Evolution of the structural transition in Mo1−xWxTe2
| العنوان: | Evolution of the structural transition in Mo1−xWxTe2 |
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| المؤلفون: | Despina Louca, Yu Tao, Jaime A. Fernandez-Baca, Chunruo Duan, Adam A. Aczel, Guangyong Xu, John A. Schneeloch, Jörg Neuefeind, Junjie Yang, Masaaki Matsuda |
| المصدر: | Physical Review B. 102 |
| بيانات النشر: | American Physical Society (APS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Composition dependence, Anharmonicity, Weyl semimetal, 02 engineering and technology, Neutron scattering, 021001 nanoscience & nanotechnology, 01 natural sciences, Crystallography, 0103 physical sciences, Orthorhombic crystal system, Structural transition, 010306 general physics, 0210 nano-technology, Monoclinic crystal system |
| الوصف: | The composition dependence of the structural transition between the monoclinic $1{T}^{\ensuremath{'}}$ and orthorhombic ${T}_{d}$ phases in the ${\mathrm{Mo}}_{1\ensuremath{-}x}{\mathrm{W}}_{x}{\mathrm{Te}}_{2}$ Weyl semimetal was investigated by elastic neutron scattering on single crystals up to $x\ensuremath{\approx}0.54$. First observed in ${\mathrm{MoTe}}_{2}$, the transition from ${T}_{d}$ to $1{T}^{\ensuremath{'}}$ is accompanied by an intermediate pseudo-orthorhombic phase, ${T}_{d}^{*}$. Upon doping with W, the ${T}_{d}^{*}$ phase vanishes by $x\ensuremath{\approx}0.34$. Above this concentration, a phase coexistence behavior with both ${T}_{d}$ and $1{T}^{\ensuremath{'}}$ is observed instead. The interlayer in-plane positioning parameter $\ensuremath{\delta}$, which relates to the $1{T}^{\ensuremath{'}}\phantom{\rule{4pt}{0ex}}\ensuremath{\beta}$ angle, decreases with temperature as well as with W substitution, likely due to strong anharmonicity in the interlayer interactions. The temperature width of the phase coexistence remains almost constant up to $x\ensuremath{\approx}0.54$, in contrast to the broadening reported under pressure. |
| تدمد: | 2469-9969 2469-9950 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::c6378ffc9f09df1188b77c9446f0f972 https://doi.org/10.1103/physrevb.102.054105 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........c6378ffc9f09df1188b77c9446f0f972 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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