Quantum corrections crossover and ferromagnetism in magnetic topological insulators.
Quantum corrections crossover and ferromagnetism in magnetic topological insulators.
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DOI:
10.1038/srep02391
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发表时间:
2013
影响因子:
4.6
通讯作者:
Xiu, Faxian
中科院分区:
文献类型:
--
作者:
Bao, Lihong;Wang, Weiyi;Meyer, Nicholas;Liu, Yanwen;Zhang, Cheng;Wang, Kai;Ai, Ping;Xiu, Faxian
Revelation of emerging exotic states of topological insulators (TIs) for future quantum computing applications relies on breaking time-reversal symmetry and opening a surface energy gap. Here, we report on the transport response of Bi2Te3 TI thin films in the presence of varying Cr dopants. By tracking the magnetoconductance (MC) in a low doping regime we observed a progressive crossover from weak antilocalization (WAL) to weak localization (WL) as the Cr concentration increases. In a high doping regime, however, increasing Cr concentration yields a monotonically enhanced anomalous Hall effect (AHE) accompanied by an increasing carrier density. Our results demonstrate a possibility of manipulating bulk ferromagnetism and quantum transport in magnetic TI, thus providing an alternative way for experimentally realizing exotic quantum states required by spintronic applications.
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