1. Experimental evidence and control of the bulk-mediated intersurface coupling in topological insulator Bi2Te2Se nanoribbons.
- Author
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Zhaoguo Li, Garate, Ion, Jian Pan, Xiangang Wan, Taishi Chen, Wei Ning, Xiaoou Zhang, Fengqi Song, Yuze Meng, Xiaochen Hong, Xuefeng Wang, Li Pi, Xinran Wang, Baigeng Wang, Shiyan Li, Reed, Mark A., Glazman, Leonid, and Guanghou Wang
- Subjects
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COUPLING constants , *SPIN-spin interactions , *PARTICLES (Nuclear physics) , *NANORIBBONS , *ELECTRIC insulators & insulation research - Abstract
We present evidence for the existence and control of bulk-surface coupling in Bi2Te2Se nanoribbons. Our magnetoresistance measurements reveal that the number of coherent channels contributing to quantum interference in the nanoribbons changes abruptly when the film thickness exceeds the bulk phase relaxation length. We interpret this observation as an evidence for bulk-mediated coupling between metallic states located on opposite surfaces. This hypothesis is supported by additional magnetoresistance measurements conducted under a set of gate voltages and in a parallel magnetic field, the latter of which alters the intersurface coupling in a controllable way. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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