Chin. Phys. Lett.  2012, Vol. 29 Issue (3): 036803    DOI: 10.1088/0256-307X/29/3/036803
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
Effect of Multiple Depositions and Annealing Treatments on the Erbium Silicide Nanoislands Self-Assembled on Si(001) Substrates
DING Tao1,2**, SONG Jun-Qiang3, CAI Qun2
1Institute of Precision Optical Engineering, Department of Physics, Tongji University, Shanghai 200092
2State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433
3CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
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SONG Jun-Qiang, DING Tao, CAI Qun 2012 Chin. Phys. Lett. 29 036803
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Abstract Erbium silicide nanoislands on Si(001) surface are fabricated by novel multiple depositions and annealing treatments method. The morphological investigations determine that the islands could grow with stable square shapes rather than the shape transformation exhibited in the traditional single time evaporation growth. Size distributions analyses further elucidate the effect of multiple depositions and annealing treatments on the nanoisland growth. It is suggested that strain relaxation and static coalescence play important roles in the cyclic growth. Specifically, after 15 times of the cycles, the larger islands are found to undergo the Ostwald ripening, which make the shape of nanoislands irregular. This gives us the direction to adjust the growth parameters to control the island morphology. Furthermore, the crystalline structure of the Er silicide nanoislands is efficiently characterized by grazing incidence synchrotron x-ray diffraction.
Keywords: 68.37.-d      68.55.-a      68.55.J-     
Received: 17 June 2011      Published: 11 March 2012
PACS:  68.37.-d (Microscopy of surfaces, interfaces, and thin films)  
  68.55.-a (Thin film structure and morphology)  
  68.55.J- (Morphology of films)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/3/036803       OR      https://cpl.iphy.ac.cn/Y2012/V29/I3/036803
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SONG Jun-Qiang
DING Tao
CAI Qun
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