TY - JOUR
T1 - Real-space identification of the CZT(1 1 0) surface atomic structure by scanning tunneling microscopy
AU - Cohen-Taguri, G.
AU - Levinshtein, M.
AU - Ruzin, Arie
AU - Goldfarb, I.
N1 - Funding Information:
This research was supported by THE ISRAEL SCIENCE FOUNDATION (Grant No. 200/05). The authors gratefully acknowledge the assistance of Z. Barkay with the ESEM.
PY - 2008/2/1
Y1 - 2008/2/1
N2 - Various sputter-anneal treatments in-vacuum were applied to cleaved Cd0.9Zn0.1Te(1 1 0) surfaces. The morphology, stoichiometry, orientation and the atomic structures were investigated on "as-cleaved" as well as on sputter-annealed surfaces. The studies were conducted by in-situ scanning probe microscopy, in scanning tunneling and atomic force modes, low- and reflection high-energy electron diffraction, and Auger electron spectroscopy. Additional ex-situ investigation methods, such as electron back scattered diffraction and energy dispersive spectroscopy in a scanning electron microscope were applied. Such treatments resulted in a clean, unreconstructed (1 × 1) surface, which was structurally ordered, even if somewhat rough on the atomic scale. The optimal treatment found in this work consists of several cycles of 1.0 keV sputtering followed by 2 h annealing at 180 °C, despite some compositional changes, most notably Cd enrichment at the surface. The morphology of the surface was shown to depend on the sputtering energy, unlike the (1 × 1) atomic structure.
AB - Various sputter-anneal treatments in-vacuum were applied to cleaved Cd0.9Zn0.1Te(1 1 0) surfaces. The morphology, stoichiometry, orientation and the atomic structures were investigated on "as-cleaved" as well as on sputter-annealed surfaces. The studies were conducted by in-situ scanning probe microscopy, in scanning tunneling and atomic force modes, low- and reflection high-energy electron diffraction, and Auger electron spectroscopy. Additional ex-situ investigation methods, such as electron back scattered diffraction and energy dispersive spectroscopy in a scanning electron microscope were applied. Such treatments resulted in a clean, unreconstructed (1 × 1) surface, which was structurally ordered, even if somewhat rough on the atomic scale. The optimal treatment found in this work consists of several cycles of 1.0 keV sputtering followed by 2 h annealing at 180 °C, despite some compositional changes, most notably Cd enrichment at the surface. The morphology of the surface was shown to depend on the sputtering energy, unlike the (1 × 1) atomic structure.
KW - AFM, STM, AES
KW - Cadmium zinc telluride
KW - Ion bombardment
KW - LEED, RHEED
KW - Sputtering
UR - http://www.scopus.com/inward/record.url?scp=38749110753&partnerID=8YFLogxK
U2 - 10.1016/j.susc.2007.11.026
DO - 10.1016/j.susc.2007.11.026
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AN - SCOPUS:38749110753
SN - 0039-6028
VL - 602
SP - 712
EP - 723
JO - Surface Science
JF - Surface Science
IS - 3
ER -