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Spontaneously Conversion from Film to High Crystalline Quality Stripe during Molecular Beam Epitaxy for High Sn Content GeSn.

Abstract：

:Two series of Ge0.8Sn0.2 samples were grown on Ge buffered Si substrate by molecular beam epitaxy (MBE) to investigate the influence of growth temperature and film thickness towards the evolution of surface morphology. A novel phenomena was observed that the Ge0.8Sn0.2 film was segregated and relaxed by the formation of GeSn stripes on the film. Under specific growth condition, the stripes can cover nearly the whole surface. XRD, TEM, AFM, PL and TEM results indicated that the stripes are high quality single crystalline GeSn with Sn content around 5%. The formation of GeSn stripes proposes an effective strategy to fabricate high crystalline quality GeSn stripe on Si, where the Ge0.8Sn0.2 film serves as precursor and the segregated Sn works as catalyst droplets. This technique has great potential for future optoelectronic and microelectronic applications.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Wang N,Xue C,Wan F,Zhao Y,Xu G,Liu Z,Zheng J,Zuo Y,Cheng B,Wang Q

doi

10.1038/s41598-020-63152-y

subject

Has Abstract

pub_date

2020-04-09 00:00:00

pages

6161

issue

1

issn

2045-2322

pii

10.1038/s41598-020-63152-y

journal_volume

10

pub_type

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