Insensitivity of the Superconducting Gap to Variations in the Critical Temperature of Zn-SubstitutedBi2Sr2CaCu2O8+δSuperconductors
| Autor: | Amit Kanigel, Y. Lubashevsky, Arti Garg, Ming Shi, Yasmine Sassa |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 106 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.106.047002 |
| Popis: | The phase diagram of the superconducting high-${T}_{c}$ cuprates is governed by two energy scales: ${T}^{*}$, the temperature below which a gap is opened in the excitation spectrum, and ${T}_{c}$, the superconducting transition temperature. The way these two energy scales are reflected in the low-temperature energy gap is being intensively debated. Using Zn substitution and carefully controlled annealing we prepared a set of samples having the same ${T}^{*}$ but different ${T}_{c}$'s, and measured their gap using angle-resolved photoemission spectroscopy (ARPES). We show that ${T}_{c}$ is not related to the gap shape or size, but it controls the size of the coherence peak at the gap edge. |
| Databáze: | OpenAIRE |
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