Second Dome of Superconductivity in YBa$_2$Cu$_3$O$_7$ at High Pressure
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866913725869457408 |
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| author | Nokelainen, Johannes Matzelle, Matthew E. Lane, Christopher Atlam, Nabil Zhang, Ruiqi Markiewicz, Robert S. Barbiellini, Bernardo Sun, Jianwei Bansil, Arun |
| author_facet | Nokelainen, Johannes Matzelle, Matthew E. Lane, Christopher Atlam, Nabil Zhang, Ruiqi Markiewicz, Robert S. Barbiellini, Bernardo Sun, Jianwei Bansil, Arun |
| contents | Evidence is growing that a second dome of high-$T_\mathrm{c}$ superconductivity can be accessed in the cuprates by increasing the doping beyond the first dome. Here we use \emph{ab initio} methods without invoking any free parameters, such as the Hubbard $U$, to reveal that pressure could turn YBa$_2$Cu$_3$O$_7$ into an ideal candidate for second-dome-superconductivity, displaying the predicted signature of strongly hybridized $d_{x^2-y^2}$ and $d_{z^2}$ orbitals. Notably, pressure is found to induce a phase transition replacing the antiferromagnetic phases with an orbitally-degenerate $d$--$d$ phase. Our study suggests that the origin of the second dome is correlated with the oxygen-hole fraction in the CuO$_2$ planes and the collapse of the pseudogap phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_05715 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Second Dome of Superconductivity in YBa$_2$Cu$_3$O$_7$ at High Pressure Nokelainen, Johannes Matzelle, Matthew E. Lane, Christopher Atlam, Nabil Zhang, Ruiqi Markiewicz, Robert S. Barbiellini, Bernardo Sun, Jianwei Bansil, Arun Superconductivity Evidence is growing that a second dome of high-$T_\mathrm{c}$ superconductivity can be accessed in the cuprates by increasing the doping beyond the first dome. Here we use \emph{ab initio} methods without invoking any free parameters, such as the Hubbard $U$, to reveal that pressure could turn YBa$_2$Cu$_3$O$_7$ into an ideal candidate for second-dome-superconductivity, displaying the predicted signature of strongly hybridized $d_{x^2-y^2}$ and $d_{z^2}$ orbitals. Notably, pressure is found to induce a phase transition replacing the antiferromagnetic phases with an orbitally-degenerate $d$--$d$ phase. Our study suggests that the origin of the second dome is correlated with the oxygen-hole fraction in the CuO$_2$ planes and the collapse of the pseudogap phase. |
| title | Second Dome of Superconductivity in YBa$_2$Cu$_3$O$_7$ at High Pressure |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2305.05715 |