@article{8ab9dca53d024503b06aee80c16c5d09,
title = "Evidence of the two surface states of (Bi 0.53 Sb 0.47) 2 Te 3 films grown by van der Waals epitaxy",
abstract = "The discovery of topological insulators (TIs) has led to numerous exciting opportunities for studying topological states of quantum physics and for exploring spintronic applications due to the new physics arising from their robust metallic surface states. Here, we report the high-quality topological insulator (Bi x Sb 1-x) 2 Te 3 thin films using a single van der Waals GaSe buffer layer. As a result, ultra-low surface carrier density of 1.3 × 10 12 {\^a}€...cm -2 and a high Hall mobility of 3100{\^a}€...cm 2 /Vs have been achieved for (Bi 0.53 Sb 0.47) 2 Te 3. The high-quality films enable us to observe quantum oscillations associated with the top and bottom surface states and to manipulate the Dirac electrons and bulk holes' conduction properties. The observation of the two surface states may lead to a path towards the implementation of TIs in spintronics.",
author = "Liang He and Xufeng Kou and Murong Lang and Choi, {Eun Sang} and Ying Jiang and Tianxiao Nie and Wanjun Jiang and Yabin Fan and Yong Wang and Faxian Xiu and Wang, {Kang L.}",
note = "Funding Information: The authors would like to thank the support from Defense Advanced Research Projects Agency (DARPA) with grants N66001-12-1-4034 and N66001-11-1-4105. K.W. also acknowledges the support of the Raytheon endowed chair professorship. F.X. would like to acknowledge financial supports from the National Young 1000 Talents Plan and Pu Jiang Talent Plan in Shanghai. Y.W. acknowledges support from Natural Science Foundation of China (11174244) and Zhejiang Provincial Natural Science Foundation of China (LR12A04002) and National Young 1000 Talents Plan.",
year = "2013",
month = dec,
day = "3",
doi = "10.1038/srep03406",
language = "English",
volume = "3",
journal = "Scientific reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
}