Oxidation in air and thermal desorption on PbTe, SnTe and Pb0.8Sn0.2Te Surfaces

Bettini, M.; Richter, H. J.

doi:10.1016/0039-6028(79)90694-0

Cited by 42 publications

(27 citation statements)

References 12 publications

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“…We did not find the Te 0 component, which was reported in Ref. 4; however, it may be found in the spectra if the satellite subtraction operation is not undertaken. Pb 4f spectra are best fitted with two components for each of the doublet peaks, as shown in Fig.…”

Section: Resultscontrasting

confidence: 64%

“…In the XPS Pb 4f spectra an additional component, shifted 1 eV towards higher binding energy (BE), was observed. 3,4 It is interesting to note that the corresponding Te 3d peak contained three components, which were attributed to Te 2 , Te 0 , and Te C4 , the content of the second one being minor. The final oxidation products were proposed to be PbO and TeO 2 , as the observed chemical shifts corresponded to those known for bulk oxides.…”

Section: Introductionmentioning

confidence: 98%

“…During the oxidation of pure, Ge-and Sn-doped PbTe(100) the surface is enriched in lead. 4,5 However, there are a lot of questions under discussion. First, it is not clear whether the Pb 4f component shifted to higher binding energies appears due to Pb C4 formation (which is quite difficult to envisage) or it may be attributed to the changes in the Pb atom environment.…”

Section: Introductionmentioning

confidence: 99%

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The oxidation of PbTe(100) surface in dry oxygen

Yashina

Tikhonov

Neudachina

et al. 2004

Surface & Interface Analysis

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Section: Resultscontrasting

confidence: 64%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The oxidation of PbTe(100) surface in dry oxygen

Yashina

Tikhonov

Neudachina

et al. 2004

Surface & Interface Analysis

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“…75 These results suggest that the sample surface is oxidized and forms XPS spectra taken at other spots on the first substrate show similar results ( Figure S5 and Table S1, Supplementary Information). The large deviation of Sn:Te ratio from the nominal value in SnTe was previously observed in undoped SnTe bulk crystals 58 and thin films 57 as well, and is attributed to the different oxidation rates of the two elements.…”

Section: -73supporting

confidence: 57%

“…The former corresponds to a 0 state, 74 and the latter is +4 as in TeO 2 . [57][58][59] In contrast to the EDX characterization which has a lower sensitivity, two prominent In peaks are observed in Figure 5d and the binding energies are 453.7 eV (3d 3/2 ) and 446.0 eV (3d 5/2 ) which correspond to a +3 oxidation state. 75 These results suggest that the sample surface is oxidized and forms XPS spectra taken at other spots on the first substrate show similar results ( Figure S5 and Table S1, Supplementary Information).…”

Section: -73mentioning

confidence: 90%

Surface oxidation and thermoelectric properties of indium-doped tin telluride nanowires

Losovyj

et al. 2017

Nanoscale

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The recent discovery of excellent thermoelectric properties and topological surface states in SnTe-based compounds has attracted extensive attention in various research areas. Indium doped SnTe is of particular interest because, depending on the doping level, it can either generate resonant states in the bulk valence band leading to enhanced thermoelectric properties, or induce superconductivity that coexists with topological states. Here we report on the vapor deposition of In-doped SnTe nanowires and the study of their surface oxidation and thermoelectric properties. The nanowire growth is assisted by Au catalysts, and their morphologies vary as a function of substrate position and temperature. Transmission electron microscopy characterization reveals the formation of amorphous surface in single crystalline nanowires. X-ray photoelectron spectroscopy studies suggest that the nanowire surface is composed of In 2 O 3 , SnO 2 , Te and TeO 2 which can be readily removed by argon ion sputtering. Exposure of the cleaned nanowires to atmosphere yields rapid oxidation of the surface within only one minute. Characterizations of electrical conductivity σ, thermopower S, and thermal conductivity κ were performed on the same In-doped nanowire which shows suppressed σ and κ but enhanced S yielding an improved thermoelectric figure of merit ZT than the undoped SnTe.2

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Characterization of treated pbte surfaces by means of RHEED and RBS

Salewski¹

1983

Cryst. Res. Technol.

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Differently treated PbTe surfaces have been investigated by means of reflection high energy electron diffraction (RHEEl)) and Euthorford backscattering (RBS). It has been shown that chemical lap polishing followed by heat treatment is the best method to fulfil tho requirements of the following epitaxy process concerning the absence of contaminations, the high structural surface perfection, and the flatness of the substrates.Thc influence of heat treatment on structural perfection and chemical composition in the surface region has been investigated to determine the optimal conditions for the tempering step before epitaxy.Untcrschiedlich behandelte PbTe-Oberfliichen wurden mit Hilfe der Zteflexionsbeugung hochenergetischer Elektronen (RHEED) iind der Rutherford-Ruckstrouung (RRS) untersucht. Es wiirde gezcigt, daIj die chemische Wischpolitur, gefolgt von einer Tempcrbehandlung, die gunstigste Methodo z u r Erfiillung der Forderungen des anschliefienden Epitaxieprozesses hinsichtlich der Freiheit von Kontaminationen, der hohen strukturelleri Oberfliichenperfektion und der Substratebenheit darstellt. I)er EinfluB einer Wiirmebehandlnng auf die strukturelle Perfektion und chemischc Zusammensetzung im Oberflachenbercich wurde untersucht, um die optimalen Redingungcn fiir den Temperschritt vor dcr Epitaxie zu bestimmen.

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Oxidation in air and thermal desorption on PbTe, SnTe and Pb0.8Sn0.2Te Surfaces

Cited by 42 publications

References 12 publications

The oxidation of PbTe(100) surface in dry oxygen

The oxidation of PbTe(100) surface in dry oxygen

Surface oxidation and thermoelectric properties of indium-doped tin telluride nanowires

Characterization of treated pbte surfaces by means of RHEED and RBS

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