SnTe Phase Transition in Strained Superlattices PbTe/SnTe

Mironov, O. A.; Makarovskii, O. N.; Nashchekina, O. N.; Shpakovskaya, L. P.; Litvinov, V. I.; Oszwałdowski, M.; Berus, T.

doi:10.12693/aphyspola.88.853

Cited by 2 publications

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“…Many authors have studied the electrical properties of PbTe/SnTe superlattices ͑SLs͒ grown on BaF 2 ͑111͒ and KCl ͑001͒ substrates in the last ten years. [1][2][3] Murase et al 1 have observed a superconducting transition at temperatures varying from 1.5 to 7 K, depending on PbTe layer thickness and sample substrate, and suggested that the phenomena are related with the presence of metal microprecipitates in the samples. Mironov et al 3 have explained the anomalous behavior of the conductivity in their samples by a structural phase transition undergone by the SnTe layer.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Murase et al 1 have observed a superconducting transition at temperatures varying from 1.5 to 7 K, depending on PbTe layer thickness and sample substrate, and suggested that the phenomena are related with the presence of metal microprecipitates in the samples. Mironov et al 3 have explained the anomalous behavior of the conductivity in their samples by a structural phase transition undergone by the SnTe layer. Litvinov et al 4 have used the presence of two-dimensional interface states to explain the magnetic field dependence of Hall coefficient of short-period SLs.…”

Section: Introductionmentioning

confidence: 99%

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Reciprocal space maps of PbTe/SnTe superlattices

Ferreira

Abramof

Rappl

et al. 1998

Journal of Applied Physics

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PbTe/SnTe superlattices were grown on ͑111͒ BaF 2 substrates by molecular beam epitaxy using PbTe as buffer layers. The individual layer thickness and number of repetitions were chosen in order to change the strain profile in the superlattices from completely pseudomorphic to partially relaxed. The superlattices structural properties were investigated by making reciprocal space maps around the asymmetric ͑224͒ Bragg diffraction points and /2⌰ scans for the ͑222͒ diffraction with a high resolution diffractometer in the triple axis configuration. With the strain information obtained from the maps, the ͑222͒ /2⌰ scan was simulated by dynamical diffraction theory. The simulated spectra of the pseudomorphic superlattices, in which the in-plane lattice constant is assumed to be the same as the PbTe buffer throughout the superlattice, fitted in a remarkably good agreement with the measured data, indicating that almost structurally perfect samples were obtained. For the thicker superlattices, the ͑224͒ reciprocal space maps revealed a complex strain profile. Our results show the importance of detailed structural characterization on the interpretation of the electrical properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reciprocal space maps of PbTe/SnTe superlattices

Ferreira

Abramof

Rappl

et al. 1998

Journal of Applied Physics

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X-ray Characterization of PbTe/SnTe Superlattices

et al. 1997

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PbTe/SnTe superlattices have been proposed many years ago for use as base material for infrared detectors. However, many difficulties have prevented its use, mainly the ones related to obtaining low concentration SnTe. Recently we have shown that SnTe layers with relatively low hole concentration can be grown by molecular beam epitaxy at low temperature using stoichiometric charges. In this work we investigate the structural properties of PbTe/SnTe superlattices grown by molecular beam epitaxy on (111) BaF2 substrates. Sample characterization has been done by high resolution x-ray diffraction. Information on strain was obtained from reciprocal space maps of asymmetric Bragg reflections and used as input parameters for dynamical simulation of the diffraction spectra.

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SnTe Phase Transition in Strained Superlattices PbTe/SnTe

Cited by 2 publications

References 5 publications

Reciprocal space maps of PbTe/SnTe superlattices

Reciprocal space maps of PbTe/SnTe superlattices

X-ray Characterization of PbTe/SnTe Superlattices

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