Hexagonal arrangement of Ge clusters self-organized on a template of half unit cells of Si(1 1 1)-7 x 7 observed by scanning tunneling microscopy

by: ZA Ansari, T Arai, M Tomitori

Surface Science, Vol. 574, No. 2-3. (10 January 2005), pp. L17-L22.

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Abstract

We observe initial nucleation of Ge clusters and their arrangement on Si(1 1 1)-7 x 7 by ultrahigh-vacuum scanning tunneling microscopy on an atomic scale; germanium amounts of sub-monolayer are slowly deposited at room temperature at a rate of 0.005 ML/min, and post-annealed. The clusters are arranged uncovering the corner holes and dimer rows of 7 x 7 structure, resulting in a regular hexagonal arrangement of Ge clusters with a periodicity of half unit cell of 7 x 7. This presents direct evidence of the self-organized hexagonal arrangement formed on a template of the 7 x 7 periodicity, which has been under debate between Yan et al. [Surf. Sci. 506 (2002) L255] and Ratto and Rosei [Discussion: Surf. Sci. 530 (2003) 221].

@article{citeulike:764934, abstract = {We observe initial nucleation of Ge clusters and their arrangement on Si(1 1 1)-7 x 7 by ultrahigh-vacuum scanning tunneling microscopy on an atomic scale; germanium amounts of sub-monolayer are slowly deposited at room temperature at a rate of 0.005 ML/min, and post-annealed. The clusters are arranged uncovering the corner holes and dimer rows of 7 x 7 structure, resulting in a regular hexagonal arrangement of Ge clusters with a periodicity of half unit cell of 7 x 7. This presents direct evidence of the self-organized hexagonal arrangement formed on a template of the 7 x 7 periodicity, which has been under debate between Yan et al. [Surf. Sci. 506 (2002) L255] and Ratto and Rosei [Discussion: Surf. Sci. 530 (2003) 221].}, author = {Ansari, Z. A. and Arai, T. and Tomitori, M. }, citeulike-article-id = {764934}, doi = {10.1016/j.susc.2004.10.051}, journal = {Surface Science}, keywords = {clusters, si-7x7}, month = {January}, number = {2-3}, pages = {L17--L22}, posted-at = {2006-07-19 17:44:19}, priority = {2}, title = {Hexagonal arrangement of Ge clusters self-organized on a template of half unit cells of Si(1 1 1)-7 x 7 observed by scanning tunneling microscopy}, url = {http://dx.doi.org/10.1016/j.susc.2004.10.051}, volume = {574}, year = {2005} }

RIS record

TY - JOUR ID - citeulike:764934 L3 - citeulike-article-id:764934 TI - Hexagonal arrangement of Ge clusters self-organized on a template of half unit cells of Si(1 1 1)-7 x 7 observed by scanning tunneling microscopy JF - Surface Science VL - 574 IS - 2-3 SP - L17 EP - L22 N2 - We observe initial nucleation of Ge clusters and their arrangement on Si(1 1 1)-7 x 7 by ultrahigh-vacuum scanning tunneling microscopy on an atomic scale; germanium amounts of sub-monolayer are slowly deposited at room temperature at a rate of 0.005 ML/min, and post-annealed. The clusters are arranged uncovering the corner holes and dimer rows of 7 x 7 structure, resulting in a regular hexagonal arrangement of Ge clusters with a periodicity of half unit cell of 7 x 7. This presents direct evidence of the self-organized hexagonal arrangement formed on a template of the 7 x 7 periodicity, which has been under debate between Yan et al. [Surf. Sci. 506 (2002) L255] and Ratto and Rosei [Discussion: Surf. Sci. 530 (2003) 221]. KW - clusters KW - si-7x7 AU - Ansari, ZA AU - Arai, T AU - Tomitori, M PY - 2005/01/10/ UR - http://dx.doi.org/10.1016/j.susc.2004.10.051 ER -

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