Structural dynamics of GaN microcrystals in evolutionary selection selective area growth probed by X-ray microdiffraction

Tools

Kachkanov, Vyacheslav V. and Leung, Benjamin B. and Song, Jie J. and Han, Jung J. and Zhang, Y. and Tsai, M.C. and Yuan, G. and Han, J. and O'Donnell, Kevin K. (2014) Structural dynamics of GaN microcrystals in evolutionary selection selective area growth probed by X-ray microdiffraction. Scientific Reports, 4. 4651. ISSN 2045-2322 (https://doi.org/10.1038/srep04651)

[thumbnail of srep04651]
Preview
 PDF. Filename: srep04651.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (1MB)| Preview

Abstract

A method to grow high quality, single crystalline semiconductor material irrespective of the substrate would allow a cost-effective improvement to functionality and performance of optoelectronic devices. Recently, a novel type of substrate-insensitive growth process called Evolutionary Selection Selective Area Growth (ES-SAG) has been proposed. Here we report the use of X-ray microdiffraction to study the structural properties of GaN microcrystals grown by ES-SAG. Utilizing high resolution in both direct and reciprocal spaces, we have unraveled structural dynamics of GaN microcrystals in growth structures of different dimensions. It has been found that the geometric proportions of the growth constrictions play an important role: 2.6â.Î 1/4m and 4.5â.Î 1/4m wide growth tunnels favor the evolutionary selection mechanism, contrary to the case of 8.6â.Î 1/4m growth tunnels. It was also found that GaN microcrystal ensembles are dominated by slight tensile strain irrespective of growth tunnel shape.

ORCID iDs

Kachkanov, Vyacheslav V., Leung, Benjamin B., Song, Jie J., Han, Jung J., Zhang, Y., Tsai, M.C., Yuan, G., Han, J. and O'Donnell, Kevin K. ORCID logoORCID: https://orcid.org/0000-0003-3072-3675;
  • Item type:Article
    ID code:47832
    Dates:
    Date
    Event
    11 April 2014
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:06 May 2014 13:25
    Last modified:12 Dec 2024 02:56
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/47832
CORE (COnnecting REpositories)