Solid State Reactions in the Quasiternary System (Cd, Pb) (S, Te)

Leute, Volkmar; Haarmann, Niklas; Schmidtke, H. M.

doi:10.1524/zpch.1995.190.part_2.253

Cited by 13 publications

(9 citation statements)

References 6 publications

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“…tice-type mismatch results in a large miscibility gap in the phase diagram [6] and leads to a strong phase separation [4,5]. Such a characteristic is similar to that of rs-ErAs/zb-GaAs heteroepitaxy [7].…”

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confidence: 83%

Thermal precipitation of self‐organized PbTe quantum dots in CdTe host matrix

Koike

Itakura

Hotei

et al. 2008

Phys. Status Solidi (c)

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This paper describes a selective growth of PbTe/CdTe quantum wells (QWs) and quantum dots (QDs) in CdTe host matrix by molecular beam epitaxy. These two tellurides possess almost identical lattice constants, but differ fundamentally in their lattice structure. Owing to a strong phase separation by the lattice‐type mismatch, insertion of a PbTe thin layer in CdTe matrix at higher temperatures than 280 °C was resulted in a self‐organized growth of coherent and three‐dimensionally isotropic QDs. The same growth procedure at lower temperatures, on the other hand, yielded a conventional QW structure with sharp heterointerface. This QW structure, however, was found to precipitate well‐ordered QD‐array by a postgrowth annealing, indicating that the QD formation is induced by the minimization of interface energy between the inmiscible two tellurides. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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confidence: 83%

Thermal precipitation of self‐organized PbTe quantum dots in CdTe host matrix

Koike

Itakura

Hotei

et al. 2008

Phys. Status Solidi (c)

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“…Crystals containing PbTe and CdTe, studied for many years, continue to be subjects of active research today. The phase diagram of this system demonstrated strong temperature-dependent CdTe solubility in PbTe. − The low solubility results from the differences in the crystal structure of these compounds. PbTe crystallizes in the fcc rock-salt-type structure (space group Fm 3̅ m ), whereas CdTe crystallizes in the zinc blende-type structure.…”

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confidence: 96%

Nanohardness and Young’s Modulus of Pb_1–xCd_xTe Crystals Grown by the SSVG and MBE Methods

Wołkanowicz,

Adamiak,

Juś

et al. 2023

ACS Omega

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“…Experimental studies of electric, thermoelectric, and thermal properties of this material revealed that, in n-(Pb,Cd)Te samples heavily doped with iodine to an electron concentration of about n ≈ 10 19 cm –3 , ZT approaches 1.2 at T = 720 K. A high-resolution structural analysis of this material showed that it consists of CdTe nanograins embedded in a (Pb,Cd)Te polycrystalline matrix . The spontaneous formation of these CdTe nanoprecipitations is related to the very low solubility of CdTe in PbTe, as discussed below . The relatively high value of the parameter ZT observed in these (Pb,Cd)Te samples is due to their low lattice thermal conductivity related to the presence of the CdTe nanograins.…”

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confidence: 90%

“…We applied a two-stage technological method that involves the molecular beam epitaxy (MBE) growth of a properly designed CdTe/PbTe epitaxial multilayer, followed by a nanostructure-forming in situ high-vacuum annealing procedure. This method exploits the almost complete immiscibility of PbTe and CdTe below a temperature of about 300 °C, which is related to the qualitative differences in chemical bonding and crystal structure of these semiconductor materials. ,− Even though these compounds crystallize in different cubic lattices, they exhibit excellent matching of their lattice parameters: the zinc-blende lattice parameter of CdTe is a 0 = 0.648 nm, whereas the rock-salt lattice parameter of PbTe is a 0 = 0.646 nm. Thus, using this semiconductor heterosystem, it is possible to obtain stress-free thermoelectric devices.…”

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confidence: 99%

Epitaxial Zinc-Blende CdTe Antidots in Rock-Salt PbTe Semiconductor Thermoelectric Matrix

Szot

Dybko

Dziawa

et al. 2011

Crystal Growth & Design

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The formation of zinc-blende CdTe antidots (bandgap of 1.5 eV at room temperature) embedded in a rock-salt PbTe semiconductor matrix with a narrow bandgap of 0.3 eV in properly annealed epitaxial CdTe/PbTe multilayers grown by molecular beam epitaxy on a GaAs(001) substrate is reported. Transmission microscopy and X-ray diffraction characterization revealed the monocrystalline zinc-blende crystal structure of the CdTe antidots. The CdTe antidots have a highly symmetric shape and size varying in a controlled way in the range from 5 to 30 nm, depending on the layer thicknesses in the initial multilayer CdTe/PbTe stack. The presented results indicate that the CdTe antidot growth mechanism is similar to that of PbTe dots embedded in a CdTe matrix and is driven by the nanoscale phase separation due to qualitative differences in the chemical bonding and crystal structure of PbTe and CdTe. The electrical characterization in terms of Hall effect, electrical conductivity, and Seebeck effect measurements showed that both n- and p-type conductivities can be obtained in these nanocomposite thermoelectric materials with carrier concentrations of 1017–1018 cm–3 and mobilities of about 200 cm2/(V s) at room temperature. About a 25% increase of the thermoelectric power as compared to that of the reference bulk thermoelectric PbTe crystals was found in heterostructures with the smallest CdTe antidots.

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Solid State Reactions in the Quasiternary System (Cd, Pb) (S, Te)

Cited by 13 publications

References 6 publications

Thermal precipitation of self‐organized PbTe quantum dots in CdTe host matrix

Thermal precipitation of self‐organized PbTe quantum dots in CdTe host matrix

Nanohardness and Young’s Modulus of Pb_1–xCd_xTe Crystals Grown by the SSVG and MBE Methods

Epitaxial Zinc-Blende CdTe Antidots in Rock-Salt PbTe Semiconductor Thermoelectric Matrix

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Solid State Reactions in the Quasiternary System (Cd, Pb) (S, Te)

Cited by 13 publications

References 6 publications

Thermal precipitation of self‐organized PbTe quantum dots in CdTe host matrix

Thermal precipitation of self‐organized PbTe quantum dots in CdTe host matrix

Nanohardness and Young’s Modulus of Pb1–xCdxTe Crystals Grown by the SSVG and MBE Methods

Epitaxial Zinc-Blende CdTe Antidots in Rock-Salt PbTe Semiconductor Thermoelectric Matrix

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Nanohardness and Young’s Modulus of Pb_1–xCd_xTe Crystals Grown by the SSVG and MBE Methods