Supersymmetry in carbon nanotubes in a transverse magnetic field

Article

关键词: ELECTRONIC-STRUCTURE;    ENERGY GAPS;   

DOI  :  10.1103/PhysRevB.68.155402

来源: SCIE

【 摘 要 】

Electron properties of carbon nanotubes in a transverse magnetic field are studied using a model of a massless Dirac particle on a cylinder. The problem possesses supersymmetry which protects low-energy states and ensures stability of the metallic behavior in arbitrarily large fields. In metallic tubes we find suppression of the Fermi velocity at half-filling and enhancement of the density of states. In semiconducting tubes the energy gap is suppressed. These features qualitatively persist (although to a smaller degree) in the presence of electron interactions. The possibilities of experimental observation of these effects are discussed.

【 授权许可】

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