The strange metal Hall effect connects quantum criticality and superconductivity in an iron-based superconductor
| Autor: | Hayes, Ian M., Maksimovic, Nikola, Chan, Mun K., Lopez, Gilbert N., Ramshaw, B. J., McDonald, Ross D., Analytis, James G. |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Nature Physics volume 17, pages 58 - 62 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41567-020-0982-x |
| Popis: | Many unconventional superconductors exhibit a common set of anomalous charge transport properties that characterize them as `strange metals', which provides hope that there is single theory that describes them. However, model-independent connections between the strange metal and superconductivity have remained elusive. In this letter, we show that the Hall effect of the unconventional superconductor BaFe$_2$(As$_{1-x}$P$_x$)$_2$ contains an anomalous contribution arising from the correlations within the strange metal. This term has a distinctive dependence on magnetic field, which allows us to track its behavior across the doping-temperature phase diagram, even under the superconducting dome. These measurements demonstrate that the strange metal Hall component emanates from a quantum critical point and, in the zero temperature limit, decays in proportion to the superconducting critical temperature. This creates a clear and novel connection between quantum criticality and superconductivity, and suggests that similar connections exist in other strange metal superconductors. Comment: 11 pages, 3 Figures, Supplementary Information on request |
| Databáze: | arXiv |
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