Abstract

Using first principles calculations, we investigate the electronic properties of boron nanoribbons. The boron nanoribbons are constructed from the stable boron sheet. The bare boron nanoribbons with different edges are metals. The boron nanoribbons with two-hydrogen passivated on the zigzag edges become semiconductors and are more stable than the one-hydrogen passivated ones. The band gaps are within the range of 0.5eV and there is an oscillatory variation in the band gaps with the change of widths due to the even-odd number of nanoribbon widths.

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