| Autor: |
Ramshaw, BJ, Sebastian, SE, McDonald, RD, Day, James, Tan, BS, Zhu, Z, Betts, JB, Liang, Ruixing, Bonn, DA, Hardy, WN, Harrison, N |
| Přispěvatelé: |
Sebastian, Suchitra [0000-0002-1386-8138], Apollo - University of Cambridge Repository |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
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| Popis: |
In the quest for superconductors with higher transition temperatures (T(c)), one emerging motif is that electronic interactions favorable for superconductivity can be enhanced by fluctuations of a broken-symmetry phase. Recent experiments have suggested the existence of the requisite broken-symmetry phase in the high-T(c) cuprates, but the impact of such a phase on the ground-state electronic interactions has remained unclear. We used magnetic fields exceeding 90 tesla to access the underlying metallic state of the cuprate YBa2Cu3O(6+δ) over a wide range of doping, and observed magnetic quantum oscillations that reveal a strong enhancement of the quasiparticle effective mass toward optimal doping. This mass enhancement results from increasing electronic interactions approaching optimal doping, and suggests a quantum critical point at a hole doping of p(crit) ≈ 0.18. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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