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Two-step formation of gallium droplets with high controllability of size and density

机译:两步形成镓液滴,具有高度的尺寸和密度可控性

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摘要

We demonstrate the two-step formation of Ga droplets, which consists of the first formation at a high temperature followed by the second formation at a low temperature. The first droplets provide the Ga-richest surface, on which the second droplets start to nucleate almost immediately after deposition. This facilitates precise control of the amount of second droplets, leading to the reproducible formation of small Ga droplets with low density. These Ga droplets are crystallized into GaAs quantum dots by irradiating As flux, which allows single-dot spectroscopy without sample fabrication.
机译:我们演示了Ga液滴的两步形成过程,该过程由高温下的第一步形成和低温下的第二步形成组成。第一液滴提供了最富Ga的表面,第二液滴几乎在沉积后立即开始成核。这有助于精确控制第二液滴的数量,从而导致可重复形成低密度的小Ga液滴。这些Ga液滴通过照射As通量而结晶为GaAs量子点,这使得无需样品制造即可进行单点光谱。

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