Qian Yingjie Zhang

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Large-scale single-crystalline AlN nanotip arrays have been fabricated via a facile catalysis-free approach using AlCl 3 powder and NH 3 as starting materials. These nanotips exhibit an intense broad ultraviolet emission centered at 3.28 eV. The field emission features a notable electron current with a low turn-on field. The turn-on and threshold electric(More)
We theoretically demonstrate versatile electronic properties of germanene monolayers under circularly, linearly, and elliptically polarized light. We show for the high frequency regime that the edge states can be controlled by tuning the amplitude of the light and by applying a static electric field. For circularly polarized light the band gap in one valley(More)
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