Dislocation and antiphase domain free microscale GaAs crystals grown on SiO2 from (001) Si nano-areas

Renard, C.; Cherkasin, N.; Jaffre, A.; Vincent, L.; Michel, A.; Molière, T.; Hamouche, R.; Yam, V.; Alvarez, J.; Fossard, F.; Mencaraglia, D.; Bouchier, D.
May 2013
Applied Physics Letters;5/13/2013, Vol. 102 Issue 19, p191915
Academic Journal
The epitaxial lateral overgrowth of microscale GaAs crystals on a 0.6 nm thick SiO2 layer from nanoscale Si seeds is investigated in order to develop GaAs monolithic hetero-epitaxy onto (001) Si. The nucleation from small width openings enables to avoid the emission of misfit dislocations and the formation of antiphase domains. Consequently, the interface between the GaAs island and the SiO2 layer remains perfectly sharp and free of defects. The only defects found by transmission electron microscopy in each island are pairs of twins, and a simple model based on the anisotropy of zinc blende crystal is proposed to explain their formation. Micro-photoluminescence measurements performed at room temperature show that these twins are not detrimental for the quality of microscale GaAs crystals.


Related Articles

  • Kinetic roughening of a ZnO grain boundary. Sung Bo Lee; Young-Min Kim; Dong-Su Ko; Tae-Young Ahn; Young-Woon Kim; Jucheol Park // Applied Physics Letters;5/10/2010, Vol. 96 Issue 19, p191906 

    Using a model ZnO bicrystal, we examine grain boundary kinetics by high-resolution transmission electron microscopy. The grain boundary undergoes a transition from atomically stepped to undulating appearances with increasing driving force for migration at a given temperature, producing clear...

  • Observation of Structural Vacancies in Titanium Monoxide Using Transmission Electron Microscopy. Valeeva, A. A.; Tang, G.; Gusev, A. I.; Rempel’, A. A. // Physics of the Solid State;Jan2003, Vol. 45 Issue 1, p87 

    Structural vacancies were directly observed in nonstoichiometric ordered titanium monoxide using high-resolution transmission electron microscopy under a magnification of 4 × 10[SUP6]. The observation of structural vacancies became possible due to their ordering and the formation of...

  • TEM study of Mg-Zn precipitates in Mg-Zn-Y alloys. Rao, J. C.; Song, M.; Furuya, K.; Yoshimoto, S.; Yamasaki, M.; Kawamura, Y. // Journal of Materials Science;May2006, Vol. 41 Issue 9, p2573 

    The precipitates in Mg-Zn-Y alloys in the as-cast state with nominal atomic composition of Mg96Zn1Y3, Mg96Zn2Y2 and Mg97Zn1Y2 were studied by means of TEM as well as XRD techniques. The results show that there is a phase separation of Zn on the nanometer scale in these alloys. Two kinds of...

  • Thermally Stimulated Relaxation of Misfit Strains in Si1 � xGex/Si(100) Heterostructures with Different Buffer Layers. Yugova, T. G.; Mil'vidskii, M. G.; Rzaev, M. M.; Sch�ffler, F. // Crystallography Reports;Nov2005, Vol. 50 Issue 6, p1020 

    The regularities of the defect formation in Si1 � xGex /Si heterostructures (x = 0.15 and 0.30), consisting of a low-temperature Si buffer layer and a SiGe solid solution, during their growth and subsequent annealings at temperatures 550�650�C are investigated by the methods of...

  • HRTEM Study of Biological Crystal Growth Mechanisms in the Vicinity of Implanted Synthetic Hydroxyapatite Crystals. Hemmerlé, J.; Cuisinier, F. J. G.; Schultz, P.; Voegel, J.-C. // Journal of Dental Research;Feb1997, Vol. 76 Issue 2, p682 

    Calcium phosphates are widely used as biomaterials. Ultrastructural assessments are of the utmost importance in our understanding of interfacial phenomena. The aim of this study was to learn more about the newly formed crystal growth mechanisms. The interfaces between implanted synthetic...

  • Intermediate phases in the hydrogen disproportionated state of NdFeB-type powders. Yi, G.; Chapman, J. N.; Brown, D. N.; Harris, I. R. // Journal of Applied Physics;8/15/2001, Vol. 90 Issue 4, p1924 

    Transmission electron microscopy studies have been carried out on partially disproportionated NdFeB-type alloys. A new intermediate magnetic (NIM) phase has been identified. Moreover, the lamella structure which subsequently develops from the tetragonal NIM phase comprises a tetragonal...

  • Microstructure and microwave dielectric properties of epitaxial SrTiO3 films on LaAIO3 substrates. Ryen, L.; Olsson, E.; Madsen, L.D.; Wang, X.; Edvardsson, C.N.L.; Jacobsen, S.N.; Helmersson, U.; Rudner, S.; Wernlund, L.-D. // Journal of Applied Physics;5/1/1998, Vol. 83 Issue 9, p4884 

    Presents a study to characterize Sr-deficient and stoichiometric epitaxial (001) SrTiO3 films, deposited on (110) rhombohedral LaA1O3 substrates by radio frequency (rf) magnetron sputtering. Utilization of high-resolution transmission electron microscopy; Details on methodology used to conduct...

  • Microstructural degradation during Zn diffusion in a GaInAsP/InP heterostructure: Layer mixing, misfit dislocation generation, and Zn3P2 precipitation. Park, Hyo-Hoon; Lee, Kyung Ho; Lee, Jung Kee; Lee, Yong Tak; Lee, El-Hang; Lee, Jeong Yong; Hong, Soon-Ku; Kwon, O’Dae // Journal of Applied Physics;11/1/1992, Vol. 72 Issue 9, p4063 

    Presents a study that investigated the microstructural degradation of a lattice-matched Ga[sub 0.28]In[sub 0.72]As[sub 0.61]P[sub 0.39]/InP heterointerface during zinc diffusion using high resolution transmission electron microscopy and Auger electron microscopy. Details of the experiment;...

  • Microstructure investigations of Pt-modified ? prime-Ni3Al + ?-Ni coatings on Ni-based superalloys. Guanghui Cao; Taoping Ou; Hua Jiang; Russell, Alan M. // Journal of Materials Research;Jun2010, Vol. 25 Issue 6, p25 

    The microstructure of Pt-modified γ'-Ni3Al + γ-Ni coating on CMSX-4 single-crystal superalloy has been investigated by transmission electron microscopy (TEM). Cross-sectional TEM analyses showed the presence of precipitates in the coating. This precipitate was identified as the hexagonal...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics