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Pb₀.₆₀Sn₀.₄₀Te
Pb₀.₆₀Sn₀.₄₀Te is a topological crystalline insulator (TCI) that bridges ferroelectricity and quantum topology. Grown using the Slow Cooling technique, our high-purity single crystals exhibit excellent structural quality and reproducible transport properties.
Key Features:
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Crystal Structure: Rock-salt (Fm-3m) with low-T ferroelectric distortion
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Topological Nature: Nontrivial band inversion with two Fermi pockets
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Verified by: Nernst effect, SdH oscillations, Raman & synchrotron XRD
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Electrical Type: p-type semiconductor
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Applications: Quantum transport, thermoelectrics, and spintronics
Typical Size: 5–10 mm
Orientation: (100)/(111) upon request
Purity: 5N elemental precursors
Send us a message to get price quote :contact@xtalsphere.com
Pb₀.₆₀Sn₀.₄₀Te Single Crystal
Overview
Pb₀.₆₀Sn₀.₄₀Te is a topological crystalline insulator (TCI) derived from the PbTe–SnTe solid solution series, renowned for its exceptional thermoelectric performance, ferroelectric distortion, and topologically nontrivial electronic states.
At Xtalsphere, we synthesize high-quality, stoichiometrically controlled single crystals of Pb₀.₆₀Sn₀.₄₀Te using the slow cooling technique, ensuring high purity, structural perfection, and reproducible carrier properties.
Scientific Background
Pb₁₋ₓSnₓTe compounds occupy a unique position at the intersection of thermoelectricity and topological quantum materials. Around x ≈ 0.4, the system undergoes a topological phase transition from a trivial semiconductor (PbTe) to a topological crystalline insulator (SnTe-type) phase.
Our recent study demonstrates — through Nernst effect measurements — the presence of ferroelectric distortion in Pb₀.₆₀Sn₀.₄₀Te. This distortion, confirmed via quantum oscillations, Raman spectroscopy, and synchrotron X-ray analysis, reveals the coupling between ferroelectricity and topological band inversion, offering a new platform for studying quantum ferroelectric states.
Growth Technique
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Atmosphere: High vacuum-sealed quartz ampoule
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Starting Materials: 99.999% pure Pb, Sn, and Te precursors
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Temperature Profile: Slow cooling to ensure large grain growth and minimal defects
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Crystallinity: Verified by powder and Laue X-ray diffraction
Characterization & Properties
| Property | Details |
|---|---|
| Crystal Structure | Rock-salt (Fm-3m) with slight ferroelectric distortion at low T |
| Composition (EDS) | Pb₀.₆₀Sn₀.₄₀Te ± 0.01 |
| Band Type | Narrow-gap semiconductor with inverted band ordering |
| Topological Nature | Topological Crystalline Insulator (TCI) |
| Electrical Behavior | p-type semiconducting |
| Notable Features | Shubnikov–de Haas oscillations from two nontrivial Fermi pockets |
| Phase Transition | Structural distortion below ~50 K confirmed by Raman & PDF analysis |
| Applications | Quantum transport studies, Nernst effect, thermoelectrics, spintronics |
Research Significance
“The transverse thermoelectric (Nernst) effect provides direct evidence of ferroelectric distortion in the TCI Pb₀.₆₀Sn₀.₄₀Te, linking lattice distortion with topological electronic states. This compound serves as a key model for exploring the interplay between ferroelectricity and topological quantum phases.”
Applications
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Quantum transport and Hall/Nernst measurements
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Studies of topological phase transitions
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Low-temperature ferroelectric characterization
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Thermoelectric and spintronic device prototyping
Crystal Specifications (Typical)
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Form: Shiny cleavable single crystal or wafer
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Typical Dimensions: 5–10 mm
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Orientation: (100) or (111), as requested
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Purity: > 99.999% (5N) elements
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Customization: Compositional tuning (0 ≤ x ≤ 1) available on request
Ordering Information
Available for academic and industrial research use.
For custom compositions or oriented wafers, contact us at:
contact@xtalsphere.com | 🌐 www.xtalsphere.com
Send us a message to get price quote: contact@xtalsphere.com
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