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Superconducting coherent quasiparticle weight in high-Tc superconductor from angle-resolved photoemission |
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| Authors: | H Ding JR EngelbrechtZ Wang S-C WangH-B Yang JC Campuzano T TakahashiK Kadowaki DG Hinks |
| Affiliation: | a Department of Physics, Boston College, 140 Commonwealth Avenue, Chestnut Hill, MA 02467, USA b Department of Physics, University of Illinois at Chicago, Chicago, IL 60607, USA c Materials Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA d Department of Physics, Tohoku University, 980 Sendai, Japan e Institute of Materials Science, University of Tsukuba, Ibaraki 305, Japan |
| Abstract: | We study the doping and temperature dependence of the single-particle coherent weight, zA, for high-Tc superconductors Bi2Sr2CaCu2O8+x using angle-resolved photoemission. We find that at low temperatures the coherent weight zA at (π,0) is proportional to the carrier concentration x and that the temperature-dependence of zA is similar to that of the c-axis superfluid density. We show that, for a wide range of carrier concentration, the superconducting transition temperature scales with the product of the low-temperature coherent weight and the maximum superconducting gap. |
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