تقرير
Ultrafast time-resolved x-ray scattering reveals diffusive charge order dynamics in La$_{2-x}$Ba$_x$CuO$_4$
| العنوان: | Ultrafast time-resolved x-ray scattering reveals diffusive charge order dynamics in La$_{2-x}$Ba$_x$CuO$_4$ |
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| المؤلفون: | Mitrano, Matteo, Lee, Sangjun, Husain, Ali A., Delacretaz, Luca, Zhu, Minhui, Munoz, Gilberto de la Peña, Sun, Stella, Joe, Young Il, Reid, Alexander H., Wandel, Scott F., Coslovich, Giacomo, Schlotter, William, van Driel, Tim, Schneeloch, John, Gu, Genda D., Hartnoll, Sean, Goldenfeld, Nigel, Abbamonte, Peter |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science, Condensed Matter - Superconductivity |
| الوصف: | Charge order is universal among high-T$_c$ cuprates but its relevance to superconductivity is not established. It is widely believed that, while static order competes with superconductivity, dynamic order may be favorable and even contribute to Cooper pairing. We use time-resolved resonant soft x-ray scattering to study the collective dynamics of the charge order in the prototypical cuprate, La$_{2-x}$Ba$_x$CuO$_4$. We find that, at energy scales $0.4$ meV $ \lesssim \omega \lesssim 2$ meV, the excitations are overdamped and propagate via Brownian-like diffusion. At energy scales below 0.4 meV the charge order exhibits dynamic critical scaling, displaying universal behavior arising from propagation of topological defects. Our study implies that charge order is dynamic, so may participate tangibly in superconductivity. Comment: 31 pages, 4 figures, 8 supplementary figures, revised paragraph formatting |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1808.04847 |
| رقم الأكسشن: | edsarx.1808.04847 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |