Hall anomaly in the mixed state of type-II superconductors: Evidence for vacancies within vortex lattice domains
Ruonan Guo, Yong-Cong Chen, Da Jiang, Ping Ao
DOI 10.1103/c33d-dy66 · Physical Review B
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Abstract
Despite numerous recent studies on the Hall anomaly following the discovery of cuprate superconductivity, its origin remains contentious. We demonstrate—without invoking adjustable parameters—that a previously proposed mechanism, in which vacancies form within vortex lattice domains, provides a compelling explanation for the observations in Bi2Sr2CaCu2Ox thin films reported by Nitzav and Kanigel [Phys. Rev. B 107, 094516 (2023)]. In particular, the observed power-law behavior of ρxy vs ρxx, with or without sign reversal, is consistent with the picture of vacancies on domains. Moreover, the effective vortex line length remains 1.5 unit cells (UC) across different experiments, independent of film thickness.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 77 | Pressure not reported | unknown |
| Bi2Sr2CaCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81.1 | Pressure not reported | unknown |
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