TY - JOUR
T1 - Insensitivity of the superconducting gap to variations in the critical temperature of Zn-substituted Bi2Sr2CaCu2O 8+δ superconductors
AU - Lubashevsky, Y.
AU - Garg, A.
AU - Sassa, Y.
AU - Shi, M.
AU - Kanigel, Amit
N1 - Funding Information: We are grateful to M. Randeria, A. Balatsky, and U. Chatterjee for helpful discussions and to G. Koren for help with the sample preparation. This work was supported by the Israeli Science Foundation. The Synchrotron Radiation Center is supported by NSF DMR-0084402. Part of this work was performed at the Swiss Light Source, Paul Scherrer Institut, Switzerland.
PY - 2011/1/25
Y1 - 2011/1/25
N2 - The phase diagram of the superconducting high-Tc cuprates is governed by two energy scales: T*, the temperature below which a gap is opened in the excitation spectrum, and Tc, 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 Tc's, and measured their gap using angle-resolved photoemission spectroscopy (ARPES). We show that Tc is not related to the gap shape or size, but it controls the size of the coherence peak at the gap edge.
AB - The phase diagram of the superconducting high-Tc cuprates is governed by two energy scales: T*, the temperature below which a gap is opened in the excitation spectrum, and Tc, 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 Tc's, and measured their gap using angle-resolved photoemission spectroscopy (ARPES). We show that Tc is not related to the gap shape or size, but it controls the size of the coherence peak at the gap edge.
UR - http://www.scopus.com/inward/record.url?scp=79251484348&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevLett.106.047002
DO - https://doi.org/10.1103/PhysRevLett.106.047002
M3 - مقالة
SN - 0031-9007
VL - 106
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 047002
ER -