Structural phase transitions of tellurium nanoplates under pressure

Li, Chao; Bukhtiar, Arfan; Shen, Xi; Wang, Weipeng; Zhao, Hai-Ming; Yao, Yuan; Zou, Bing-Song; Li, Yanchun; Li, Xiaodong; Liu, Jing; Jin, Changqing; Yu, Rici

doi:10.1088/1674-1056/24/3/036401

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…This causes further potential structural transitions to occur, which can induce changes in the properties or lattice behavior of the material. [18][19][20][21] In the case of Y 2 O 3 (Eu 3+ ) nanomaterial, pressure-induced microstructural deformation ahead of the lattice amorphous transition results in completely distinct microstructural states for doping Eu 3+ ions. [22] This clearly results in a change in crystal environment, which subsequently changes the local environment of Eu 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Local microstructural analysis for Y ₂ O ₃ /Eu ³⁺ /Mg ²⁺ nanorods by Raman and photoluminescence spectra under high pressure

Wang

Liu

et al. 2017

Chinese Phys. B

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In this paper, we investigate the Raman and photoluminescence spectra of Y 2 O 3 /Eu 3+ and Y 2 O 3 /Eu 3+ /Mg 2+ nanorods under high pressures using 514-nm and 532-nm laser light excitation. We observe transitions from the initial cubic phase to amorphous at pressures higher than 24 GPa for both Y 2 O 3 /Eu 3+ and Y 2 O 3 /Eu 3+ /Mg 2+ nanorods. In addition, Y 2 O 3 /Eu 3+ and Y 2 O 3 /Eu 3+ /Mg 2+ nanorods exhibit different distorted states after the pressure has been raised to 8 GPa. The analyses of intensity ratios, I 0−2 /I 0−1 from 5 D 0 -7 F 2 to 5 D 0 -7 F 1 and I 0−2 A/B of 5 D 0 -7 F 2 transitions indicate that Y 2 O 3 /Eu 3+ /Mg 2+ nanorods exhibit stronger local micro-surrounding characteristics for Eu 3+ ions in a pressuremodulated crystal field. The doped Mg 2+ ion results in reducing the crystal ionicity in the distorted lattice state under high pressures. The use of doped ions as an ion modifier can be applied to the study of small local microstructural changes through Eu 3+ luminescence.

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Section: Introductionmentioning

confidence: 99%

Local microstructural analysis for Y ₂ O ₃ /Eu ³⁺ /Mg ²⁺ nanorods by Raman and photoluminescence spectra under high pressure

Wang

Liu

et al. 2017

Chinese Phys. B

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Transport properties and electronic phase transitions in two-dimensional tellurium at high pressure

Zou,

Wang,

Wang

et al. 2024

Applied Physics Letters

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Utilizing in situ Raman spectroscopy, resistivity, and Hall-effect measurements, we conducted an extensive investigation on the continuous electronic phase transitions and transport properties of two-dimensional (2D) tellurium (Te) under high pressure at room and low temperature (80–300 K). The distinguishable decrease in the A1 Raman mode's full width at half maximum in the trigonal phase (Te-I) indicated an electronic phase transition at 2.2 GPa. The following Hall-effect experiments located the Lifshitz transition and the semiconductor-semimetal transition at 0.9 and 1.9 GPa, respectively, and the semiconductor-semimetal transition was also confirmed by resistivity variation through temperature. The charge carrier types of the Te changed from hole to electron during the phase transition from Te-I to Te-II (triclinic phase) at low temperature, while the transport parameters remained almost unchanged during the phase transition from Te-II to Te-III (monoclinic phase). The results offered complete and thorough electronic phase transitions and transport characteristics of 2D Te, hence great advancing the potential application of Te in electronic devices.

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Two ultra-stable novel allotropes of tellurium few-layers*

et al. 2020

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At least four two- or quasi-one-dimensional allotropes and a mixture of them were theoretically predicted or experimentally observed for low-dimensional Te, namely the α, β, γ, δ, and chiral-α + δ phases. Among them the γ and α phases were found to be the most stable phases for monolayer and thicker layers, respectively. Here, we found two novel low-dimensional phases, namely the ε and ζ phases. The ζ phase is over 29 meV/Te more stable than the most stable monolayer γ phase, and the ε phase shows comparable stability with the most stable monolayer γ phase. The energetic difference between the ζ and α phases reduces with respect to the increased layer thickness and vanishes at the four-layer (12-sublayer) thickness, while this thickness increases under change doping. Both ε and ζ phases are metallic chains and layers, respectively. The ζ phase, with very strong interlayer coupling, shows quantum well states in its layer-dependent bandstructures. These results provide significantly insight into the understanding of polytypism in Te few-layers and may boost tremendous studies on properties of various few-layer phases.

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Structural phase transitions of tellurium nanoplates under pressure

Abstract: Structural phase transitions of tellurium nanoplates under pressure View the table of contents for this issue, or go to the journal homepage for more 2015 Chinese Phys. B 24 036401

Cited by 3 publications

References 26 publications

Local microstructural analysis for Y ₂ O ₃ /Eu ³⁺ /Mg ²⁺ nanorods by Raman and photoluminescence spectra under high pressure

Local microstructural analysis for Y ₂ O ₃ /Eu ³⁺ /Mg ²⁺ nanorods by Raman and photoluminescence spectra under high pressure

Transport properties and electronic phase transitions in two-dimensional tellurium at high pressure

Two ultra-stable novel allotropes of tellurium few-layers*

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Structural phase transitions of tellurium nanoplates under pressure

Abstract: Structural phase transitions of tellurium nanoplates under pressure View the table of contents for this issue, or go to the journal homepage for more 2015 Chinese Phys. B 24 036401

Cited by 3 publications

References 26 publications

Local microstructural analysis for Y 2 O 3 /Eu 3+ /Mg 2+ nanorods by Raman and photoluminescence spectra under high pressure

Local microstructural analysis for Y 2 O 3 /Eu 3+ /Mg 2+ nanorods by Raman and photoluminescence spectra under high pressure

Transport properties and electronic phase transitions in two-dimensional tellurium at high pressure

Two ultra-stable novel allotropes of tellurium few-layers*

Contact Info

Product

Resources

About

Local microstructural analysis for Y ₂ O ₃ /Eu ³⁺ /Mg ²⁺ nanorods by Raman and photoluminescence spectra under high pressure

Local microstructural analysis for Y ₂ O ₃ /Eu ³⁺ /Mg ²⁺ nanorods by Raman and photoluminescence spectra under high pressure