Pressure-induced phase transition and superconductivity in YBa2Cu4O8
文献类型：期刊论文
| 作者 | Souliou, SM ; Subedi, A ; Song, YT ; Lin, CT ; Syassen, K ; Keimer, B ; Le Tacon, M |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2014 |
| 卷号 | 90期号:14 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Souliou, SM (reprint author), Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany. |
| 中文摘要 | We investigate the pressure and temperature dependence of the lattice dynamics of the underdoped, stoichiometric, high-temperature superconductor YBa2Cu4O8 by means of Raman spectroscopy and ab initio calculations. This system undergoes a reversible pressure-induced structural phase transition around 10 GPa to a collapsed orthorhombic structure that is well reproduced by the calculation. The coupling of the B-1g-like buckling phonon mode to the electronic continuum is used to probe superconductivity. In the lowpressure phase, self-energy effects through the superconducting transition renormalize this phonon, and the amplitude of this renormalization strongly increases with pressure. Whereas our calculation indicates that this mode's coupling to the electronic system is only marginally affected by the structural phase transition, the aforementioned renormalization is completely suppressed in the high pressure phase, demonstrating that under hydrostatic pressures higher than 10 GPa, superconductivity in YBa2Cu4O8 is greatly weakened or obliterated. |
| 资助信息 | Swiss National Supercomputing Centre (CSCS) [ID s404]; European Commission [226716]; European project SOPRANO under Marie Curie actions [PITNGA-2008-214040] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59506]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Souliou, SM,Subedi, A,Song, YT,et al. Pressure-induced phase transition and superconductivity in YBa2Cu4O8[J]. PHYSICAL REVIEW B,2014,90(14). |
| APA | Souliou, SM.,Subedi, A.,Song, YT.,Lin, CT.,Syassen, K.,...&Le Tacon, M.(2014).Pressure-induced phase transition and superconductivity in YBa2Cu4O8.PHYSICAL REVIEW B,90(14). |
| MLA | Souliou, SM,et al."Pressure-induced phase transition and superconductivity in YBa2Cu4O8".PHYSICAL REVIEW B 90.14(2014). |
入库方式： OAI收割
来源：物理研究所
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