Evolution of the pseudogap and excess conductivity of YBa$_2$Cu$_3$O$_{7-δ}$ single crystals in the course of long-term aging
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866918242309636096 |
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| author | Solovjov, A. L. Bludova, L. V. Shytov, M. V. Kamchatnaya, S. N. Nazyrov, Z. F. Vovk, R. V. |
| author_facet | Solovjov, A. L. Bludova, L. V. Shytov, M. V. Kamchatnaya, S. N. Nazyrov, Z. F. Vovk, R. V. |
| contents | The temperature dependences of both fluctuation conductivity (FLC) $σ^\prime(T)$ and pseudogap (PG) $Δ^*(T)$ derived from measurements of resistivity $ρ(T)$ of an optimally doped YBa$_2$Cu$_3$O$_{7-δ}$ single crystal subjected to long-term storage have been studied. The as-grown sample S1 exhibits characteristics typical of optimally doped YBa$_2$Cu$_3$O$_{7-δ}$ single crystals containing twins and twin boundaries. Analysis of both FLC and PG showed an unexpected improvement in all characteristics of the sample after 6 years of storage (sample S2), indicating that the effect of twin boundaries is somehow limited. After 17 years of storage, all characteristics of the sample changed dramatically, which indicates a strong influence of internal defects formed during the aging process. For the first time, the temperature dependences of both FLC and PG were obtained after 17 years of storage. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09789 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Evolution of the pseudogap and excess conductivity of YBa$_2$Cu$_3$O$_{7-δ}$ single crystals in the course of long-term aging Solovjov, A. L. Bludova, L. V. Shytov, M. V. Kamchatnaya, S. N. Nazyrov, Z. F. Vovk, R. V. Superconductivity The temperature dependences of both fluctuation conductivity (FLC) $σ^\prime(T)$ and pseudogap (PG) $Δ^*(T)$ derived from measurements of resistivity $ρ(T)$ of an optimally doped YBa$_2$Cu$_3$O$_{7-δ}$ single crystal subjected to long-term storage have been studied. The as-grown sample S1 exhibits characteristics typical of optimally doped YBa$_2$Cu$_3$O$_{7-δ}$ single crystals containing twins and twin boundaries. Analysis of both FLC and PG showed an unexpected improvement in all characteristics of the sample after 6 years of storage (sample S2), indicating that the effect of twin boundaries is somehow limited. After 17 years of storage, all characteristics of the sample changed dramatically, which indicates a strong influence of internal defects formed during the aging process. For the first time, the temperature dependences of both FLC and PG were obtained after 17 years of storage. |
| title | Evolution of the pseudogap and excess conductivity of YBa$_2$Cu$_3$O$_{7-δ}$ single crystals in the course of long-term aging |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2512.09789 |