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- W2053128408 abstract "Magnetization (M) comes from both the persistent currents and the spin polarization. The spin-B interaction is important in a graphene tubule, because it makes the one-dimensional subband with the divergent density of states capable of crossing the Fermi level (${mathit{E}}_{mathit{F}}$=0 eV). It causes cusps in magnetization and power divergencies in differential susceptibility (${mathrm{ensuremath{chi}}}_{mathit{M}}$), and destroys the periodicity (period ${mathrm{ensuremath{varphi}}}_{0}$=hc/e) of the physical properties. The special structures shown in M and ${mathrm{ensuremath{chi}}}_{mathit{M}}$ are found to be insensitive to the chirality. The power divergencies in ${mathrm{ensuremath{chi}}}_{mathit{M}}$ are replaced by the peak structures at low temperature (T). The order of ${mathrm{ensuremath{chi}}}_{mathit{M}}$ is ${10}^{mathrm{ensuremath{-}}4}$--${10}^{mathrm{ensuremath{-}}5}$; therefore, the peak structures are measurable at Tensuremath{le}1 K. The temperature effect in reducing magnetization is relatively obvious for a larger semiconducting tubule. Moreover, the anomalous temperature effect due to the spin-B interaction exists in all the metallic tubules at the relatively low T. For the doped graphene tubule, M and ${mathrm{ensuremath{chi}}}_{mathit{M}}$ exhibit more special structures, since both the electronic structure and the finite Fermi level vary with ensuremath{varphi} simultaneously. The magnetic response is enhanced by the doping, and it is relatively strong for a larger tubule. The magnetism at the small flux is possibly altered from paramagnetism (diamagnetism) to diamagnetism (paramagnetism) by varying the free-carrier density." @default.
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- W2053128408 date "1995-09-15" @default.
- W2053128408 modified "2023-09-27" @default.
- W2053128408 title "Magnetization of graphene tubules" @default.
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- W2053128408 doi "https://doi.org/10.1103/physrevb.52.8423" @default.
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