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Please use this identifier to cite or link to this item:
https://nccur.lib.nccu.edu.tw/handle/140.119/63532
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| Title: | Anomalous integer quantum Hall effect in AA-stacked bilayer graphene |
| Authors: | 郭光宇
Guo, Guang-Yu |
| Contributors: | 應物所 |
| Date: | 2010 |
| Issue Date: | 2014-01-24 12:23:16 (UTC+8) |
| Abstract: | Recent experiments indicate that -stacked bilayer graphenes (BLGs) could exist. Since the energy bands of the -stacked BLG are different from both the monolayer and -stacked bilayer graphenes, different integer quantum Hall effect in the -stacked graphene is expected. We have therefore calculated the quantized Hall conductivity and also longitudinal conductivity of the -stacked BLG within the linear-response Kubo formalism. Interestingly, we find that the -stacked BLG could exhibit both conventional insulating behavior (the plateau) and chirality for , where is the filling factor, is the chemical potential, and is the interlayer hopping energy, in striking contrast to the monolayer graphene and -stacked BLG. We also find that for , where , , and , the Hall conductivity is quantized as , if and , if . However, if , the plateaus are absent, where Furthermore, we find that when the magnetic field , , the plateau across would disappear and the step at would occur. Finally, we show that in the low-disorder and high-magnetic-field regime, , as long as the Fermi level is not close to a Dirac point. |
| Relation: | Physical Review B, 82(16), 165404 |
| Data Type: | article |
| DOI 連結: | http://dx.doi.org/10.1103/PhysRevB.82.165404 |
| DOI: | 10.1103/PhysRevB.82.165404 |
| Appears in Collections: | [應用物理研究所 ] 期刊論文
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| 165404.pdf | | 155Kb | Adobe PDF2 | 1702 | View/Open |
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