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Volumn 111, Issue 8, 2011, Pages 1101-1110

Limits in detecting an individual dopant atom embedded in a crystal

Author keywords

ADF; Annular dark field; Dopant; Ge; High resolution; Imaging; Multislice; Scanning transmission electron microscope; Si; Simulations; STEM

Indexed keywords

ADF; DARK FIELD; DOPANT; HIGH RESOLUTION; MULTI SLICES; SCANNING TRANSMISSION ELECTRON MICROSCOPE; SIMULATIONS; STEM;

EID: 79960026132     PISSN: 03043991     EISSN: 18792723     Source Type: Journal    
DOI: 10.1016/j.ultramic.2011.03.002     Document Type: Article
Times cited : (31)

References (45)
  • 4
    • 0002600813 scopus 로고    scopus 로고
    • in: J.M. Rodenburg (Ed.), Institute of Physics Conference Series (EMAG Meeting Proceedings)
    • O.L. Krivanek, N. Dellby, A.J. Spence, R.A. Camps, L.M. Brown, in: J.M. Rodenburg (Ed.), Institute of Physics Conference Series (EMAG Meeting Proceedings), vol. 153, 1997, p. 35.
    • (1997) , vol.153 , pp. 35
    • Krivanek, O.L.1    Dellby, N.2    Spence, A.J.3    Camps, R.A.4    Brown, L.M.5
  • 25
    • 80051821842 scopus 로고    scopus 로고
    • Alternating (111) planes of atoms in Si are spaced apart at 0.8 and 2.35Å. Due to the unequal spacing, Si (111) cannot be sliced so that each slice contains exactly one plane of atoms. Therefore, STEM images with two slice thicknesses, 0.7 and 1Å, were simulated. Results show that both slice thicknesses lead to the same intensity around each atomic column
    • Alternating (111) planes of atoms in Si are spaced apart at 0.8 and 2.35Å. Due to the unequal spacing, Si (111) cannot be sliced so that each slice contains exactly one plane of atoms. Therefore, STEM images with two slice thicknesses, 0.7 and 1Å, were simulated. Results show that both slice thicknesses lead to the same intensity around each atomic column. Consequently, results are not sensitive to this small range of slice thicknesses, and 0.7Å slice thickness is used in Si (111) simulations.
  • 31
    • 80051822757 scopus 로고    scopus 로고
    • To calculate the error in visibility values, Si [100] Sn-doped specimen was imaged over a 7×7Å2 area using a 100keV aberration-corrected probe, averaged over 10 phonon configurations. This simulation was repeated nine times. The mean standard deviation between each set of 9 pixels was used as uncertainty for the intensity of an atomic column. Propagation of error calculation for the Eq. (1) led to less then 7% fractional uncertainty in visibility. Increasing the number of phonon configurations can further improve the accuracy in simulated results. Uncertainty due to experimental noise depends on the experimental setting and is not considered here.
    • To calculate the error in visibility values, Si [100] Sn-doped specimen was imaged over a 7×7Å2 area using a 100keV aberration-corrected probe, averaged over 10 phonon configurations. This simulation was repeated nine times. The mean standard deviation between each set of 9 pixels was used as uncertainty for the intensity of an atomic column. Propagation of error calculation for the Eq. (1) led to less then 7% fractional uncertainty in visibility. Increasing the number of phonon configurations can further improve the accuracy in simulated results. Uncertainty due to experimental noise depends on the experimental setting and is not considered here.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.