Equilibrium shape of steps and islands on polar CdTe(001) surface: application to the preparation of self organized templates for growth of nanostructures

Martrou, D.; Magnéa, N.

doi:10.1016/s0040-6090(00)00662-3

Cited by 8 publications

(5 citation statements)

References 21 publications

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“…Metal-rich MBE growth of (001) CdTe was found to produce [100] step edges. 27,28 The x-ray measurements of the CdZnTe substrate indicate an average 0.3°misorientation from the (111). The HgCdTe epilayer is azimuthally tilted by 0.1°with respect to the CdZnTe substrate (Fig.…”

Section: As-grown Lwir Lpe (111)a Hgcdtementioning

confidence: 99%

Surface structure of (111)A HgCdTe

Benson

Varesi

Stoltz

et al. 2006

Journal of Elec Materi

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The surface of (111)A HgCdTe has been studied by reflection high-energy electron diffraction and atomic force microscopy (AFM). The as-grown liquid-phase epitaxy (LPE) surface has bilayer (3.7 6 0.2 Å ) step/terrace structures, macro-steps, and cross-hatch patterns. Macro-steps occur about the [11 2] and are from 10-40 Å in height. AFM and x-ray measurements indicate the as-grown epilayer is 0.2°off-cut (random polar angle) from the (111). ,110. cross-hatch lines consistent with bilayer (step height 5 3.9 6 0.2 Å ) {111} slip dislocation are observed. The native oxide/carbon layer for the as-grown LPE (111)A HgCdTe is 8 Å . The experimental results suggest that the as-grown LPE surface approximates an equilibrium vicinal crystal structure. The 0.1% Br:ethylene glycol wet chemically etched surfaces retained the macro-step structure, but numerous small protrusions (10-100 Å height, 300 Å diameter) developed. The plasma-etched (111)A HgCdTe surface is crystalline, but exhibits surface disorder and is roughened.

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Section: As-grown Lwir Lpe (111)a Hgcdtementioning

confidence: 99%

Surface structure of (111)A HgCdTe

Benson

Varesi

Stoltz

et al. 2006

Journal of Elec Materi

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“…3). These features which contrast with what is observed for (001) Si and GaAs surfaces, can be explained by the strong ionicity of the atomic bonding in these materials which induces a large electrostatic interaction between charged atoms on the step edges [18]. As a consequence these experimental results have been used to find out and to prepare the vicinal surfaces suitable for growing self-organized quantum structures.…”

Section: Artificial Organization Of Cdte Nanostructuresmentioning

confidence: 85%

“…The checkerboard structure which appears on a A-type vicinal surface is an appropriate template to grow quantum dots and to force them to have an in-plane ordering [18,20]. Such results are presented in Fig.…”

Section: Artificial Organization Of Cdte Nanostructuresmentioning

confidence: 95%

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CdTe-Based Nanostructures

Mariette

2010

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“…19,20 Nano-scale surface clustering as well as step flow growth for (001) CdTe has also been previously observed. 6,21,22 The surface has an RMS roughness of %5.0 nm, 2 to 3 times rougher than HgCdTe/CdZnTe surface. No cross-hatch pattern for CdTe/ZnTe/Si has been observed.…”

Section: Cross-hatch Patternmentioning

confidence: 99%

Surface Structure of Molecular Beam Epitaxy (211)B HgCdTe

Benson

Almeida

Carmody

et al. 2007

Journal of Elec Materi

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The as-grown molecular beam epitaxy (MBE) (211)B HgCdTe surface has variable surface topography, which is primarily dependent on substrate temperature and substrate/epilayer mismatch. Nano-ripple formation and cross-hatch patterning are the predominant structural features observed. Nano-ripples preferentially form parallel to the ½ " 111 and are from 0 Å to 100 Å in height with a wavelength between 0.1 lm and 0.8 lm. Cross-hatch patterns result from slip dislocations in the three {111} planes intersecting the (211) growth surface. The cross-hatch step height is 4 ± 1 Å (limited data set). This indicates that only a bi-layer slip (Hg/Cd + Te) in the {111} slip plane occurs. For the deposition of MBE (211)B HgCdTe/CdTe/Si, the reorientation of multiple nano-ripples coalesced into ''packets'' forms cross-hatch patterns. The as-grown MBE (211)B CdTe/Si surface is highly variable but displays nanoripples and no cross-hatch pattern. Three types of defects were observed by atomic force microscopy (AFM): needle, void/hillock, and voids.

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Equilibrium shape of steps and islands on polar CdTe(001) surface: application to the preparation of self organized templates for growth of nanostructures

Cited by 8 publications

References 21 publications

Surface structure of (111)A HgCdTe

Surface structure of (111)A HgCdTe

CdTe-Based Nanostructures

Surface Structure of Molecular Beam Epitaxy (211)B HgCdTe

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