| Autor: |
Rui, Zhou, Michihiro, Hirata, Tao, Wu, Igor, Vinograd, Hadrien, Mayaffre, Steffen, Krämer, Arneil P, Reyes, Philip L, Kuhns, Ruixing, Liang, W N, Hardy, D A, Bonn, Marc-Henri, Julien |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America. 114(50) |
| ISSN: |
1091-6490 |
| Popis: |
The upper critical field Hc2 is a fundamental, and technologically important, property that measures the ability of a superconductor to withstand magnetic fields. Recently, there has been a controversy regarding the values Hc2 in high-Tc copper oxides, particularly in YBa2Cu3Oy when a charge density wave (CDW) is present. Here, taking advantage of nuclear magnetic resonance, a local probe that can measure the intrinsic spin susceptibility χspin of the superconducting planes, we observe an essentially linear increase in χspin up to a point in the range of 20–40 T, followed by a constant value. This saturation point is in accord with previous measurements of Hc2. Our data suggest that the CDW drastically reduces Hc2 in YBa2Cu3Oy. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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