| Orbital diamagnetism of weakly doped bilayer graphene in a magnetic field. | |
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MedLine Citation:
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PMID: 21558597 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We investigate the orbital diamagnetism of weakly doped bilayer graphene (BLG) in a spatially smoothly varying magnetic field and obtain the general analytic expression for the orbital susceptibility of BLG, with finite wavenumber and Fermi energy, at zero temperature. We find that the magnetic field screening factor of BLG is dependent on the wavenumber, which results in a more complicated screening behavior compared with that of monolayer graphene (MLG). We also study the induced magnetization and electric current in BLG, under a nonuniform magnetic field, and find that they are qualitatively different from those for MLG and the two-dimensional electron gas (2DEG). However, as for MLG, a magnetic object placed above BLG is repelled by a diamagnetic force from the BLG, which is approximately equivalent to the force produced by its mirror image on the other side of the BLG with a reduced amplitude dependent on the typical length of the systems. BLG shows crossover behaviors in the responses to the external magnetic field, intermediate between those of MLG and 2DEG. |
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Authors:
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Min Lv; Shaolong Wan |
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Publication Detail:
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Type: Journal Article Date: 2011-05-10 |
Journal Detail:
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Title: Journal of physics. Condensed matter : an Institute of Physics journal Volume: 23 ISSN: 1361-648X ISO Abbreviation: J Phys Condens Matter Publication Date: 2011 Jun |
Date Detail:
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Created Date: 2011-05-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101165248 Medline TA: J Phys Condens Matter Country: England |
Other Details:
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Languages: eng Pagination: 215306 Citation Subset: IM |
Affiliation:
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Institute for Theoretical Physics and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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