Magnetism in germanium-doped boron-nitride nanotubes

Add time:08/04/2019    Source:sciencedirect.com

The magnetic property of the pristine and germanium-doped (10, 0) boron-nitride (BN) nanotube has been studied using a DFT-LSDA method. The germanium substitution for either a single boron or single nitrogen atom yields a spin-polarized, almost dispersionless π bands within the original band gap and net magnetic moment is 1μB. The flat band originates from the local structural deformation in the vicinity of germanium atom. Contrast to the theoretical models based on carbon or silicon-doped BN nanotubes, substituting a nitrogen atom with germanium atom results in three pairs of in-gap states which indicates more extended nanotube deformation than those previously studied.

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