Princeton University. T.R.C. and H.T.J. are supported by the National Science Council, Academia Sinica, and National Tsing Hua University, Taiwan. We also thank NCHC, CINC-NTU, and NCTS, Taiwan for technical support. We thank M. Bissen and M. Severson for assistance with beamline operation at the Synchrotron Radiation Center, which was supported by the University of Wisconsin-Madison. T.M. and the beamline operations were partially supported by U.S. NSF Grant No. NSF-DMR-1305583. Publisher Copyright: {\textcopyright} 2015 American Physical Society.",
year = "2015",
month = dec,
day = "2",
doi = "10.1103/PhysRevB.92.241401",
language = "English (US)",
volume = "92",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "24",
}