Shallow core levels, or how to determine the doping and $T_c$ of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ and Bi$_{2}$Sr$_2$CuO$_{6+δ}$ without cooling
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909223867121664 |
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| author | Valla, Tonica Kundu, Asish K. Pervan, Petar Pletikosić, Ivo Drozdov, Ilya K. Wu, Zebin Gu, Genda D. |
| author_facet | Valla, Tonica Kundu, Asish K. Pervan, Petar Pletikosić, Ivo Drozdov, Ilya K. Wu, Zebin Gu, Genda D. |
| contents | Determining the doping level in high-temperature cuprate superconductors is crucial for understanding the origin of superconductivity in these materials and for unlocking their full potential. However, accurately determining the doping level remains a significant challenge due to a complex interplay of factors and limitations in various measurement techniques. In particular, in Bi$_{2}$Sr$_2$CuO$_{6+δ}$ and Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$, where the mobile carriers are introduced by non-stoichiometric oxygen $δ$, the determination has been extremely problematic. Here, we study the doping dependence of the electronic structure of these materials in angle-resolved photoemission and find that both the doping level, $p$, and the superconducting transition temeprature, $T_c$ can be precisely determined from the binding energy of the Bi $5d$ core-levels. The measurements can be performed at room temperature, enabling the determination of $p$ and $T_c$ without cooling the samples. This should be very helpful for further studies of these materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_18519 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Shallow core levels, or how to determine the doping and $T_c$ of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ and Bi$_{2}$Sr$_2$CuO$_{6+δ}$ without cooling Valla, Tonica Kundu, Asish K. Pervan, Petar Pletikosić, Ivo Drozdov, Ilya K. Wu, Zebin Gu, Genda D. Superconductivity Strongly Correlated Electrons Determining the doping level in high-temperature cuprate superconductors is crucial for understanding the origin of superconductivity in these materials and for unlocking their full potential. However, accurately determining the doping level remains a significant challenge due to a complex interplay of factors and limitations in various measurement techniques. In particular, in Bi$_{2}$Sr$_2$CuO$_{6+δ}$ and Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$, where the mobile carriers are introduced by non-stoichiometric oxygen $δ$, the determination has been extremely problematic. Here, we study the doping dependence of the electronic structure of these materials in angle-resolved photoemission and find that both the doping level, $p$, and the superconducting transition temeprature, $T_c$ can be precisely determined from the binding energy of the Bi $5d$ core-levels. The measurements can be performed at room temperature, enabling the determination of $p$ and $T_c$ without cooling the samples. This should be very helpful for further studies of these materials. |
| title | Shallow core levels, or how to determine the doping and $T_c$ of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ and Bi$_{2}$Sr$_2$CuO$_{6+δ}$ without cooling |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2405.18519 |