http://repository.iitr.ac.in/handle/123456789/25986| Title: | Two-dimensional weak anti-localization in Bi2Te3 thin film grown on Si(111)-(7 × 7) surface by molecular beam epitaxy |
| Authors: | Roy A. Guchhait S. Sonde S. Dey R. Pramanik, Tanmoy Rai A. Movva H.C.P. Colombo L. Banerjee S.K. |
| Published in: | Applied Physics Letters |
| Abstract: | We report on low temperature transport studies of Bi2Te 3 topological insulator thin films grown on Si(111)-(7 × 7) surface by molecular beam epitaxy. A sharp increase in the magnetoresistance with magnetic field at low temperature indicates the existence of weak anti-localization. The measured weak anti-localization effect agrees well with the Hikami-Larkin-Nagaoka model, and the extracted phase coherence length shows a power-law dependence with temperature indicating the existence of a two-dimensional system. An insulating ground state has also been observed at low temperature showing a logarithmic divergence of the resistance that appears to be the influence of electron-electron interaction in a two-dimensional system. © 2013 AIP Publishing LLC. |
| Citation: | Applied Physics Letters, 102(16) |
| URI: | https://doi.org/10.1063/1.4803018 http://repository.iitr.ac.in/handle/123456789/25986 |
| Issue Date: | 2013 |
| Keywords: | Anti-localization effects Logarithmic divergence Low temperatures Phase-coherence length Power-law dependences Sharp increase Topological insulators Two-dimensional systems Electron-electron interactions Epitaxial growth Molecular beam epitaxy Silicon Temperature Thin films Two dimensional |
| ISSN: | 36951 |
| Author Scopus IDs: | 35180233300 6602542843 26221975300 57225425824 55938287000 55672148400 51764085900 7102464650 55566203800 |
| Author Affiliations: | Roy, A., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States Guchhait, S., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States Sonde, S., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States Dey, R., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States Pramanik, T., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States Rai, A., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States Movva, H.C.P., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States Colombo, L., Texas Instruments, 12500 TI Boulevard, Dallas, TX 75266, United States Banerjee, S.K., Microelectronics Research Center, University of Texas at Austin, Austin, TX 78758, United States |
| Funding Details: | This work was supported by the NRI SWAN Center. We also appreciate technical support from Omicron and Quantum Design. |
| Corresponding Author: | Microelectronics Research Center, , Austin, TX 78758, United States |
| Appears in Collections: | Journal Publications [ECE] |
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