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Calculated effects of disorder on the Mo core levels in purple bronze Li$_2$Mo$_{12}$O$_{34}$
Materials Science · Submitted 30 Jan 2018
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim It is shown that thermal disorder and zero-point motion lead to substantial core level broadening, and the broadening at room temperature is predicted to be sufficiently larger than at zero degrees to allow for a detection by XPS measurements.
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The abstract, sentence by sentence
The band structures of ordered and thermally disordered Li$_2$Mo$_{12}$O$_{34}$ are calculated by use of ab-initio DFT-LMTO method with focus on the behavior of the Mo 3d-core levels. It is shown that thermal disorder and zero-point motion lead to substantial core level broadening, and the broadening at room temperature is predicted to be sufficiently larger than at zero degrees to allow for a detection by XPS measurements. However, real purple bronze has 10 percent of Li vacancies and static disorder will attenuate the $T$-dependent broadening. It is argued that core level spectroscopies could be a useful tool for measuring of thermal disorders in many materials, especially for those with minor static disorder. Studies of core levels in magnetic materials will be helpful for an understanding of $T$-dependent spin moments.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The band structures of ordered and thermally disordered Li$_2$Mo$_{12}$O$_{34}$ are calculated by use of ab-initio DFT-LMTO method with focus on the behavior of the Mo 3d-core levels. | method 0.65 | 0.93 | 0.05 | asserted 0.98 |
| s1 | It is shown that thermal disorder and zero-point motion lead to substantial core level broadening, and the broadening at room temperature is predicted to be sufficiently larger than at zero degrees to allow for a detection by XPS measurements. | result 1.00 | 0.87 | 0.62 | asserted 0.96 |
| s2 | However, real purple bronze has 10 percent of Li vacancies and static disorder will attenuate the $T$-dependent broadening. | limitation 0.81 | 0.32 | 0.11 | asserted 1.00 |
| s3 | It is argued that core level spectroscopies could be a useful tool for measuring of thermal disorders in many materials, especially for those with minor static disorder. | interpretation 0.84 | 0.22 | 0.48 | hedged possibility 1.00 |
| s4 | Studies of core levels in magnetic materials will be helpful for an understanding of $T$-dependent spin moments. | future work 0.86 | 0.07 | 0.06 | hedged possibility 0.89 |
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The paper
Original abstract
The band structures of ordered and thermally disordered Li$_2$Mo$_{12}$O$_{34}$ are calculated by use of ab-initio DFT-LMTO method with focus on the behavior of the Mo 3d-core levels. It is shown that thermal disorder and zero-point motion lead to substantial core level broadening, and the broadening at room temperature is predicted to be sufficiently larger than at zero degrees to allow for a detection by XPS measurements. However, real purple bronze has 10 percent of Li vacancies and static disorder will attenuate the $T$-dependent broadening. It is argued that core level spectroscopies could be a useful tool for measuring of thermal disorders in many materials, especially for those with minor static disorder. Studies of core levels in magnetic materials will be helpful for an understanding of $T$-dependent spin moments.
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