تقرير
Role of Sb in the superconducting kagome metal CsV$_3$Sb$_5$ revealed by its anisotropic compression
| العنوان: | Role of Sb in the superconducting kagome metal CsV$_3$Sb$_5$ revealed by its anisotropic compression |
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| المؤلفون: | Tsirlin, Alexander A., Fertey, Pierre, Ortiz, Brenden R., Klis, Berina, Merkl, Valentino, Dressel, Martin, Wilson, Stephen D., Uykur, Ece |
| المصدر: | SciPost Phys. 12, 049 (2022) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Pressure evolution of the superconducting kagome metal CsV$_3$Sb$_5$ is studied with single-crystal x-ray diffraction and density-functional band-structure calculations. A highly anisotropic compression observed up to 5 GPa is ascribed to the fast shrinkage of the Cs-Sb distances and suppression of Cs rattling motion. This prevents Sb displacements required to stabilize the three-dimensional charge-density-wave (CDW) order and elucidates the disappearance of the CDW already at 2 GPa despite only minor changes in the electronic structure of the normal state. At higher pressures, vanadium bands still change only marginally, whereas antimony bands undergo a major reconstruction caused by the gradual formation of the interlayer Sb-Sb bonds. Our results exclude pressure tuning of vanadium kagome bands as the main mechanism for the non-trivial evolution of superconductivity in real-world kagome metals. Concurrently, we establish the central role of Sb atoms in the stabilization of a three-dimensional CDW and Fermi surface reconstruction. Comment: published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.21468/SciPostPhys.12.2.049 |
| URL الوصول: | http://arxiv.org/abs/2105.01397 |
| رقم الأكسشن: | edsarx.2105.01397 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.21468/SciPostPhys.12.2.049 |
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