Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.047002
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Funding
- Israeli Science Foundation
- NSF [DMR-0084402]
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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.
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