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Role of bosonic modes in the mechanism of high temperature Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ superconductors using ultrafast optical techniques
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhu, Jian-Xin Chia, Elbert E. M. Tamegai, Tsuyoshi Eisaki, Hiroshi Oh, Kyu-Hwan Taylor, Antoinette J. |
| Copyright Year | 2008 |
| Abstract | Using ultrafast optical techniques, we probe the hole-doping dependence of the electron-boson coupling constant $\lambda$ in Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$. In the overdoped region, we observe a correlation between ($\lambda$) and the superconducting transition temperature $T_{c}$. Upon performing the McMillan analysis, however, we find that $\lambda$ is too small to explain the high $T_{c}$'s, and that the Coulomb pseudopotential $\mu^{\ast}$ is negative. Our analysis therefore reveals two components in the mechanism of high-$T_{c}$ superconductivity -- a dominant pre-existing pairing interaction, together with a weaker electron-phonon interaction that fine-tunes $T_{c}$. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://arxiv.org/pdf/0806.2664v1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
