Laser-Induced Charge-Density-Wave Transient Depinning in Chromium
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2016
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| _version_ | 1866910774201417728 |
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| author | Jacques, V. Laulhé, C. Moisan, N. Ravv, S. Bolloc'h, D. Le |
| author_facet | Jacques, V. Laulhé, C. Moisan, N. Ravv, S. Bolloc'h, D. Le |
| contents | We report here on time-resolved x-ray diffraction measurements following femtosecond laser excitation in pure bulk chromium. Comparing the evolution of incommensurate charge-density-wave (CDW) and atomic lattice reflections, we show that, few nanoseconds after laser excitation, the CDW undergoes different structural changes than the atomic lattice. We give evidence for a transient CDW shear strain that breaks the lattice point symmetry. This strain is characteristic of sliding CDWs, as observed in other incommensurate CDW systems, suggesting the laser-induced CDW sliding capability in 3D systems. This first evidence opens perspectives for unconventional laser-assisted transport of correlated charges. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1612_05068 |
| institution | arXiv |
| publishDate | 2016 |
| record_format | arxiv |
| spellingShingle | Laser-Induced Charge-Density-Wave Transient Depinning in Chromium Jacques, V. Laulhé, C. Moisan, N. Ravv, S. Bolloc'h, D. Le Strongly Correlated Electrons We report here on time-resolved x-ray diffraction measurements following femtosecond laser excitation in pure bulk chromium. Comparing the evolution of incommensurate charge-density-wave (CDW) and atomic lattice reflections, we show that, few nanoseconds after laser excitation, the CDW undergoes different structural changes than the atomic lattice. We give evidence for a transient CDW shear strain that breaks the lattice point symmetry. This strain is characteristic of sliding CDWs, as observed in other incommensurate CDW systems, suggesting the laser-induced CDW sliding capability in 3D systems. This first evidence opens perspectives for unconventional laser-assisted transport of correlated charges. |
| title | Laser-Induced Charge-Density-Wave Transient Depinning in Chromium |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/1612.05068 |